{"database": "openregs", "table": "cfr_sections", "is_view": false, "human_description_en": "where part_number = 154 and title_number = 46 sorted by section_id", "rows": [["46:46:5.0.1.3.15.1.74.1", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.1 Incorporation by reference.", "USCG", "", "", "[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 82-042, 53 FR 17705, May 18, 1988; CGD 82-042, 53 FR 18949, May 25, 1988; CGD 88-070, 53 FR 34535, Sept. 7, 1988; CGD 96-041, 61 FR 50732, Sept. 27, 1996; CGD 97-057, 62 FR 51048, Sept. 30, 1997; USCG-1999-5151, 64 FR 67183, Dec. 1, 1999; USCG-2000-7790, 65 FR 58463, Sept. 29, 2000; 69 FR 18803, Apr. 9, 2004; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]", "(a) Certain materials are incorporated by reference into this part with approval of the Director of the Federal Register in accordance with 5 U.S.C. 552(a). The Office of the Federal Register publishes a list \u201cMaterial Approved for Incorporation by Reference,\u201d which appears in the Finding Aids section of this volume. To enforce any edition other than the one listed in paragraph (b) of this section, notice of change must be published in the  Federal Register  and the material made available. All approved material is on file at the Coast Guard Headquarters. Contact Commandant (CG-ENG), Attn: Office of Design and Engineering Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7509; or contact the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to:  http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.\n\n(b) The materials approved for incorporation by reference in this part are:\n\nAmerican Bureau of Shipping (ABS)\n \n ABS Plaza, 16855 Northchase Drive, Houston, TX 77060\n \n Rules for Building and Classing Steel Vessels, 1981 \n \n American National Standards Institute \n \n 11 West 42nd Street, New York, NY 10036 \n \n ANSI Z89.1-69 Safety Requirements for Industrial Head Protection, 1969 \n \n ANSI Z87.1-79 Practice for Occupational and Educational Eye and Face Protection, 1979 \n \n American Society for Testing and Materials (ASTM)\n \n 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. \n \n ASTM A 20/A 20M-97a, Standard Specification for General Requirements for Steel Plates for Pressure Vessels\u2014154.610\n \n ASTM F 1014-92, Standard Specification for Flashlights on Vessels\u2014154.1400\n \n \n Note: \n All other documents referenced in this part are still in effect. \n International Maritime Organization \n \n Publications Section, 4 Albert Embankment, London SE1 7SR, United Kingdom \n \n Resolution A.328(IX), Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1976 \n \n Code For Existing Ships Carrying Liquefied Gases in Bulk, 1976 \n \n Medical First Aid Guide for Use in Accidents Involving Dangerous Goods \n \n Underwriters Laboratories, Inc. \n \n 12 Laboratory Drive, Research Triangle Park, NC 27709-3995 \n \n UL No. 783-79 Standard for Safety, Electric Flashlights for Use in Hazardous Locations, Class 1, Groups C and D, 1979.\n\nABS Plaza, 16855 Northchase Drive, Houston, TX 77060\n\nRules for Building and Classing Steel Vessels, 1981\n\n11 West 42nd Street, New York, NY 10036\n\nANSI Z89.1-69 Safety Requirements for Industrial Head Protection, 1969\n\nANSI Z87.1-79 Practice for Occupational and Educational Eye and Face Protection, 1979\n\n100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.\n\nASTM A 20/A 20M-97a, Standard Specification for General Requirements for Steel Plates for Pressure Vessels\u2014154.610\n\nASTM F 1014-92, Standard Specification for Flashlights on Vessels\u2014154.1400\n\nAll other documents referenced in this part are still in effect.\n\nPublications Section, 4 Albert Embankment, London SE1 7SR, United Kingdom\n\nResolution A.328(IX), Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1976\n\nCode For Existing Ships Carrying Liquefied Gases in Bulk, 1976\n\nMedical First Aid Guide for Use in Accidents Involving Dangerous Goods\n\n12 Laboratory Drive, Research Triangle Park, NC 27709-3995\n\nUL No. 783-79 Standard for Safety, Electric Flashlights for Use in Hazardous Locations, Class 1, Groups C and D, 1979."], ["46:46:5.0.1.3.15.1.74.10", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.22 Foreign flag vessel: Certificate of Compliance endorsement application.", "USCG", "", "", "[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 88-070, 53 FR 34535, Sept. 7, 1988; CGD 89-025, 54 FR 19571, May 8, 1989; CGD 95-072, 60 FR 50466, Sept. 29, 1995; 60 FR 54106, Oct. 19, 1995; USCG-2005-23172, 70 FR 75734, Dec. 21, 2005; USCG-2007-29018, 72 FR 53967, Sept. 21, 2007; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013; USCG-2016-0498, 82 FR 35092, July 28, 2017]", "(a) A person who desires an endorsed Certificate of Compliance to meet \u00a7 154.1802(a) of this part for a foreign flag vessel, whose flag administration issues IMO Certificates, must submit to the Commanding Officer (MSC), Attn: Marine Safety Center, U.S. Coast Guard Stop 7430, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7430, in a written or electronic format, an application that includes the following:\n\n(1) The vessel's valid IMO Certificate.\n\n(2) A description of the vessel.\n\n(3) Specifications for the cargo containment system.\n\n(4) A general arrangement plan of the vessel.\n\n(5) A midship section plan of the vessel.\n\n(6) Schematic plans of the liquid and vapor cargo piping.\n\n(7) A firefighting and safety plan.\n\n(8) If the applicant is requesting an endorsement for the carriage of ethylene oxide, a classification society certification that the vessel meets \u00a7 154.1725(a) (4), (5), and (7).\n\n(9) If the vessel is a new gas vessel, or an existing vessel that does not meet \u00a7 154.12 (b), (c), or (d)\u2014\n\n(i) A certification from a classification society that the vessel\u2014\n\n(A) Has enhanced grades of steel meeting \u00a7 154.170 (b)(1) and (b)(2) for crack arresting purposes in the deck stringer, sheer strake, and bilge strake; and\n\n(B) Meets \u00a7 154.701, or if the vessel carries methane, meets \u00a7 154.703, by having the capability of cargo tank pressure and temperature control without venting; and\n\n(ii) The vessel's valid SOLAS Cargo Ship Safety Construction Certificate and Cargo Ship Safety Equipment Certificate.\n\n(10) Any additional plans, certificates, and information needed by the Commanding Officer, Marine Safety Center to determine whether or not the vessel meets this part.\n\n(b) A person who desires an endorsed Certificate of Compliance to meet \u00a7 154.1802(b) for a foreign flag vessel, whose flag administration does not issue IMO Certificates, must submit to the Commanding Officer, Marine Safety Center the plans, calculations, and information under \u00a7 154.15(b)."], ["46:46:5.0.1.3.15.1.74.11", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.24 Foreign flag vessel: IMO Certificate.", "USCG", "", "", "", "(a) An IMO Certificate issued under the IMO Resolution A.328(IX),\u201dCode for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1975\u201d is usually sufficient evidence of compliance with this part for the Coast Guard to endorse a foreign flag vessel's Certificate of Compliance with the name of each cargo in Table 4 (follows \u00a7 154.1872) that is listed on the IMO Certificate, if the information listed in item 3 of the IMO Certificate shows that\u2014\n\n(1) The design ambient temperatures meet \u00a7 154.174 and \u00a7 154.176;\n\n(2) The cargo tank design stress factors and resulting MARVS of independent tanks type B or C meet \u00a7 154.447 or \u00a7 154.450; and\n\n(3) The cargo tank MARVS of a type IIPG ship meets \u00a7 172.175(c) of this chapter.\n\n(b) If a foreign flag existing gas vessel meets \u00a7 154.12 (b), (c), or (d), the vessel's IMO Certificate issued under the IMO \u201cCode for Existing Ships Carrying Liquefied Gases in Bulk, 1975\u201d is usually sufficient evidence of compliance with the requirements of \u00a7 154.12(e) for the Coast Guard to endorse the Certificate of Compliance with the name of each cargo in Table 4 (follows \u00a7 154.1872) that is listed on the IMO Certificate; however if a foreign flag existing gas vessel does not meet \u00a7 154.12 (b), (c), or (d), an IMO Certificate issued under the IMO \u201cCode for Existing Ships Carrying Liquefied Gases in Bulk, 1975\u201d is not acceptable evidence of compliance with the requirements of this part for the endorsement of a Certificate of Compliance."], ["46:46:5.0.1.3.15.1.74.12", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.30 [Reserved]", "USCG", "", "", "", ""], ["46:46:5.0.1.3.15.1.74.13", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.32 Equivalents.", "USCG", "", "", "", "(a) A vessel that fails to meet the standards in this part for an endorsement on a Certificate of Inspection or a Certificate of Compliance may meet an alternate standard if the Commandant (CG-ENG) finds that the alternate standard provides an equivalent or greater level of protection for the purpose of safety.\n\n(b) The Commandant (CG-ENG) considers issuance of a finding of equivalence to the standard required by this part if the person requesting the finding submits a written application to the Commandant (CG-ENG) that includes\u2014\n\n(1) A detailed explanation of the vessel's characteristics that do not meet the requirements in this part; and\n\n(2) An explanation of how each substituted standard would enable the vessel to meet a level of safety that would be equivalent to or greater than the standard in this part.\n\n(c) Operational methods or procedures may not be substituted for a particular fitting, material, appliance, apparatus, item, or type of equipment required in this part."], ["46:46:5.0.1.3.15.1.74.14", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.34 Special approval: Requests.", "USCG", "", "", "[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]", "Each request for special approval must be in writing and submitted to the Commandant (CG-ENG), Attn: Office of Design and Engineering Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-7509."], ["46:46:5.0.1.3.15.1.74.15", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.36 Correspondence and vessel information: Submission.", "USCG", "", "", "", "Correspondence to the Coast Guard and all vessel information submitted to the Coast Guard must be in English, except\u2014\n\n(a) IMO Certificates may be in French; and\n\n(b) SOLAS Certificates may be in the official language of the flag administration."], ["46:46:5.0.1.3.15.1.74.16", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.40 Right of appeal.", "USCG", "", "", "[CGD 88-033, 54 FR 50381, Dec. 6, 1989]", "Any person directly affected by a decision or action taken under this part, by or on behalf of the Coast Guard, may appeal therefrom in accordance with subpart 1.03 of this chapter."], ["46:46:5.0.1.3.15.1.74.2", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.3 Purpose.", "USCG", "", "", "", "The purpose of this part is to prescribe rules for new and existing gas vessels."], ["46:46:5.0.1.3.15.1.74.3", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.5 Applicability.", "USCG", "", "", "", "This part applies to each self-propelled vessel that has on board bulk liquefied gases as cargo, cargo residue or vapor, except subpart C does not apply if the vessel meets \u00a7 154.12 (b), (c), or (d)."], ["46:46:5.0.1.3.15.1.74.4", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.7 Definitions, acronyms, and terms.", "USCG", "", "", "", "As used in this part:\n\n\u201cA\u201d Class Division  means a division as defined in Regulation 3 of Chapter II-2 of the 1974 Safety Convention.\n\nAccommodation spaces  means public spaces, corridors, lavatories, cabins, offices, hospitals, cinemas, game and hobby rooms, pantries containing no cooking appliances, and spaces used in a similar fashion.\n\nBoiling point  means the temperature at which a substance's vapor pressure is equal to the atmospheric barometric pressure.\n\nBreadth  (B) means the maximum width of the vessel in meters measured amidships to the molded line of the frame in a ship with a metal shell and to the outer surface of the hull in a ship with a shell of any other material.