openregs: cfr_sections: 246 rows where part_number = 154 and title_number = 46 sorted by section

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section_id ▼	title_number	title_name	chapter	subchapter	part_number	part_name	subpart	subpart_name	section_heading	agency	amendment_citations	full_text
46:46:5.0.1.3.15.1.74.1	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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 “Material Approved for Incorporation by Reference,” 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. (b) The materials approved for incorporation by reference in this part are: American Bureau of Shipping (ABS) ABS Plaza, 16855 Northchase Drive, Houston, TX 77060 Rules for Building and Classing Steel Vessels, 1981 American National Standards Institute 11 West 42nd Street, New York, NY 10036 ANSI Z89.1-69 Safety Requirements for Industrial Head Protection, 1969 ANSI Z87.1-79 Practice for Occupational and Educational Eye and Face Protection, 1979 American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM A 20/A 20M-97a, Standard Specification for General Requirements for Steel Plates for Pressure Vessels—154.610 ASTM F 1014-92, Standard Specification for Flashlights on Vessels—154.1400 Note: All other documents referenced in this part are still in effect. International Maritime Organization Publications Section, 4 Albert Embankment, London SE1 7SR, United Kingdom Resolution A.328(IX), Code for the Construction and Equipment of Ships Carrying Li…
46:46:5.0.1.3.15.1.74.10	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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 § 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: (1) The vessel's valid IMO Certificate. (2) A description of the vessel. (3) Specifications for the cargo containment system. (4) A general arrangement plan of the vessel. (5) A midship section plan of the vessel. (6) Schematic plans of the liquid and vapor cargo piping. (7) A firefighting and safety plan. (8) If the applicant is requesting an endorsement for the carriage of ethylene oxide, a classification society certification that the vessel meets § 154.1725(a) (4), (5), and (7). (9) If the vessel is a new gas vessel, or an existing vessel that does not meet § 154.12 (b), (c), or (d)— (i) A certification from a classification society that the vessel— (A) Has enhanced grades of steel meeting § 154.170 (b)(1) and (b)(2) for crack arresting purposes in the deck stringer, sheer strake, and bilge strake; and (B) Meets § 154.701, or if the vessel carries methane, meets § 154.703, by having the capability of cargo tank pressure and temperature control without venting; and (ii) The vessel's valid SOLAS Cargo Ship Safety Construction Certificate and Cargo Ship Safety Equipment Certificate. (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. (b) A person who desires an endorsed Certificate of Compliance to meet § 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 § 154.15(b).
46:46:5.0.1.3.15.1.74.11	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 154.24 Foreign flag vessel: IMO Certificate.	USCG		(a) An IMO Certificate issued under the IMO Resolution A.328(IX),”Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1975” 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 § 154.1872) that is listed on the IMO Certificate, if the information listed in item 3 of the IMO Certificate shows that— (1) The design ambient temperatures meet § 154.174 and § 154.176; (2) The cargo tank design stress factors and resulting MARVS of independent tanks type B or C meet § 154.447 or § 154.450; and (3) The cargo tank MARVS of a type IIPG ship meets § 172.175(c) of this chapter. (b) If a foreign flag existing gas vessel meets § 154.12 (b), (c), or (d), the vessel's IMO Certificate issued under the IMO “Code for Existing Ships Carrying Liquefied Gases in Bulk, 1975” is usually sufficient evidence of compliance with the requirements of § 154.12(e) for the Coast Guard to endorse the Certificate of Compliance with the name of each cargo in Table 4 (follows § 154.1872) that is listed on the IMO Certificate; however if a foreign flag existing gas vessel does not meet § 154.12 (b), (c), or (d), an IMO Certificate issued under the IMO “Code for Existing Ships Carrying Liquefied Gases in Bulk, 1975” 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 154.30 [Reserved]	USCG
46:46:5.0.1.3.15.1.74.13	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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. (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— (1) A detailed explanation of the vessel's characteristics that do not meet the requirements in this part; and (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. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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— (a) IMO Certificates may be in French; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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 § 154.12 (b), (c), or (d).