\n\nCargo area  means that part of the vessel that contains the cargo containment system, cargo pump rooms, cargo compressor rooms, and the deck areas over the full beam and the length of the vessel above them, but does not include the cofferdams, ballast spaces, or void spaces at the after end of the aftermost hold space or the forward end of the forwardmost hold space.\n\nCargo containment system  means the arrangement for containment of the cargo including a primary and secondary barrier, associated insulation and any intervening spaces, and adjacent structure that is necessary for the support of these elements.\n\nCargo service space  means space within the cargo area that is more than 2 m\n 2  (21.5 ft.\n 2 ) in deck area and used for work shops, lockers, or store rooms.\n\nCargo tank  means the liquid tight shell that is the primary container of the cargo.\n\nCertificate of Compliance  means a certificate issued by the Coast Guard to a foreign flag vessel after it is examined and found to comply with regulations in this chapter.\n\nCofferdam  means the isolating space between two adjacent steel bulkheads or decks, which could be a void space or a ballast space.\n\nContiguous hull structure  includes the inner deck, the inner bottom plating, longitudinal bulkhead plating, transverse bulkhead plating, floors, webs, stringers, and attached stiffeners.\n\nControl space  means those spaces in which the vessel's radio, main navigating equipment, or the emergency source of power is located or in which the fire control equipment, other than firefighting control equipment under \u00a7 154.1140 to \u00a7 154.1170, is centralized.\n\nDesign temperature  means the minimum cargo temperature the Coast Guard allows for loading, unloading, or carriage.\n\nDesign vapor pressure  (P o ) means the maximum gauge pressure at the top of the cargo tank for the design of the cargo tank.\n\nDocument  means a Certificate of Inspection for a U.S. flag vessel or a Certificate of Compliance for a foreign flag vessel.\n\nExisting gas vessel  means a self-propelled vessel that\u2014\n\n(a) Is delivered on or before October 31, 1976; or\n\n(b) Is delivered between October 31, 1976 and June 30, 1980, and is not a new gas vessel.\n\nFlammable cargoes  includes the following liquefied gases from Table 4 (follows \u00a7 154.1872):\n\nAcetaldehyde \n \n Butadiene \n \n Butane \n \n Butylene \n \n Dimethylamine \n \n Ethane \n \n Ethylamine \n \n Ethyl chloride \n \n Ethylene \n \n Ethylene oxide \n \n Methane (LNG) \n \n Methyl acetylene-propadiene mixture \n \n Methyl bromide \n \n Methyl chloride \n \n Propane \n \n Propylene \n \n Vinyl chloride\n\nAcetaldehyde\n\nButadiene\n\nButane\n\nButylene\n\nDimethylamine\n\nEthane\n\nEthylamine\n\nEthyl chloride\n\nEthylene\n\nEthylene oxide\n\nMethane (LNG)\n\nMethyl acetylene-propadiene mixture\n\nMethyl bromide\n\nMethyl chloride\n\nPropane\n\nPropylene\n\nVinyl chloride\n\nGas-dangerous space  includes the following spaces:\n\n(a) A space in the cargo area without arrangements to provide a safe atmosphere at all times.\n\n(b) An enclosed space outside the cargo area through which any piping that may contain liquid or gaseous cargo passes, or within which that piping terminates, without arrangements to prevent gas from escaping into the space.\n\n(c) A cargo containment system and cargo piping.\n\n(d) A hold space where cargo is carried in a cargo containment system:\n\n(1) With a secondary barrier; or\n\n(2) Without a secondary barrier.\n\n(e) A space separated from a hold space under paragraph (d)(1) of this definition by a single gastight boundary.\n\n(f) A cargo pumproom and a cargo compressor room.\n\n(g) A zone on the weather deck or a semi-enclosed space on the weather deck within 3.05 m (10 ft) of any cargo tank outlet, gas or vapor outlet, cargo pipe flange, cargo valve, or of entrances and ventilation openings to a cargo pump room or a cargo compressor room.\n\n(h) Except for existing gas vessels, the weather deck over the cargo area and 3.05 m (10 ft) forward and aft of the cargo area on the weather deck to 2.4 m (8 ft) above the weather deck.\n\n(i) A zone within 2.4 m (8 ft) of the outer surface of a cargo containment system where the surface is exposed to the weather.\n\n(j) An enclosed or semi-enclosed space in which there is piping containing cargo, except those\u2014\n\n(1) With gas sampling lines for gas detection equipment under \u00a7 154.1350(n); or\n\n(2) In which boil-off gas is used as fuel under \u00a7 154.703.\n\n(k) A space for storage of cargo hoses.\n\n(l) An enclosed or semi-enclosed space having an opening into any gas-dangerous space or zone.\n\nGas-safe space  means a space that is not a gas-dangerous space.\n\nHold space  means the space enclosed by the vessel's structure in which there is a cargo containment system.\n\nIMO  stands for the lnternational Maritime Organization.\n\nIMO Certificate  means a Certificate of Fitness for the Carriage of Liquefied Gases in Bulk issued under the IMO\u2014\n\n(a) \u201cCode for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk\u201d, adopted November 12, 1975 by Assembly Resolution A.328(IX), as amended;\n\n(b) \u201cCode for Existing Ships Carrying Liquefied Gases in Bulk\u201d, adopted November 12, 1975, as amended; or\n\n(c) \u201cRecommendations Concerning Ships Not Covered by the Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk\u201d, (Resolution A.328(IX)), adopted November 12, 1975 by Assembly Resolution A.329(IX).\n\nIndependent tank  is a cargo tank that is permanently affixed to the vessel, is self-supporting, and is not part of the hull or essential to the strength or integrity of the hull.\n\nIndependent tank type A  is an independent cargo tank designed primarily using classification society classical ship structural analysis procedures.\n\nIndependent tank type B  is an independent cargo tank designed from model tests, refined analytical tools, and analysis methods to determine stress levels, fatigue life, and crack propagation characteristics.\n\nIndependent tank type C  (pressure tank) is an independent cargo tank meeting pressure vessel criteria where the dominant stress producing load is design vapor pressure.\n\nInsulation space  means a space, that could be an interbarrier space, occupied wholly or in part by insulation.\n\nIntegral tank  means a cargo tank that is a structural part of the vessel's hull and is influenced in the same manner and by the same loads that stress the adjacent hull structure.\n\nInterbarrier space  means the space between a primary and a secondary barrier, with or without insulation or other material.\n\nLength (L)  is ninety-six percent of the total length in meters on a waterline at eighty-five percent of the least molded depth measured from the top of the keel or the length from the foreside of the stem to the axis of the rudder stock on the waterline, whichever is greater. In vessels having a rake of keel, the waterline is parallel to the design waterline.\n\nLiquefied gas  means a cargo having a vapor pressure of 172 kPa (25 psia) or more at 37.8 \u00b0C (100 \u00b0F).\n\nMARVS  stands for the Maximum Allowable Relief Valve Setting.\n\nMembrane tank  is a cargo tank that is not self-supporting and consists of a thin layer (membrane) supported through insulation by the adjacent hull structure.\n\nNew gas vessel  means a self-propelled vessel that\u2014\n\n(a) Is constructed under a building contract awarded after October 31, 1976;\n\n(b) In the absence of a building contract, has a keel laid or is at a similar stage of construction after December 31, 1976;\n\n(c) Is delivered after June 30, 1980; or\n\n(d) Has undergone a major conversion for which\u2014\n\n(1) The building contract is awarded after October 31, 1976;\n\n(2) In the absence of a building contract, conversion is begun after December 31, 1976; or\n\n(3) Conversion is completed after June 30, 1980.\n\nPrimary barrier  means the inner boundary that contains the cargo when the cargo containment system includes two boundaries.\n\nProcess pressure vessel  means a pressure vessel that is used in a reliquefaction, cargo heating, or other system that processes cargo.\n\nRemote group alarm  means an audible and visual alarm that alerts when an alarm condition exists but does not identify that condition.\n\nSecondary barrier  means the liquid resisting outer boundary of a cargo containment system when the cargo containment system includes two boundaries.\n\nSemi-membrane tank  is a cargo tank that is not self-supporting and that can expand and contract due to thermal, hydrostatic, and pressure loadings. It consists of flat surfaces, supported through insulation by the adjacent hull structure, and shaped corners that connect the flat surfaces.\n\nService space  means a space outside the cargo area that is used for a galley, pantry containing cooking appliances, locker or store room, workshop except those in machinery spaces, and similar spaces and trunks to those spaces.\n\nShut-off valve  is a valve that closes a pipeline and provides nominal metal to metal contact between the valve operating parts, including the disc and gate, and the valve body.\n\nSpecific gravity  (p) means the ratio of the density of the cargo at the design temperature to the density of water at 4 \u00b0C (39 \u00b0F).\n\nTank cover  is the structure protecting those parts of the cargo containment system that protrude through the weather deck and providing continuity to the deck structure.\n\nTank dome  means the uppermost portion of the cargo tank. For below deck cargo containment systems, it means the uppermost portion of the cargo tank that protrudes through the weather deck or through the tank cover.\n\nToxic cargoes  includes the following liquefied gases from Table 4 (follows \u00a7 154.1872):\n\nAcetaldehyde \n \n Ammonia, anhydrous \n \n Dimethylamine \n \n Ethylamine \n \n Ethyl chloride \n \n Ethylene oxide \n \n Methyl bromide \n \n Methyl chloride \n \n Sulfur dioxide \n \n Vinyl chloride\n\nAcetaldehyde\n\nAmmonia, anhydrous\n\nDimethylamine\n\nEthylamine\n\nEthyl chloride\n\nEthylene oxide\n\nMethyl bromide\n\nMethyl chloride\n\nSulfur dioxide\n\nVinyl chloride\n\nVapor pressure  means the absolute equilibrium pressure of the saturated vapor above the liquid, expressed in kPa (psia), at a specific temperature.\n\nVoid space  means an enclosed space in the cargo area outside of the cargo containment system, except a hold space, ballast space, fuel oil tank, cargo pump or compressor room, or any space used by personnel.\n\n1974 Safety Convention  stands for the International Convention on Safety of Life at Sea, 1974, done at London, November 1, 1974."], ["46:46:5.0.1.3.15.1.74.5", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.9 Issuance of documents.", "USCG", "", "", "", "The Coast Guard issues an endorsed Certificate of Inspection to a U.S. flag vessel or an endorsed Certificate of Compliance to a foreign flag vessel that meets this part."], ["46:46:5.0.1.3.15.1.74.6", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.12 Existing gas vessel: Endorsements and requirements.", "USCG", "", "", "", "(a) Except an existing gas vessel under paragraph (b), (c), or (d) of this section, an existing gas vessel must meet subpart C of this part if the owner desires a document endorsed for the carriage of a cargo listed in Table 4 (follows \u00a7 154.1872).\n\n(b) If an existing gas vessel is issued a document by the Coast Guard before November 1, 1987 that is endorsed for the carriage of a cargo listed in Table 4 (follows \u00a7 154.1872), and the owner desires the same endorsement on a reissued document, the vessel must\u2014\n\n(1) Continue to meet the same design and construction standards under which the Coast Guard issued the original document; and\n\n(2) Meet paragraph (e) of this section.\n\n(c) If an existing gas vessel is issued a document by the Coast Guard before November 1, 1987 that is endorsed for the carriage of a cargo listed in Table 4 (follows \u00a7 154.1872), and the owner desires an endorsement for a different cargo listed in that table, the vessel must\u2014\n\n(1) Continue to meet the same design and construction standards under which the Coast Guard issued the original document;\n\n(2) Meet paragraph (e) of this section;\n\n(3) Meet subpart D for the different cargo; and\n\n(4) Meet any additional requirements of this part that the Commandant (CG-ENG) determines to be necessary for safety.