46:46:5.0.1.3.15.1.74.4	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 154.7 Definitions, acronyms, and terms.	USCG		As used in this part: “A” Class Division means a division as defined in Regulation 3 of Chapter II-2 of the 1974 Safety Convention. Accommodation 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. Boiling point means the temperature at which a substance's vapor pressure is equal to the atmospheric barometric pressure. Breadth (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. Cargo 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. Cargo 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. Cargo service space means space within the cargo area that is more than 2 m 2 (21.5 ft. 2 ) in deck area and used for work shops, lockers, or store rooms. Cargo tank means the liquid tight shell that is the primary container of the cargo. Certificate 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. Cofferdam means the isolating space between two adjacent steel bulkheads or decks, which could be a void space or a ballast space. Contiguous hull structure includes the inner deck, the inner bottom plating, longitudinal bulkhead plating, transverse bulkhead plating, floors, webs, stringers, and attached stiffener…
46:46:5.0.1.3.15.1.74.5	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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 § 154.1872). (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 § 154.1872), and the owner desires the same endorsement on a reissued document, the vessel must— (1) Continue to meet the same design and construction standards under which the Coast Guard issued the original document; and (2) Meet paragraph (e) of this section. (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 § 154.1872), and the owner desires an endorsement for a different cargo listed in that table, the vessel must— (1) Continue to meet the same design and construction standards under which the Coast Guard issued the original document; (2) Meet paragraph (e) of this section; (3) Meet subpart D for the different cargo; and (4) Meet any additional requirements of this part that the Commandant (CG-ENG) determines to be necessary for safety. (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 § 154.1872), the vessel must— (1) Have a letter from the Coast Guard dated before November 1, 1987 stating that— (i) Review of the vessel's plans for the carriage of that cargo is completed; or (ii) The vessel's IMO Certificate endorsed for the carriage of that cargo is accepted; (2) Meet the plans that were reviewed and marked “Examined” or “Approved” by the Coast Guard, or meet the standards under which the IMO Certificate was issued; (3) Meet paragraph (e) of this section; and (4) Meet any additional requirements of this part that the Commandant (CG-ENG) determin…
46:46:5.0.1.3.15.1.74.7	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 154.15 U.S. flag vessel: Endorsement application.	USCG		(a) A person who desires the endorsement required under § 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 § 91.55-15 of this chapter. (b) The person requesting an endorsement under paragraph (a) of this section must submit to the Coast Guard, if requested— (1) Calculations for hull design required by § 172.175 of this chapter; (2) The plans and information listed in §§ 54.01-18, 56.01-10, 91.55-5 (a), (b), (d), (g), and (h), and 110.25-1 of this chapter; (3) Plans for the dry chemical supply and distribution systems, including the controls; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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: Inspected 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 ______ °C (______ °F), and a maximum specific gravity of ______. Hull type ______. Inspected 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 ______ °C (______ °F), 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	A	Subpart A—General	§ 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— (1) The vessel meets the requirements of this part; and (2) It is a new gas vessel, it meets the IMO Resolution A.328(IX), “Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk, 1975”; or (3) It is an existing gas vessel, it meets the IMO “Code for Existing Ships Carrying Liquefied Gases in Bulk, 1975”. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	B	Subpart B—Inspections and Tests	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	B	Subpart B—Inspections and Tests	§ 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 § 154.150, the owner of a foreign flag vessel must proceed as follows: (a) After submitting an application under § 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. (b) Except when paragraph (c) of this section applies, (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; (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: (i) The name of the vessel's first U.S. port of call; (ii) The date the vessel is scheduled to arrive; (iii) The name and telephone number of the owner's local agent; and (iv) The names of all cargoes listed in Table 4 of this part that are on board the vessel; (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 § 154.150: (i) A general arrangement (including the location of firefighting, safety, and lifesaving gear); and (ii) The cargo manual required by § 154.1810. (c) If the vessel was accepted for U.S. service on the basis of Coast Guard plan review under § 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: (1) The name of the vessel's first U.S. port of call; (2) The date the vessel is scheduled to arrive; (3) The name and telephone number of the owner's local agent; and (4) The names of all cargoes listed in Table 4 of this part that are on …