\n\n(d) If an existing gas vessel does not meet paragraph (b) or (c) of this section and the owner desires a document endorsed for the carriage of a cargo listed in Table 4 (follows \u00a7 154.1872), the vessel must\u2014\n\n(1) Have a letter from the Coast Guard dated before November 1, 1987 stating that\u2014\n\n(i) Review of the vessel's plans for the carriage of that cargo is completed; or\n\n(ii) The vessel's IMO Certificate endorsed for the carriage of that cargo is accepted;\n\n(2) Meet the plans that were reviewed and marked \u201cExamined\u201d or \u201cApproved\u201d by the Coast Guard, or meet the standards under which the IMO Certificate was issued;\n\n(3) Meet paragraph (e) of this section; and\n\n(4) Meet any additional requirements of this part that the Commandant (CG-ENG) determines to be necessary for safety.\n\n(e) If the owner of a vessel desires any document endorsement described in paragraph (b), (c), or (d) of this section, the existing gas vessel must meet the requirements in each of the following:\n\n(1) Section 154.310 (d) and (e).\n\n(2) Section 154.320 (b) and (c).\n\n(3) Section 154.330 (a) through (e).\n\n(4) Section 154.340(d).\n\n(5) Section 154.345 (a), (b)(1) through (b)(5), (b)(7) and (c).\n\n(6) Section 154.476(a).\n\n(7) Section 154.519(a)(2).\n\n(8) Section 154.534.\n\n(9) Section 154.538.\n\n(10) Section 154.540 (c) and (d).\n\n(11) Section 154.556.\n\n(12) Section 154.558.\n\n(13) Section 154.560.\n\n(14) Section 154.562.\n\n(15) Section 154.703.\n\n(16) Section 154.705.\n\n(17) Section 154.706.\n\n(18) Section 154.707.\n\n(19) Section 154.708.\n\n(20) Section 154.709.\n\n(21) Section 154.904.\n\n(22) Section 154.906.\n\n(23) Section 154.908(a), unless the space is separated from the accommodation, service, or control space by a steel door that\u2014\n\n(i) Is watertight when tested with a firehose at not less than 207 kPa gauge (30 psig);\n\n(ii) Has a means to self-close and does not have latches or other devices designed to hold it open; and\n\n(iii) Has an audible and visual alarm on both sides of the door which is actuated when the door is open.\n\n(24) Section 154.910.\n\n(25) Section 154.912.\n\n(26) Sections 154.1110 through 154.1130, except \u00a7\u00a7 154.1115(b), 154.1120(b), and 154.1125 (c) and (f).\n\n(27) Section 154.1145, except an existing gas vessel with a cargo carrying capacity of less than 2500 m \n 3  (88,200 ft \n 3 ) may have only one self-contained dry chemical storage unit if that unit\u2014\n\n(i) is installed before November 1, 1987; and\n\n(ii) Has the capacity to meet \u00a7 154.1145 (d) and (e), and \u00a7 154.1170(e).\n\n(28) Section 154.1150 (a) and (b).\n\n(29) Section 154.1155.\n\n(30) Section 154.1160.\n\n(31) Section 154.1165 (a), (b), (d), and (f).\n\n(32) Section 154.1170 (b) through (f).\n\n(33) Section 154.1200 (a), (b)(1), and (b)(2).\n\n(34) Section 154.1205(f).\n\n(35) Section 154.1325.\n\n(36) Section 154.1335(e).\n\n(37) Section 154.1350 (e), (f), (i), (o), and (u)."], ["46:46:5.0.1.3.15.1.74.7", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.15 U.S. flag vessel: Endorsement application.", "USCG", "", "", "", "(a) A person who desires the endorsement required under \u00a7 154.1801 for a U.S. flag vessel must submit an application for an endorsement of the vessel's Subchapter D Certificate of Inspection under the procedures in \u00a7 91.55-15 of this chapter.\n\n(b) The person requesting an endorsement under paragraph (a) of this section must submit to the Coast Guard, if requested\u2014\n\n(1) Calculations for hull design required by \u00a7 172.175 of this chapter;\n\n(2) The plans and information listed in \u00a7\u00a7 54.01-18, 56.01-10, 91.55-5 (a), (b), (d), (g), and (h), and 110.25-1 of this chapter;\n\n(3) Plans for the dry chemical supply and distribution systems, including the controls; and\n\n(4) Any other vessel information, including, but not limited to plans, design calculations, test results, certificates, and manufacturer's data, needed to determine whether or not the vessel meets the standards of this part."], ["46:46:5.0.1.3.15.1.74.8", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.17 U.S. flag vessel: Certificate of Inspection endorsement.", "USCG", "", "", "", "The Certificate of Inspection for a U.S. flag vessel allowed to carry a liquefied gas listed in Table 4 has the following endorsement for each cargo, with the corresponding carriage requirement data inserted:\n\nInspected and approved for the carriage of ______ at a maximum allowable relief valve setting of ______ kPa gauge (______ psig) with an F factor of ______, a maximum external pressure of ______ kPa gauge (______ psig), a minimum service temperature of ______ \u00b0C (______ \u00b0F), and a maximum specific gravity of ______. Hull type ______.\n\nInspected and approved for the carriage of ______ at a maximum allowable relief valve setting of ______ kPa gauge (______ psig) with an F factor of ______, a maximum external pressure of ______ kPa gauge (______ psig), a minimum service temperature of ______ \u00b0C (______ \u00b0F), and a maximum specific gravity of ______. Hull type ______."], ["46:46:5.0.1.3.15.1.74.9", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "A", "Subpart A\u2014General", "", "\u00a7 154.19 U.S. flag vessel: IMO certificate issuance.", "USCG", "", "", "[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 95-010, 62 FR 67537, Dec. 24, 1997]", "(a) Either a classification society authorized under 46 CFR part 8, or the Coast Guard Officer in Charge, Marine Inspection, issues an IMO Certificate to a U.S. flag vessel when requested by the owner or representative, if\u2014\n\n(1) The vessel meets the requirements of this part; and\n\n(2) It is a new gas vessel, it meets the IMO Resolution A.328(IX), \u201cCode for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1975\u201d; or\n\n(3) It is an existing gas vessel, it meets the IMO \u201cCode for Existing Ships Carrying Liquefied Gases in Bulk, 1975\u201d.\n\n(b) The IMO Certificate expires on the same date that the vessel's Certificate of Inspection expires."], ["46:46:5.0.1.3.15.2.74.1", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "B", "Subpart B\u2014Inspections and Tests", "", "\u00a7 154.150 Examination required for a Certificate of Compliance.", "USCG", "", "", "[CGD 81-052, 50 FR 8734, Mar. 5, 1985]", "Before a vessel receives an initial or reissued Certificate of Compliance endorsed with the name of a cargo from Table 4 of this part, the vessel must call at a United States port for an examination, during which the Officer in Charge, Marine Inspection, determines whether or not the vessel meets the requirements of this chapter."], ["46:46:5.0.1.3.15.2.74.2", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "B", "Subpart B\u2014Inspections and Tests", "", "\u00a7 154.151 Procedures for having the Coast Guard examine a vessel for a Certificate of Compliance.", "USCG", "", "", "[CGD 81-052, 50 FR 8734, Mar. 5, 1985; 50 FR 15895, Apr. 23, 1985; CGD 77-069, 52 FR 31630, Aug. 21, 1987; CGD 95-072, 60 FR 50466, Sept. 29, 1995; 60 FR 54106, Oct. 19, 1995; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]", "To have the Coast Guard examine the vessel for a Certificate of Compliance, as required in \u00a7 154.150, the owner of a foreign flag vessel must proceed as follows:\n\n(a) After submitting an application under \u00a7 154.22, await notification by the Commanding Officer, Marine Safety Center that review of the vessel's plans or IMO Certificate and supporting documents is complete.\n\n(b) Except when paragraph (c) of this section applies,\n\n(1) After receiving notification from Commanding Officer, Marine Safety Center that review is complete and the application is acceptable, dispatch the vessel to a United States port;\n\n(2) Notify the Officer in Charge, Marine Inspection, for the port where the vessel is to be inspected at least seven days before the vessel arrives and arrange the exact time and other details of the examination. This notification is in addition to any other pre-arrival notice to the Coast Guard required by other regulations and must include:\n\n(i) The name of the vessel's first U.S. port of call;\n\n(ii) The date the vessel is scheduled to arrive;\n\n(iii) The name and telephone number of the owner's local agent; and\n\n(iv) The names of all cargoes listed in Table 4 of this part that are on board the vessel;\n\n(3) Make sure that the following items are available on board the vessel for the use of the Marine Inspector before beginning the examination required by \u00a7 154.150:\n\n(i) A general arrangement (including the location of firefighting, safety, and lifesaving gear); and\n\n(ii) The cargo manual required by \u00a7 154.1810.\n\n(c) If the vessel was accepted for U.S. service on the basis of Coast Guard plan review under \u00a7 154.22(b), the vessel owner must notify Commanding Officer, Marine Safety Center 14 days prior to the vessel's arrival at a U.S. port. This notification must include:\n\n(1) The name of the vessel's first U.S. port of call;\n\n(2) The date the vessel is scheduled to arrive;\n\n(3) The name and telephone number of the owner's local agent; and\n\n(4) The names of all cargoes listed in Table 4 of this part that are on board the vessel."], ["46:46:5.0.1.3.15.3.100.168", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1400 Safety equipment: All vessels.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987; CGD 82-042, 17705, May 18, 1988; USCG-1999-5151, 64 FR 67183, Dec. 1, 1999]", "(a) Instead of the equipment under \u00a7 35.30-20 of this chapter, a vessel of less than 25,000 m\n 3  cargo capacity must have the following personnel safety equipment:\n\n(1) Six self-contained, pressure-demand-type, air-breathing apparatus approved by the Mining Enforcement and Safety Administration (MESA) or the National Institute for Occupational Safety and Health (NIOSH), each having at least a 30 minute capacity.\n\n(2) Nine spare bottles of air for the self-contained air-breathing apparatus, each having at least a 30 minute capacity.\n\n(3) Six steel-cored lifelines.\n\n(4) Six Type II or Type III flashlights constructed and marked in accordance with ASTM F 1014 (incorporated by reference, see \u00a7 154.1).\n\n(5) Three fire axes.\n\n(6) Six helmets that meet ANSI Safety Requirements for Industrial Head Protection, Z-89.1 (1969).\n\n(7) Six sets of boots and gloves that are made of rubber or other electrically non-conductive material.\n\n(8) Six sets of goggles that meet the specifications of ANSI Practice for Occupational and Educational Eye and Face Protection, Z-87.1 (1979).\n\n(9) Three outfits that protect the skin from scalding steam and the heat of a fire, and that have a water resistant outer surface.\n\n(10) Three chemical protective outfits that protect the wearers from the particular personnel hazards presented by the cargo vapor.\n\n(b) Instead of the equipment under \u00a7 35.30-20 of this chapter, a vessel of 25,000 m\n 3  cargo capacity or more must have the following personnel safety equipment:\n\n(1) Eight self-contained, pressure-demand-type, air-breathing apparatus approved by the Mining Enforcement and Safety Administration (MESA) or the National Institute for Occupational Safety and Health (NIOSH), each having at least a 30 minute capacity.\n\n(2) Nine spare bottles of air for the self-contained air-breathing apparatus, each having at least a 30 minute capacity.\n\n(3) Eight steel-cored lifelines.\n\n(4) Eight Type II or Type III flashlights constructed and marked in accordance with ASTM F 1014 (incorporated by reference, see \u00a7 154.1).\n\n(5) Three fire axes.\n\n(6) Eight helmets that meet ANSI Safety Requirements for Industrial Head Protection, Z-89.1 (1969).\n\n(7) Eight sets of boots and gloves that are made of rubber or other electrically non-conductive material.\n\n(8) Eight sets of goggles that meet the specifications of ANSI Practice for Occupational and Educational Eye and Face Protection, Z-87.1 (1979).\n\n(9) Five outfits that protect the skin from scalding steam and the heat of a fire, and that have a water resistant outer surface.\n\n(10) Three chemical protective outfits that protect the wearers from the particular personnel hazards presented by the cargo vapor.\n\n(c) When Table 4 references this section, a vessel carrying the listed cargo must have the following additional personnel protection equipment:\n\n(1) Three self-contained, pressure-demand-type, air-breathing apparatus approved by the Mining Enforcement and Safety Administration (MESA) or the National Institute for Occupational Safety and Health (NIOSH), each having at least a 30 minute capacity.\n\n(2) Nine spare bottles of air for the self-contained air-breathing apparatus, each having at least a 30 minute capacity.\n\n(3) Three steel-cored lifelines.\n\n(4) Three Type II or Type III flashlights constructed and marked in accordance with ASTM F 1014 (incorporated by reference, see \u00a7 154.1).\n\n(5) Three helmets that meet ANSI Safety Requirements for Industrial Head Protection, Z-89.1 (1969).\n\n(6) Three sets of boots and gloves that are made of rubber or other electrically non-conductive material.\n\n(7) Three sets of goggles that meet the specifications of ANSI Practice for Occupational and Educational Eye and Face Protection, Z-87.1 (1979).\n\n(8) Three chemical protective outfits that protect the wearers from the particular personnel hazards presented by the cargo vapor."], ["46:46:5.0.1.3.15.3.100.169", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1405 Respiratory protection.", "USCG", "", "", "", "When Table 4 references this section, a vessel carrying the listed cargo must have:\n\n(a) Respiratory protection equipment for each person on board that protects the person from the cargo vapor for at least 5 minutes; and\n\n(b) Two additional sets of respiratory protection equipment that:\n\n(1) Are stowed in the wheelhouse; and\n\n(2) Protects the wearer from the cargo vapor for at least 5 minutes."], ["46:46:5.0.1.3.15.3.100.170", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1410 Decontamination shower.", "USCG", "", "", "", "When Table 4 references this section, a vessel carrying the listed cargo must have a decontamination shower and an eye wash that:\n\n(a) Are on the weatherdeck; and\n\n(b) Have their location marked EMERGENCY SHOWER in letters:\n\n(1) 7.6 cm (3 in.) high; and\n\n(2) 5.1 cm (2 in.) wide."], ["46:46:5.0.1.3.15.3.100.171", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1415 Air compressor.", "USCG", "", "", "", "Each vessel must have an air compressor to recharge the bottles for the air-breathing apparatus."], ["46:46:5.0.1.3.15.3.100.172", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1420 Stretchers and equipment.", "USCG", "", "", "", "Each vessel must have:\n\n(a) Two stretchers or wire baskets; and\n\n(b) Equipment for lifting an injured person from a cargo tank, hold, or void space."], ["46:46:5.0.1.3.15.3.100.173", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1430 Equipment locker.", "USCG", "", "", "", "One of each item of equipment under \u00a7\u00a7 154.1400 and 154.1420 must be stowed in a marked locker:\n\n(a) On the open deck in or adjacent to the cargo area; or\n\n(b) In the accommodation house, near to a door that opens onto the main deck."], ["46:46:5.0.1.3.15.3.100.174", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1435 Medical first aid guide.", "USCG", "", "", "", "Each vessel must have a copy of the  IMO Medical First Aid Guide for Use in Accidents Involving Dangerous Goods,  printed by IMO, London, U.K."], ["46:46:5.0.1.3.15.3.100.175", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.1440 Antidotes.", "USCG", "", "", "", "Each vessel must have the antidotes prescribed in the  IMO Medical First Aid Guide for Use in Accidents Involving Dangerous Goods,  printed by IMO, London, U.K. for the cargoes being carried."], ["46:46:5.0.1.3.15.3.75.1", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.170 Outer hull steel plating.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) Except as required in paragraph (b) of this section, the outer hull steel plating, including the shell and deck plating must meet the material standards of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d 1981.\n\n(b) Along the length of the cargo area, grades of steel must be as follows:\n\n(1) The deck stringer and sheer strake must be at least Grade E steel or a grade of steel that has equivalent chemical properties, mechanical properties, and heat treatment, and that is specially approved by the Commandant (CG-ENG).\n\n(2) The strake at the turn of the bilge must be Grade D, Grade E, or a grade of steel that has equivalent chemical properties, mechanical properties, and heat treatment, and that is specially approved by the Commandant (CG-ENG).\n\n(3) The outer hull steel of vessels must meet the standards in \u00a7 154.172 if the hull steel temperature is calculated to be below \u22125 \u00b0C (23 \u00b0F) assuming:\n\n(i) For any waters in the world, the ambient cold conditions of still air at 5 \u00b0C (41 \u00b0F) and still sea water at 0 \u00b0C (32 \u00b0F);\n\n(ii) For cargo containment systems with secondary barriers, the temperature of the secondary barrier is the design temperature; and\n\n(iii) For cargo containment systems without secondary barriers, the temperature of the cargo tank is the design temperature."], ["46:46:5.0.1.3.15.3.75.2", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.172 Contiguous steel hull structure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) Except as allowed in paragraphs (b) and (c) of this section, plates, forgings, forged and rolled fittings, and rolled and forged bars and shapes used in the construction of the contiguous steel hull structure must meet the thickness and steel grade in Table 1 for the temperatures under \u00a7\u00a7 154.174(b) and 154.176(b).\n\n(b) for a minimum temperature, determined under \u00a7\u00a7 154,174(b) and 154.176(b), below \u221225 \u00b0C (\u221213 \u00b0F), the contiguous steel hull structure must meet \u00a7 54.25-10 for that minimum temperature.\n\n(c) If a steel grade that is not listed in Table 1 has the equivalent chemical properties, mechanical properties, and heat treatment of a steel grade that is listed, the steel grade not listed may be specially approved by the Commandant (CG-ENG), for use in the contiguous hull structure.\n\nTable 1\u2014Minimum Temperature, Thickness, and Steel Grades in Contiguous Hull Structures\n\n1  Steel grade of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981."], ["46:46:5.0.1.3.15.3.75.3", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.174 Transverse contiguous hull structure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) The transverse contiguous hull structure of a vessel having cargo containment systems without secondary barriers must meet the standards of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981.\n\n(b) The transverse contiguous hull structure of a vessel having cargo containment systems with secondary barriers must be designed for a temperature that is:\n\n(1) Colder than the calculated temperature of this hull structure when:\n\n(i) The temperature of the secondary barrier is the design temperature, and\n\n(ii) The ambient cold condition under \u00a7 154.176(b)(1)(ii) and (iii) are assumed; or\n\n(2) Maintained by the heating system under \u00a7 154.178."], ["46:46:5.0.1.3.15.3.75.4", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.176 Longitudinal contiguous hull structure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) The longitudinal contiguous hull structure of a vessel having cargo containment systems without secondary barriers must meet the standards of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981.\n\n(b) The longitudinal contiguous hull structure of a vessel having cargo containment systems with secondary barriers must be designed for a temperature that is:\n\n(1) Colder than the calculated temperature of this hull structure when:\n\n(i) The temperature of the secondary barrier is the design temperature; and\n\n(ii) For any waters in the world except Alaskan waters, the ambient cold condition of:\n\n(A) Five knots air at \u221218 \u00b0C (0 \u00b0F); and\n\n(B) Still sea water at 0 \u00b0C (32 \u00b0F); or\n\n(iii) For Alaskan waters the ambient cold condition of:\n\n(A) Five knots air at \u221229 \u00b0C (\u221220 \u00b0F); and\n\n(B) Still sea water at \u22122 \u00b0C (28 \u00b0F); or\n\n(2) Maintained by the heating system under \u00a7 154.178, if, without heat, the contiguous hull structure is designed for a temperature that is colder than the calculated temperature of the hull structure assuming the:\n\n(i) Temperature of the secondary barrier is the design temperature; and\n\n(ii) Ambient cold conditions of still air at 5 \u00b0C (41 \u00b0F) and still sea water at 0 \u00b0C (32 \u00b0F)."], ["46:46:5.0.1.3.15.3.75.5", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.178 Contiguous hull structure: Heating system.", "USCG", "", "", "", "The heating system for transverse and longitudinal contiguous hull structure must:\n\n(a) Be shown by a heat load calculation to have the heating capacity to meet \u00a7 154.174(b)(2) or \u00a7 154.176(b)(2);\n\n(b) Have stand-by heating to provide 100% of the required heat load and distribution determined under paragraph (a); and\n\n(c) Meet Parts 52, 53, and 54 of this chapter."], ["46:46:5.0.1.3.15.3.75.6", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.180 Contiguous hull structure: Welding procedure.", "USCG", "", "", "", "Welding procedure tests for contiguous hull structure designed for a temperature colder than \u221218 \u00b0C (0 \u00b0F) must meet \u00a7 54.05-15 and subpart 57.03 of this chapter."], ["46:46:5.0.1.3.15.3.75.7", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.182 Contiguous hull structure: Production weld test.", "USCG", "", "", "", "If a portion of the contiguous hull structure is designed for a temperature colder than \u221234 \u00b0C (\u221230 \u00b0F) and is not part of the secondary barrier, each 100m (328 ft.) of full penetration butt welded joints in that portion of the contiguous hull structure must pass the following production weld tests in the position that the joint is welded:\n\n(a) Bend tests under \u00a7 57.06-4 of this chapter.\n\n(b) A Charpy V-notch toughness test under \u00a7 57.06-5 of this chapter on one set of 3 specimens alternating the notch location on successive tests between the center of the weld and the most critical location in the heat affected zone. \n 2\n\n2  The most critical location in the heat affected zone of the weld is based on procedure qualification results, except austenitic stainless steel need have notches only in the center of the weld.\n\n(c) If the contiguous hull structure does not pass the test under paragraph (b) of this section, the retest procedures under \u00a7 54.05-5(c) must be met."], ["46:46:5.0.1.3.15.3.75.8", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.188 Membrane tank: Inner hull steel.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "For a vessel with membrane tanks, the inner hull plating thickness must meet the deep tank requirements of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981."], ["46:46:5.0.1.3.15.3.75.9", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.195 Aluminum cargo tank: Steel enclosure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) An aluminum cargo tank and its dome must be enclosed by the vessel's hull structure or a separate steel cover.\n\n(b) The steel cover for the aluminum cargo tank must meet the steel structural standards of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981.\n\n(c) The steel cover for the aluminum tank dome must be:\n\n(1) At least 3.2 mm (\n 1/8  in.) thick;\n\n(2) Separated from the tank dome, except at the support points; and\n\n(3) Thermally isolated from the dome."], ["46:46:5.0.1.3.15.3.76.10", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.200 Stability requirements: General.", "USCG", "", "", "[CGD 79-023, 48 FR 51009, Nov. 4, 1983]", "Each vessel must meet the applicable requirements in subchapter S of this chapter."], ["46:46:5.0.1.3.15.3.76.11", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.235 Cargo tank location.