46:46:5.0.1.3.15.3.100.168	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 35.30-20 of this chapter, a vessel of less than 25,000 m 3 cargo capacity must have the following personnel safety equipment: (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. (2) Nine spare bottles of air for the self-contained air-breathing apparatus, each having at least a 30 minute capacity. (3) Six steel-cored lifelines. (4) Six Type II or Type III flashlights constructed and marked in accordance with ASTM F 1014 (incorporated by reference, see § 154.1). (5) Three fire axes. (6) Six helmets that meet ANSI Safety Requirements for Industrial Head Protection, Z-89.1 (1969). (7) Six sets of boots and gloves that are made of rubber or other electrically non-conductive material. (8) Six sets of goggles that meet the specifications of ANSI Practice for Occupational and Educational Eye and Face Protection, Z-87.1 (1979). (9) Three outfits that protect the skin from scalding steam and the heat of a fire, and that have a water resistant outer surface. (10) Three chemical protective outfits that protect the wearers from the particular personnel hazards presented by the cargo vapor. (b) Instead of the equipment under § 35.30-20 of this chapter, a vessel of 25,000 m 3 cargo capacity or more must have the following personnel safety equipment: (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. (2) Nine spare bottles of air for the self-contained air-breathing apparatus, each having at least a 30 minute capacity. (3) Eight steel-cored lifelines. (4) Eight Type II or Type III flashlights constructed and marked in accordance with ASTM F 1014 (incorporated by reference, see § …
46:46:5.0.1.3.15.3.100.169	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.1405 Respiratory protection.	USCG		When Table 4 references this section, a vessel carrying the listed cargo must have: (a) Respiratory protection equipment for each person on board that protects the person from the cargo vapor for at least 5 minutes; and (b) Two additional sets of respiratory protection equipment that: (1) Are stowed in the wheelhouse; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) Are on the weatherdeck; and (b) Have their location marked EMERGENCY SHOWER in letters: (1) 7.6 cm (3 in.) high; and (2) 5.1 cm (2 in.) wide.
46:46:5.0.1.3.15.3.100.171	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.1420 Stretchers and equipment.	USCG		Each vessel must have: (a) Two stretchers or wire baskets; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.1430 Equipment locker.	USCG		One of each item of equipment under §§ 154.1400 and 154.1420 must be stowed in a marked locker: (a) On the open deck in or adjacent to the cargo area; or (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels” 1981. (b) Along the length of the cargo area, grades of steel must be as follows: (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). (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). (3) The outer hull steel of vessels must meet the standards in § 154.172 if the hull steel temperature is calculated to be below −5 °C (23 °F) assuming: (i) For any waters in the world, the ambient cold conditions of still air at 5 °C (41 °F) and still sea water at 0 °C (32 °F); (ii) For cargo containment systems with secondary barriers, the temperature of the secondary barrier is the design temperature; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 §§ 154.174(b) and 154.176(b). (b) for a minimum temperature, determined under §§ 154,174(b) and 154.176(b), below −25 °C (−13 °F), the contiguous steel hull structure must meet § 54.25-10 for that minimum temperature. (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. Table 1—Minimum Temperature, Thickness, and Steel Grades in Contiguous Hull Structures 1 Steel grade of the American Bureau of Shipping published in “Rules for Building and Classing Steel Vessels”, 1981.
46:46:5.0.1.3.15.3.75.3	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981. (b) The transverse contiguous hull structure of a vessel having cargo containment systems with secondary barriers must be designed for a temperature that is: (1) Colder than the calculated temperature of this hull structure when: (i) The temperature of the secondary barrier is the design temperature, and (ii) The ambient cold condition under § 154.176(b)(1)(ii) and (iii) are assumed; or (2) Maintained by the heating system under § 154.178.
46:46:5.0.1.3.15.3.75.4	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981. (b) The longitudinal contiguous hull structure of a vessel having cargo containment systems with secondary barriers must be designed for a temperature that is: (1) Colder than the calculated temperature of this hull structure when: (i) The temperature of the secondary barrier is the design temperature; and (ii) For any waters in the world except Alaskan waters, the ambient cold condition of: (A) Five knots air at −18 °C (0 °F); and (B) Still sea water at 0 °C (32 °F); or (iii) For Alaskan waters the ambient cold condition of: (A) Five knots air at −29 °C (−20 °F); and (B) Still sea water at −2 °C (28 °F); or (2) Maintained by the heating system under § 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: (i) Temperature of the secondary barrier is the design temperature; and (ii) Ambient cold conditions of still air at 5 °C (41 °F) and still sea water at 0 °C (32 °F).