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 79-023, 48 FR 51010, Nov. 4, 1983]", "(a) For type IG hulls, cargo tanks must be located inboard of:\n\n(1) The transverse extent of damage for collision penetration specified in Table 172.180 of this chapter;\n\n(2) The vertical extent of damage for grounding penetration specified in Table 172.180 of this chapter; and\n\n(3) 30 inches (760 mm) from the shell plating.\n\n(b) For type IIG, IIPG, and IIIG hulls, cargo tanks must be located inboard of:\n\n(1) The vertical extent of damage for grounding penetration specified in Table 172.180 of this chapter; and\n\n(2) 30 inches (760 mm) from the shell plating.\n\n(c) In vessels having membrane and semi-membrane tanks, the vertical and transverse extents of damage must be measured to the inner hull.\n\n(d) For type IIG, IIPG, and IIIG hulls, cargo tank suction wells may penetrate into the area of bottom damage specified as the vertical extent of damage for grounding penetration in Table 172.180 of this chapter if the penetration is the lesser of 25% of the double bottom height or 13.8 in. (350 mm)."], ["46:46:5.0.1.3.15.3.77.12", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.300 Segregation of hold spaces from other spaces.", "USCG", "", "", "", "Hold spaces must be segregated from machinery and boiler spaces, accommodation, service and control spaces, chain lockers, potable, domestic and feed water tanks, store rooms and spaces immediately below or outboard of hold spaces by a:\n\n(a) Cofferdam, fuel oil tank, or single gastight A-60 Class Division of all welded construction in a cargo containment system not required by this part to have a secondary barrier;\n\n(b) Cofferdam or fuel oil tank in a cargo containment system required by this part to have a secondary barrier; or\n\n(c) If there are no sources of ignition or fire hazards in the adjoining space, single gastight A-O Class Division of all welded construction."], ["46:46:5.0.1.3.15.3.77.13", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.305 Segregation of hold spaces from the sea.", "USCG", "", "", "", "In vessels having cargo containment systems required by this part to have a secondary barrier, hold spaces must be segregated from the sea by:\n\n(a) A double bottom if the cargo tanks meet this part for design temperatures colder than \u221210 \u00b0C (14 \u00b0F); and\n\n(b) Wing tanks if the cargo tanks meet this part for design temperatures colder than \u221255 \u00b0C (\u221267 \u00b0F)."], ["46:46:5.0.1.3.15.3.77.14", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.310 Cargo piping systems.", "USCG", "", "", "", "Cargo liquid or vapor piping must:\n\n(a) Be separated from other piping systems, except where an interconnection to inert gas or purge piping is required by \u00a7 154.901(a);\n\n(b) Not enter or pass through any accommodation, service, or control space;\n\n(c) Except as allowed under \u00a7 154.703, not enter or pass through a machinery space other than a cargo pump or compressor room;\n\n(d) Be in the cargo area except:\n\n(1) As allowed under \u00a7 154.703;\n\n(2) Bow and stern loading piping; and\n\n(3) Emergency jettisoning piping.\n\n(e) Be above the weather deck except:\n\n(1) As allowed under \u00a7 154.703;\n\n(2) Pipes in a trunk traversing void spaces above a cargo containment system; and\n\n(3) Pipes for draining, venting, or purging interbarrier and hold spaces;\n\n(f) Connect into the cargo containment system above the weather deck except:\n\n(1) Pipes in a trunk traversing void spaces above a cargo containment system; and\n\n(2) Pipes for draining, venting, or purging interbarrier and hold spaces.\n\n(g) Be inboard of the transverse cargo tank location required by \u00a7 154.235, except for athwartship shore connection manifolds not subject to internal pressure at sea."], ["46:46:5.0.1.3.15.3.77.15", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.315 Cargo pump and cargo compressor rooms.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) Cargo pump rooms and cargo compressor rooms must be above the weather deck and must be within the cargo area.\n\n(b) Where pumps and compressors are driven by a prime mover in an adjacent gas safe space:\n\n(1) The bulkhead or deck must be gastight; and\n\n(2) The shafting passing through the bulkhead or deck must be sealed by a fixed oil reservoir gland seal, a pressure grease seal, or another type of positive pressure seal specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.77.16", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.320 Cargo control stations.", "USCG", "", "", "", "(a) Cargo control stations must be above the weather deck.\n\n(b) If a cargo control station is in accommodation, service, or control spaces or has access to such a space, the station must:\n\n(1) Be a gas safe space;\n\n(2) Have an access to the space that meets \u00a7 154.330; and\n\n(3) Have indirect reading instrumentation, except for gas detectors.\n\n(c) Cargo control stations, including a room or area, must contain all alarms, indicators, and remote controls associated with each cargo tank that the station controls."], ["46:46:5.0.1.3.15.3.77.17", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.325 Accommodation, service, and control spaces.", "USCG", "", "", "", "(a) Accommodation, service, and control spaces must be outside the cargo area.\n\n(b) If a hold space having a cargo containment system, required by this part to have a secondary barrier, is separated from any accommodation, service, or control space by a cruciform joint, there must be a cofferdam providing at least 760 mm (30 inches) by 760 mm (30 inches) clearance on one side of the cruciform joint."], ["46:46:5.0.1.3.15.3.77.18", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.330 Openings to accommodation, service, or control spaces.", "USCG", "", "", "", "(a) Entrances, forced or natural ventilation intakes and exhausts, and other openings to accommodation, service, or control spaces, except as allowed in paragraph (c) of this section, must be:\n\n(1) At least L/25 or 3.05m (10 ft) from the athwartship bulkhead facing the cargo area, whichever is farther, except that the distance need not exceed 5m (16.4 ft); and\n\n(2) On a house athwartship bulkhead not facing the cargo area or on the outboard side of the house.\n\n(b) Each port light, located on the athwartship bulkhead of a house facing the cargo area or the house sides within the distance specified in paragraph (a)(1) of this section, must be a fixed type.\n\n(c) Wheelhouse doors and windows that are not fixed may be within the distance specified in paragraph (a)(1) of this section from the athwartship bulkhead of a house facing the cargo area, if they have gaskets and pass a tightness test with a fire hose at not less than 207 kPa gauge (30 psig).\n\n(d) Port lights in the hull plating below the uppermost continuous deck and in the first tier of the superstructure must be a fixed type.\n\n(e) Air intakes and openings into accommodation, service, and control spaces must have metal closures that pass a tightness test with a fire hose at not less than 207 kPa gauge (30 psig).\n\n(f) On liquefied toxic gas vessels, the closures required in paragraph (e) of this section must be capable of being closed from inside the space."], ["46:46:5.0.1.3.15.3.77.19", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.340 Access to tanks and spaces in the cargo area.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) Each cargo tank must have a manhole from the weather deck, the clear opening of which is at least 600 mm by 600 mm (23.6 in. by 23.6 in.).\n\n(b) Each access into and through a void space or other gas-dangerous space in the cargo area, except spaces described in paragraph (e) of the definition for \u201cgas-dangerous space\u201d in \u00a7 154.7, must\u2014\n\n(1) Have a clear opening of at least 600 mm by 600 mm (23.6 in. by 23.6 in.) through horizontal openings, hatches, or manholes;\n\n(2) Have a clear opening of at least 600 mm by 800 mm (23.6 in. by 31.5 in.) through bulkheads, frames or other vertical structural members; and\n\n(3) Have a fixed ladder if the lower edge of a vertical opening is more than 600 mm (23.6 in.) above the deck or bottom plating.\n\n(c) Each access trunk in the cargo area must be at least 760 mm (30 in.) in diameter.\n\n(d) The lower edge of each access from the weather deck to gas-safe spaces in the cargo area must be at least 2.4 m (7.9 ft.) above the weather deck or the access must be through an air lock that meets \u00a7 154.345.\n\n(e) The inner hull in the cargo area must be accessible for inspection from at least one side without the removal of any fixed structure or fitting.\n\n(f) The hold space insulation in the cargo area must be accessible for inspection from at least one side from within the hold space or there must be a means, that is specially approved by the Commandant, of determining from outside the hold space whether or not the hold space insulation meets this part."], ["46:46:5.0.1.3.15.3.77.20", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.345 Air locks.", "USCG", "", "", "", "(a) An air lock may be used for access from a gas-dangerous zone on the weather deck to a gas-safe space.\n\n(b) Each air lock must:\n\n(1) Consist of two steel doors, at least 1.5 m (4.9 ft.) but not more than 2.5 m (8.2 ft.) apart, each gasketed and tight when tested with a fire hose at not less 207 kPa gauge (30 psig);\n\n(2) Have self-closing doors with no latches or other devices for holding them open;\n\n(3) Have an audible and visual alarm on both sides which are actuated when both door securing devices are in other than the fully closed position at the same time;\n\n(4) Have mechanical ventilation in the space between the doors from a gas-safe area;\n\n(5) Have a pressure greater than that of the gas-dangerous area on the weather deck;\n\n(6) Have the rate of air change in the space between the doors of at least 8 changes per hour; and\n\n(7) Have the space between the doors monitored for cargo vapor leaks under \u00a7 154.1350.\n\n(c) In addition to the requirements of paragraphs (a) and (b) of this section, no gas-safe space on a liquefied flammable gas carrier may have an air lock unless the space:\n\n(1) Is mechanically ventilated to make the pressure in the space greater than that in the air lock; and\n\n(2) Has a means of automatically de-energizing all electrical equipment that is not explosion-proof in the space when the pressure in the space falls to or below the pressure in the air lock."], ["46:46:5.0.1.3.15.3.77.21", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.350 Bilge and ballast systems in the cargo area.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) Hold, interbarrier, and insulation spaces must have a means of sounding the space or other means of detecting liquid leakage specially approved by the Commandant (CG-ENG).\n\n(b) Each hold and insulation space must have a bilge drainage system.\n\n(c) Interbarrier spaces must have an eductor or pump for removing liquid cargo and returning it to the cargo tanks or to an emergency jettisoning system meeting \u00a7 154.356.\n\n(d) Spaces in the cargo containment portion of the vessel, except ballast spaces and gas-safe spaces, must not connect to pumps in the main machinery space."], ["46:46:5.0.1.3.15.3.77.22", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.355 Bow and stern loading piping.", "USCG", "", "", "", "(a) Bow and stern loading piping must:\n\n(1) Meet \u00a7 154.310;\n\n(2) Be installed in an area away from the accommodation, service, or control space on type IG hulls;\n\n(3) Be clearly marked;\n\n(4) Be segregated from the cargo piping by a removable spool piece in the cargo area or by at least two shut-off valves in the cargo area that have means of locking to meet \u00a7 154.1870(a);\n\n(5) Have a means for checking for cargo vapor between the two valves under paragraph (a)(4) of this section;\n\n(6) Have fixed inert gas purging lines; and\n\n(7) Have fixed vent lines for purging with inert gas to meet \u00a7 154.1870(b).\n\n(b) Entrances, forced or natural ventilation intakes, exhausts, and other openings to accommodation, service, or control spaces that face the bow or stern loading area must meet \u00a7 154.330."], ["46:46:5.0.1.3.15.3.77.23", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.356 Cargo emergency jettisoning piping.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "Emergency jettisoning piping must:\n\n(a) Meet \u00a7 154.355(a);\n\n(b) Be designed to allow cargo discharge without the outer hull steel temperature falling below the minimum temperatures under \u00a7\u00a7 154.170 and 154.172; and\n\n(c) Be specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.78.24", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.401 Definitions.", "USCG", "", "", "", "As used in \u00a7\u00a7 154.440 and 154.447:\n\n\u201c\u03c3 Y \u201d means the minimum yield strength of the tank material, including weld metal, at room temperature.\n\n\u201c\u03c3 B \u201d means minimum tensile strength of the tank material, including weld metals, at room temperature."], ["46:46:5.0.1.3.15.3.78.25", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.405 Design vapor pressure (P", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) The design vapor pressure (P o ) of a cargo tank must be equal to or greater than the MARVS.\n\n(b) The P o  of a cargo tank must be equal to or greater than the vapor pressure of the cargo at 45 \u00b0C (113 \u00b0F) if:\n\n(1) The cargo tank has no temperature control for the cargo; and\n\n(2) The vapor pressure of the cargo results solely from ambient temperature.\n\n(c) The P o  of a cargo tank may be exceeded under harbor conditions if specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.78.26", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.406 Design loads for cargo tanks and fixtures: General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]", "(a) Calculations must show that a cargo tank and its fixtures are designed for the following loads:\n\n(1) Internal pressure head.\n\n(2) External pressure load.\n\n(3) Dynamic loads resulting from the motion of the vessel.\n\n(4) Transient or stationary thermal loads if the design temperature is colder than \u221255 \u00b0C (\u221267 \u00b0F) or causes thermal stresses in cargo tank supports.\n\n(5) Sloshing loads, if the cargo tank is designed for partial loads.\n\n(6) Loads resulting from vessel's deflection.\n\n(7) Tank weight, cargo weight, and corresponding support reaction.\n\n(8) Insulation weight.\n\n(9) Loads of a pipe tower and any other attachments to the cargo tank.\n\n(10) Vapor pressure loads in harbor conditions allowed under \u00a7 154.405.\n\n(11) Gas pressurization if the cargo tank is designed for gas pressurization as a means of cargo transfer.\n\n(b) A cargo tank must be designed for the most unfavorable static heel angle within a 0\u00b0 to 30\u00b0 range without exceeding the allowable stress of the material.\n\n(c) A hydrostatic or hydropneumatic test design load must be specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.78.27", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.407 Cargo tank internal pressure head.", "USCG", "", "", "", "(a) For the calculation required under \u00a7 154.406(a)(1) and (b), the internal pressure head (h eq ), must be determined from the following formula:\n\nh eq  = 10 P o  + (h gd ) max\n\nwhere:\n \n h gd  (the value of internal pressure, in meters of fresh water, resulting from the combined effects of gravity and dynamic accelerations of a full tank) = a\u03b2 Z\u03b2 Y;\n \n where:\n \n a\u03b2 = dimensionless acceleration relative to the acceleration of gravity resulting from gravitational and dynamic loads in the \u03b2 direction (see figure 1); \n \n Z\u03b2 = largest liquid height (m) above the point where the pressure is to be determined in the \u03b2 direction (see figure 2); \n \n Y = maximum specific weight of the cargo (t/m\n 3 ) at the design temperature.\n\nwhere:\n\nh gd  (the value of internal pressure, in meters of fresh water, resulting from the combined effects of gravity and dynamic accelerations of a full tank) = a\u03b2 Z\u03b2 Y;\n\nwhere:\n\na\u03b2 = dimensionless acceleration relative to the acceleration of gravity resulting from gravitational and dynamic loads in the \u03b2 direction (see figure 1);\n\nZ\u03b2 = largest liquid height (m) above the point where the pressure is to be determined in the \u03b2 direction (see figure 2);\n\nY = maximum specific weight of the cargo (t/m\n 3 ) at the design temperature.\n\n(b) The (h gd )  max  is determined for the \u03b2 direction, on the ellipse in Figure 1, which gives the maximum value for h gd .\n\n(c) When the longitudinal acceleration is considered in addition to the vertical transverse acceleration, an ellipsoid must be used in the calculations instead of the ellipse contained in Figure 1."], ["46:46:5.0.1.3.15.3.78.28", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.408 Cargo tank external pressure load.", "USCG", "", "", "", "For the calculation required under \u00a7 154.406 (a)(2) and (b), the external pressure load must be the difference between the minimum internal pressure (maximum vacuum), and the maximum external pressure to which any portion of the cargo tank may be simultaneously subjected."], ["46:46:5.0.1.3.15.3.78.29", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.409 Dynamic loads from vessel motion.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) For the calculation required under \u00a7 154.406 (a)(3) and (b), the dynamic loads must be determined from the long term distribution of vessel motions, including the effects of surge, sway, heave, roll, pitch, and yaw on irregular seas that the vessel may experience during 10\n 8  wave encounters. The speed used for this calculation may be reduced from the ship service speed if specially approved by the Commandant (CG-ENG) and if that reduced speed is used in the hull strength calculation under \u00a7 31.10-5(c) of this chapter.\n\n(b) If the loads determined under paragraphs (c), (d), or (e) of this section result in a design stress that is lower than the allowable stress of the material under \u00a7\u00a7 154.610, 154.615, or 154.620, the allowable stress must be reduced to that stress determined in paragraphs (c), (d), or (e).\n\n(c) If a tank is designed to avoid plastic deformation and buckling, then acceleration components of the dynamic loads must be determined for the largest loads the vessel may experience during an operating life corresponding to the probability level of 10 \u22128,  by using one of the following methods:\n\n(1) Method 1 is a detailed analysis of the vessel's acceleration components.\n\n(2) Method 2 applies to vessels of 50 m (164 ft) or more in length and is an analysis by the following formulae that corresponds to a 10 \u22128  probability level in the North Atlantic:\n\n(i) Vertical acceleration under paragraph (f)(1) of this section:\n\n(d) If a cargo tank is designed to avoid fatigue, the dynamic loads determined under paragraph (a) of this section must be used to develop the dynamic spectrum.\n\n(e) If a cargo tank is designed to avoid uncontrolled crack propagation, the dynamic loads are:\n\n(1) Determined under paragraph (a) of this section; and\n\n(2) For a load distribution for a period of 15 days by the method in Figure 3.\n\n(f) When determining the accelerations for dynamic loads under paragraph (a) of this section, the accelerations acting in a cargo tank must be estimated for the cargo tank's center of gravity and include the following component accelerations:\n\n(1) Vertical accelerations, meaning the motion acceleration of heave and pitch, and of any roll normal to the vessel base that has an effect on the component acceleration.\n\n(2) Transverse acceleration, meaning the motion acceleration of sway, yaw and roll, and gravity component of roll.\n\n(3) Longitudinal acceleration, meaning the motion acceleration of surge and pitch and gravity component of pitch."], ["46:46:5.0.1.3.15.3.78.30", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.410 Cargo tank sloshing loads.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) For the calculation required under \u00a7 154.406 (a)(5) and (b), the determined sloshing loads resulting from the accelerations under \u00a7 154.409(f) must be specially approved by the Commandant (CG-ENG).\n\n(b) If the sloshing loads affect the cargo tank scantlings, an analysis of the effects of the sloshing loads in addition to the calculation under paragraph (a) of this section must be specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.78.31", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.411 Cargo tank thermal loads.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "For the calculations required under \u00a7 154.406(a)(4), the following determined loads must be specially approved by the Commandant (CG-ENG):\n\n(a) Transient thermal loads for the cooling down periods of cargo tanks for design temperatures lower than \u221255 \u00b0C (\u221267 \u00b0F).\n\n(b) Stationary thermal loads for cargo tanks for design temperatures lower than \u221255 \u00b0C (\u221267 \u00b0F) that cause high thermal stress."], ["46:46:5.0.1.3.15.3.78.32", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.412 Cargo tank corrosion allowance.", "USCG", "", "", "", "A cargo tank must be designed with a corrosion allowance if the cargo tank:\n\n(a) is located in a space that does not have inert gas or dry air; or\n\n(b) carries a cargo that corrodes the tank material.\n\nCorrosion allowance for independent tank type C is contained in \u00a7 54.01-35 of this chapter."], ["46:46:5.0.1.3.15.3.79.33", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.418 General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "An integral tank must not be designed for a temperature colder than \u221210 \u00b0C (14 \u00b0F), unless the tank is specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.79.34", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.419 Design vapor pressure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The P o  of an integral tank must not exceed 24.5 kPa gauge (3.55 psig) unless special approval by the Commandant (CG-ENG) allows a P o  between 24.5 kPa gauge (3.55 psig) and 69 kPa gauge (10 psig)."], ["46:46:5.0.1.3.15.3.79.35", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.420 Tank design.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) The structure of an integral tank must meet the deep tank scantling standards of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981.\n\n(b) The structure of an integral tank must be designed and shown by calculation to withstand the internal pressure determined under \u00a7 154.407."], ["46:46:5.0.1.3.15.3.79.36", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.421 Allowable stress.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "The allowable stress for the integral tank structure must meet the American Bureau of Shipping's allowable stress for the vessel's hull published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981."], ["46:46:5.0.1.3.15.3.80.37", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.425 General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The design of the hull structure and the design of the membrane tank system, that includes the membrane tank, secondary barrier, including welds, the supporting insulation, and pressure control equipment, must be specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.80.38", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.426 Design vapor pressure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The P o  of a membrane tank must not exceed 24.5 kPa gauge (3.55 psig) unless special approval by the Commandant (CG-ENG) allows a P o  between 24.5 kPa gauge (3.55 psig) and 69 kPa gauge (10 psig)."], ["46:46:5.0.1.3.15.3.80.39", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.427 Membrane tank system design.", "USCG", "", "", "", "A membrane tank system must be designed for:\n\n(a) Any static and dynamic loads with respect to plastic deformation and fatigue;\n\n(b) Combined strains from static, dynamic, and thermal loads;\n\n(c) Preventing collapse of the membrane from:\n\n(1) Over-pressure in the interbarrier space;\n\n(2) Vacuum in the cargo tank;\n\n(3) Sloshing in a partially filled cargo tank; and\n\n(4) Hull vibrations; and\n\n(d) The deflections of the vessel's hull."], ["46:46:5.0.1.3.15.3.80.40", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.428 Allowable stress.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The membrane tank and the supporting insulation must have allowable stresses that are specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.80.41", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.429 Calculations.", "USCG", "", "", "", "The tank design load calculations for a membrane tank must include the following:\n\n(a) Plastic deformation and fatigue life resulting from static and dynamic loads in the membrane and the supporting insulation.\n\n(b) The response of the membrane and its supporting insulation to vessel motion and acceleration under the worst weather conditions. Calculations from a similar vessel may be submitted to meet this paragraph.\n\n(c) The combined strains from static, dynamic, and thermal loads."], ["46:46:5.0.1.3.15.3.80.42", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.430 Material test.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) The membrane and the membrane supporting insulation must be made of materials that withstand the combined strains calculated under \u00a7 154.429(c).\n\n(b) Analyzed data of a material test for the membrane and the membrane supporting insulation must be submitted to the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.80.43", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.431 Model test.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) The primary and secondary barrier of a membrane tank, including the corners and joints, must withstand the combined strains from static, dynamic, and thermal loads calculated under \u00a7 154.429(c).\n\n(b) Analyzed data of a model test for the primary and secondary barrier of the membrane tank must be submitted to the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.80.44", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.432 Expansion and contraction.", "USCG", "", "", "", "The support system of a membrane tank must allow for thermal and physical expansion and contraction of the tank."], ["46:46:5.0.1.3.15.3.81.45", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.435 General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) The design of a semi-membrane tank, the supporting insulation for the tank, and the supporting hull structure for the tank must be specially approved by the Commandant (CG-ENG).\n\n(b) A semi-membrane tank must be designed to meet:\n\n(1) \u00a7 154.425 through \u00a7 154.432;\n\n(2) \u00a7 154.437 through \u00a7 154.440; or\n\n(3) \u00a7 154.444 through \u00a7 154.449."], ["46:46:5.0.1.3.15.3.81.46", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.436 Design vapor pressure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The P o  of a semi-membrane tank must not exceed 24.5 kPa gauge (3.55 psig) unless special approval by the Commandant (CG-ENG) allows a P o  between 24.5 kPa gauge (3.55 psig) and 69 kPa gauge (10 psig)."], ["46:46:5.0.1.3.15.3.82.47", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.437 General.", "USCG", "", "", "", "An independent tank type A must meet \u00a7 154.438 through \u00a7 154.440."], ["46:46:5.0.1.3.15.3.82.48", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.438 Design vapor pressure.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]", "(a) If the surface of an independent tank type A are mostly flat surfaces, the P o  must not exceed 69 kPa gauge (10 psig).\n\n(b) If the surfaces of an independent tank type A are formed by bodies of revolution, the design calculation of the P o  must be specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.82.49", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.439 Tank design.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "An independent tank type A must meet the deep tank standard of the American Bureau of Shipping published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981, and must:\n\n(a) Withstand the internal pressure determined under \u00a7 154.407;\n\n(b) Withstand loads from tank supports calculated under \u00a7\u00a7 154.470 and 154.471; and\n\n(c) Have a corrosion allowance that meets \u00a7 154.412."], ["46:46:5.0.1.3.15.3.82.50", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.440 Allowable stress.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]", "(a) The allowable stresses for an independent tank type A must:\n\n(1) For tank web frames, stringers, or girders of carbon manganese steel or aluminum alloys, meet \u03c3 B /2.66 or \u03c3 Y /1.33, whichever is less; and\n\n(2) For other materials, be specially approved by the Commandant (CG-ENG).\n\n(b) A greater allowable stress than required in paragraph (a)(1) of this section may be specially approved by the Commandant (CG-ENG) if the equivalent stress (\u03c3 c ) is calculated from the formula in appendix A of this part.\n\n(c) Tank plating must meet the American Bureau of Shipping's deep tank standards, for an internal pressure head that meets \u00a7 154.439(a), published in \u201cRules for Building and Classing Steel Vessels\u201d, 1981."], ["46:46:5.0.1.3.15.3.83.51", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.444 General.", "USCG", "", "", "", "An independent tank type B must be designed to meet \u00a7\u00a7 154.445 through 154.449."], ["46:46:5.0.1.3.15.3.83.52", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.445 Design vapor pressure.", "USCG", "", "", "", "If the surfaces of an independent tank type B are mostly flat surfaces, the P o  must not exceed 69 kPa gauge (10 psig)."], ["46:46:5.0.1.3.15.3.83.53", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.446 Tank design.", "USCG", "", "", "", "An independent tank type B must meet the calculations under \u00a7 154.448."], ["46:46:5.0.1.3.15.3.83.54", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.447 Allowable stress.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) An independent tank type B designed from bodies of revolution must have allowable stresses \n 3 \n   determined by the following formulae:\n\n3  See Appendix B for stress analyses definitions.\n\n\u03c3 m \u2264f\n\n\u03c3 L \u22641.5 f\n\n\u03c3 b \u22641.5 F\n\n\u03c3 L  + \u03c3 b \u22641.5 F\n\n\u03c3 m  + \u03c3 b \u22641.5 F\n\nwhere:\n \n \u03c3 m  = equivalent primary general membrane stress \n 4 \n  \n \n \n \n 4  See Appendix A for equivalent stress. \n \u03c3 L  = equivalent primary local membrane stress \n 4  \n \n \u03c3 b  = equivalent primary bending stress \n 4  \n \n f = the lesser of (\u03c3 B /A) or (\u03c3 Y /B) \n \n F = the lesser of (\u03c3 B /C) or (\u03c3 Y /D) \n \n A, B, C, and D = stress factors in Table 2.\n\nwhere:\n\n\u03c3 m  = equivalent primary general membrane stress \n 4\n\n4  See Appendix A for equivalent stress.\n\n\u03c3 L  = equivalent primary local membrane stress \n 4\n\n\u03c3 b  = equivalent primary bending stress \n 4\n\nf = the lesser of (\u03c3 B /A) or (\u03c3 Y /B)\n\nF = the lesser of (\u03c3 B /C) or (\u03c3 Y /D)\n\nA, B, C, and D = stress factors in Table 2.\n\nTable 2\u2014Values for Stress Factors\n\n(b) An independent tank type B designed from plane surfaces must have allowable stresses specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.83.55", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.448 Calculations.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The following calculations for an independent tank type B must be specially approved by the Commandant (CG-ENG):\n\n(a) Plastic deformation, fatigue life, buckling, and crack propagation resulting from static and dynamic loads on the tank and its support.\n\n(b) A three-dimensional analysis of the stress exerted by the hull on the tank, its support, and its keys.\n\n(c) The response of the tank and its support to the vessel's motion and acceleration in irregular waves or calculations from a similar vessel.\n\n(d) A tank buckling analysis considering the maximum construction tolerance.\n\n(e) A finite element analysis using the loads determined under \u00a7 154.406.\n\n(f) A fracture mechanics analysis using the loads determined under \u00a7 154.406.\n\n(g) The cumulative effects of the fatigue load from the following formula:\n\nwhere:\n \n n i  = the number of stress cycles at each stress level during the life of the vessel; \n \n N i  = the number of cycles to failure for corresponding stress levels from the Wohler (S-N) curve; \n \n N j  = the number of cycles to failure from the fatigue load by loading and unloading the tank; and \n \n C w  = 0.5 or less. A C w  of greater than 0.5 but not exceeding 1.0 may be specially approved by the Commandant (G-MTH).\n\nwhere:\n\nn i  = the number of stress cycles at each stress level during the life of the vessel;\n\nN i  = the number of cycles to failure for corresponding stress levels from the Wohler (S-N) curve;\n\nN j  = the number of cycles to failure from the fatigue load by loading and unloading the tank; and\n\nC w  = 0.5 or less. A C w  of greater than 0.5 but not exceeding 1.0 may be specially approved by the Commandant (G-MTH)."], ["46:46:5.0.1.3.15.3.83.56", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.449 Model test.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The following analyzed data of a model test of structural elements for independent tank type B must be submitted to the Commandant (CG-ENG) for special approval:\n\n(a) Stress concentration factors.\n\n(b) Fatigue life."], ["46:46:5.0.1.3.15.3.84.57", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.450 General.", "USCG", "", "", "", "Independent tanks type C and process pressure vessels must be designed to meet the requirements under Part 54 of this chapter, except \u00a7 54.01-40(b), and:\n\n(a) The calculation under \u00a7 54.01-18 (b)(1) must also include the design loads determined under \u00a7 154.406;\n\n(b) The calculated tank plating thickness, including any corrosion allowance, must be the minimum thickness without a negative plate tolerance; and\n\n(c) The minimum tank plating thickness must not be less than:\n\n(1) 5mm (\n 3/16  in.) for carbon-manganese steel and nickel steel;\n\n(2) 3mm (\n 1/8  in.) for austenitic steels; or\n\n(3) 7mm (\n 9/32  in.) for aluminum alloys."], ["46:46:5.0.1.3.15.3.84.58", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.451 Design vapor pressure.", "USCG", "", "", "", "The P o  (kPa) of an independent tank type C must be calculated by the following formula:\n\nP o  = 196 + AC( \u03c1 ) \n 3/2\n\nwhere:\n \n A = 1.813 (\u03c3 m / \u0394 \u03c3 A ) \n 2 ; \n \n \u03c3 m  = design primary membrane stress; \n \n \u0394 \u03c3 A  = (allowable dynamic membrane stress for double amplitude at probability level Q = 10 \u22128 ) 53.9 MPa (7821 psi) for ferritic and martensitic steels and 24.5 MPa (3555 psi) for 5083-0 aluminum; \n \n C = a characteristic tank dimension that is the greatest of h, 0.75b, or 0.45 l; \n \n where: \n \n h = the height of the tank or the dimension in the vessel's vertical direction, in meters; \n \n b = the width of the tank or the dimension in the vessel's transverse direction; in meters; and\n \n l = the length of the tank or the dimension in the vessel's longitudinal direction, in meters; and\n \n \u03c1  = the specific gravity of the cargo.\n\nwhere:\n\nA = 1.813 (\u03c3 m / \u0394 \u03c3 A ) \n 2 ;\n\n\u03c3 m  = design primary membrane stress;\n\n\u0394 \u03c3 A  = (allowable dynamic membrane stress for double amplitude at probability level Q = 10 \u22128 ) 53.9 MPa (7821 psi) for ferritic and martensitic steels and 24.5 MPa (3555 psi) for 5083-0 aluminum;\n\nC = a characteristic tank dimension that is the greatest of h, 0.75b, or 0.45 l;\n\nwhere:\n\nh = the height of the tank or the dimension in the vessel's vertical direction, in meters;\n\nb = the width of the tank or the dimension in the vessel's transverse direction; in meters; and\n\nl = the length of the tank or the dimension in the vessel's longitudinal direction, in meters; and\n\n\u03c1  = the specific gravity of the cargo."], ["46:46:5.0.1.3.15.3.84.59", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.452 External pressure.", "USCG", "", "", "", "The design external pressure, P e , for an independent tank type C must be calculated by the following formula:\n\nP e  = P 1  + P 2  + P 3  + P 4\n\nwhere:\n \n P 1  = the vacuum relief valve setting for tanks with a vacuum relief valve, or 24.5 kPa gauge (3.55 psig) for tanks without a vacuum relief valve.\n \n P 2  = 0, or the pressure relief valve setting for an enclosed space containing any portion of a pressure vessel.\n \n P 3  = total compressive load in the tank shell from the weight of the tank, including corrosion allowance, weight of insulation, weight of dome, weight of pipe tower and piping, the effect of the partially filled tank, the effect of acceleration and hull deflection, and the local effect of external and internal pressure.\n \n P 4  = 0, or the external pressure from the head of water from any portion of the pressure vessel on exposed decks.\n\nwhere:\n\nP 1  = the vacuum relief valve setting for tanks with a vacuum relief valve, or 24.5 kPa gauge (3.55 psig) for tanks without a vacuum relief valve.\n\nP 2  = 0, or the pressure relief valve setting for an enclosed space containing any portion of a pressure vessel.\n\nP 3  = total compressive load in the tank shell from the weight of the tank, including corrosion allowance, weight of insulation, weight of dome, weight of pipe tower and piping, the effect of the partially filled tank, the effect of acceleration and hull deflection, and the local effect of external and internal pressure.\n\nP 4  = 0, or the external pressure from the head of water from any portion of the pressure vessel on exposed decks."], ["46:46:5.0.1.3.15.3.84.60", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.453 Failure to meet independent tank type C standards.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]", "If the Commandant (CG-ENG) determines during plan review, that a tank designed as an independent tank type C fails to meet the standards under \u00a7 154.450, \u00a7 154.451, and 154.452 and cannot be redesigned to meet those standards, the tank may be redesigned as an independent tank type A or B."], ["46:46:5.0.1.3.15.3.85.61", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.459 General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "(a) Each cargo tank must have a secondary barrier that meets Table 3 and except as allowed in Table 3, the hull must not be the secondary barrier.\n\n(b) If the Commandant (CG-ENG) specially approves an integral tank for a design temperature at atmospheric pressure lower than \u221210 \u00b0C (14 \u00b0F), the integral tank must have a complete secondary barrier that meets \u00a7 154.460.\n\n(c) If the Commandant (CG-ENG) specially approves a semi-membrane tank under the requirements of an independent tank type B, the semi-membrane tank may have a partial secondary barrier specially approved by the Commandant (CG-ENG).\n\n(d) If Table 3 allows the hull to be a secondary barrier, the vessel's hull must:\n\n(1) Meet \u00a7\u00a7 154.605 through 154.630; and\n\n(2) Be designed for the stresses resulting from the design temperature.\n\nTable 3\u2014Secondary Barriers for Tanks\n\n1  The hull may be a secondary barrier."], ["46:46:5.0.1.3.15.3.85.62", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.460 Design criteria.", "USCG", "", "", "", "At static angles of heel up through 30\u00b0, a secondary barrier must\n\n(a) If a complete secondary barrier is required in \u00a7 154.459, hold all of the liquid cargo in the cargo tank for at least 15 days under the dynamic loads in \u00a7 154.409(e);\n\n(b) If a partial secondary barrier is permitted in \u00a7 154.459, hold any leakage of liquid cargo corresponding to the extent of failure under \u00a7 154.448(a) after initial detection or primary barrier leak for at least 15 days under the dynamic loads in \u00a7 154.409(e);\n\n(c) If the primary barrier fails, prevent the temperature of the vessel's structure from falling below the minimum allowable service temperature of the steel; and\n\n(d) Be designed so that a cargo tank failure does not cause a failure in the secondary barrier."], ["46:46:5.0.1.3.15.3.86.63", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.465 General.", "USCG", "", "", "", "If the design temperature is below \u221210 \u00b0C (14 \u00b0F), the cargo tank insulation must prevent the temperature of the vessel's hull from cooling below the minimum temperature allowed under \u00a7 154.172."], ["46:46:5.0.1.3.15.3.86.64", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.466 Design criteria.", "USCG", "", "", "", "(a) The insulation for a cargo tank without a secondary barrier must be designed for the cargo tank at the design temperature, and for a vessel operating in:\n\n(1) Any waters in the world, except Alaskan waters, for the ambient cold condition of:\n\n(i) Five knots air at \u221218 \u00b0C (0 \u00b0F); and\n\n(ii) Still sea water at 0 \u00b0C (32 \u00b0F); or\n\n(2) Alaskan waters for the ambient cold condition of:\n\n(i) Five knots air at \u221229 \u00b0C (20 \u00b0F); and\n\n(ii) Still sea water at \u22122 \u00b0C (28 \u00b0F).\n\n(b) The insulation for a cargo tank with a secondary barrier must be designed for the secondary barrier at the design temperature, and the ambient cold conditions listed under paragraph (a)(1) or paragraph (a)(2) of this section.\n\n(c) The insulation material must be designed for any loads transmitted from adjacent hull structure.\n\n(d) Insulation for cargo tank and piping must meet \u00a7 38.05-20 of this chapter.\n\n(e) Powder or granulated insulation must:\n\n(1) Not compact from vibrations of the vessel;\n\n(2) Maintain the thermal conductivity listed under \u00a7 154.467; and\n\n(3) Not exert a static pressure greater than the external design pressure of the cargo tank under \u00a7 154.408."], ["46:46:5.0.1.3.15.3.86.65", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.467 Submission of insulation information.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "The following insulation information must be submitted for special approval by the Commandant (CG-ENG):\n\n(a) Compatibility with the cargo.\n\n(b) Solubility in the cargo.\n\n(c) Absorption of the cargo.\n\n(d) Shrinkage.\n\n(e) Aging.\n\n(f) Closed cell content.\n\n(g) Density.\n\n(h) Mechanical properties.\n\n(i) Thermal expansion.\n\n(j) Abrasion.\n\n(k) Cohesion.\n\n(l) Thermal conductivity.\n\n(m) Resistance to vibrations.\n\n(n) Resistance to fire and flame spread.\n\n(o) The manufacturing and installation details of the insulation including:\n\n(1) Fabrication;\n\n(2) Storage;\n\n(3) Handling;\n\n(4) Erection; and\n\n(5) Quality control."], ["46:46:5.0.1.3.15.3.87.66", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.470 General.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 FR 58285, Sept. 29, 2014]", "(a) A cargo tank must have a support system that:\n\n(1) prevents movement of the cargo tank under the static and dynamic loads in \u00a7 154.406; and\n\n(2) allows the cargo tank to contract and expand from temperature variation and hull deflection without exceeding the design stress of the cargo tank and the hull.\n\n(b) The cargo tank support system must have a key that prevents rotation of the cargo tank.\n\n(c) An independent tank must have supports with an antifloatation system that withstands the upward force of the tank without causing plastic deformation that endangers the hull structure when the tank is:\n\n(1) Empty; and\n\n(2) In a hold space flooded to the summer load draft of the vessel."], ["46:46:5.0.1.3.15.3.87.67", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.471 Design criteria.", "USCG", "", "", "", "(a) The cargo tank support system must be designed:\n\n(1) For the loads in \u00a7 154.406(a);\n\n(2) To not exceed the allowable stress under this part at a static angle of heel of 30\u00b0;\n\n(3) To withstand a collision force equal to at least one-half the weight of the cargo tank and cargo from forward and one-quarter the weight of the cargo tank and cargo from aft; and\n\n(4) For the largest resulting acceleration in Figure 1, including rotational and translation effects.\n\n(b) The cargo tank support design loads in paragraph (a) of this section may be analyzed separately."], ["46:46:5.0.1.3.15.3.87.68", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.476 Cargo transfer devices and means.", "USCG", "", "", "", "(a) If a cargo pump in a cargo tank is not accessible for repair when the cargo tank is in use, the cargo tank must have an additional means of cargo transfer, such as another pump or gas pressurization.\n\n(b) If cargo is transferred by gas pressurization, the pressurizing line must have a safety relief valve that is set at less than 90 percent of the tank relief valve setting."], ["46:46:5.0.1.3.15.3.88.69", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.500 Cargo and process piping standards.", "USCG", "", "", "", "The cargo liquid and vapor piping and process piping systems must meet the requirements in \u00a7\u00a7 154.503 through 154.562, Subparts 56.01 through 56.35, \u00a7\u00a7 56.50-20 and 56.50-105, and Subparts 56.60 through 56.97 of this chapter."], ["46:46:5.0.1.3.15.3.88.70", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.503 Piping and piping system components: Protection from movement.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "Where thermal movement and movements of the cargo tank and the hull structure may cause stresses that exceed the design stresses, the piping and piping system components and cargo tanks must be protected from movement by:\n\n(a) Offsets;\n\n(b) Loops;\n\n(c) Bends;\n\n(d) Mechanical expansion joints including:\n\n(1) Bellows;\n\n(2) Slip joints;\n\n(3) Ball joints; or\n\n(e) Other means specially approved by the Commandant (CG-ENG)."], ["46:46:5.0.1.3.15.3.88.71", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.506 Mechanical expansion joint: Limits in a piping system.", "USCG", "", "", "", "Mechanical expansion joints in a piping system outside of a cargo tank:\n\n(a) May be installed only if offsets, loops or bends cannot be installed due to limited space or piping arrangement;\n\n(b) Must be a bellows type; and\n\n(c) Must not have insulation or a cover unless necessary to prevent damage."], ["46:46:5.0.1.3.15.3.88.72", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.512 Piping: Thermal isolation.", "USCG", "", "", "", "Low temperature piping must be thermally isolated from any adjacent hull structure to prevent the temperature of that structure from dropping below the minimum temperature for the hull material under \u00a7 154.170."], ["46:46:5.0.1.3.15.3.88.73", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.514 Piping: Electrical bonding.", "USCG", "", "", "", "(a) Cargo tanks or piping that are separated from the hull structure by thermal isolation must be electrically bonded to the hull structure by a method under paragraph (c) of this section.\n\n(b) A pipe joint or a hose connection fitting that has a gasket must be electrically bonded by a method under paragraph (c) of this section that bonds:\n\n(1) Both sides of the connection to the hull structure; or\n\n(2) Each side of the connection to the other side.\n\n(c) An electrical bond must be made by at least one of the following methods:\n\n(1) A metal bonding strap attached by welding or bolting.\n\n(2) Two or more bolts that give metal to metal contact between the bolts and the parts to be bonded.\n\n(3) Metal to metal contact between adjacent parts under designed operating conditions."], ["46:46:5.0.1.3.15.3.88.74", 46, "Shipping", "I", "O", "154", "PART 154\u2014SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES", "C", "Subpart C\u2014Design, Construction and Equipment", "", "\u00a7 154.516 Piping: Hull protection.", "USCG", "", "", "[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]", "A vessel's hull must be protected from low temperature liquid leakage by a drip pan, or other means specially approved by the Commandant (CG-ENG), at:\n\n(a) Each piping connection dismantled on a routine basis;\n\n(b) Cargo discharge and loading manifolds; 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