46:46:5.0.1.3.15.3.75.5	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.178 Contiguous hull structure: Heating system.	USCG		The heating system for transverse and longitudinal contiguous hull structure must: (a) Be shown by a heat load calculation to have the heating capacity to meet § 154.174(b)(2) or § 154.176(b)(2); (b) Have stand-by heating to provide 100% of the required heat load and distribution determined under paragraph (a); and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.180 Contiguous hull structure: Welding procedure.	USCG		Welding procedure tests for contiguous hull structure designed for a temperature colder than −18 °C (0 °F) must meet § 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.182 Contiguous hull structure: Production weld test.	USCG		If a portion of the contiguous hull structure is designed for a temperature colder than −34 °C (−30 °F) 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: (a) Bend tests under § 57.06-4 of this chapter. (b) A Charpy V-notch toughness test under § 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. 2 2 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. (c) If the contiguous hull structure does not pass the test under paragraph (b) of this section, the retest procedures under § 54.05-5(c) must be met.
46:46:5.0.1.3.15.3.75.8	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981.
46:46:5.0.1.3.15.3.75.9	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (b) The steel cover for the aluminum cargo tank must meet the steel structural standards of the American Bureau of Shipping published in “Rules for Building and Classing Steel Vessels”, 1981. (c) The steel cover for the aluminum tank dome must be: (1) At least 3.2 mm ( 1/8 in.) thick; (2) Separated from the tank dome, except at the support points; and (3) Thermally isolated from the dome.
46:46:5.0.1.3.15.3.76.10	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (1) The transverse extent of damage for collision penetration specified in Table 172.180 of this chapter; (2) The vertical extent of damage for grounding penetration specified in Table 172.180 of this chapter; and (3) 30 inches (760 mm) from the shell plating. (b) For type IIG, IIPG, and IIIG hulls, cargo tanks must be located inboard of: (1) The vertical extent of damage for grounding penetration specified in Table 172.180 of this chapter; and (2) 30 inches (760 mm) from the shell plating. (c) In vessels having membrane and semi-membrane tanks, the vertical and transverse extents of damage must be measured to the inner hull. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (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; (b) Cofferdam or fuel oil tank in a cargo containment system required by this part to have a secondary barrier; or (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) A double bottom if the cargo tanks meet this part for design temperatures colder than −10 °C (14 °F); and (b) Wing tanks if the cargo tanks meet this part for design temperatures colder than −55 °C (−67 °F).
46:46:5.0.1.3.15.3.77.14	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.310 Cargo piping systems.	USCG		Cargo liquid or vapor piping must: (a) Be separated from other piping systems, except where an interconnection to inert gas or purge piping is required by § 154.901(a); (b) Not enter or pass through any accommodation, service, or control space; (c) Except as allowed under § 154.703, not enter or pass through a machinery space other than a cargo pump or compressor room; (d) Be in the cargo area except: (1) As allowed under § 154.703; (2) Bow and stern loading piping; and (3) Emergency jettisoning piping. (e) Be above the weather deck except: (1) As allowed under § 154.703; (2) Pipes in a trunk traversing void spaces above a cargo containment system; and (3) Pipes for draining, venting, or purging interbarrier and hold spaces; (f) Connect into the cargo containment system above the weather deck except: (1) Pipes in a trunk traversing void spaces above a cargo containment system; and (2) Pipes for draining, venting, or purging interbarrier and hold spaces. (g) Be inboard of the transverse cargo tank location required by § 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (b) Where pumps and compressors are driven by a prime mover in an adjacent gas safe space: (1) The bulkhead or deck must be gastight; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.320 Cargo control stations.	USCG		(a) Cargo control stations must be above the weather deck. (b) If a cargo control station is in accommodation, service, or control spaces or has access to such a space, the station must: (1) Be a gas safe space; (2) Have an access to the space that meets § 154.330; and (3) Have indirect reading instrumentation, except for gas detectors. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.325 Accommodation, service, and control spaces.	USCG		(a) Accommodation, service, and control spaces must be outside the cargo area. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (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 (2) On a house athwartship bulkhead not facing the cargo area or on the outboard side of the house. (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. (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). (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. (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). (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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.). (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 “gas-dangerous space” in § 154.7, must— (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; (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 (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. (c) Each access trunk in the cargo area must be at least 760 mm (30 in.) in diameter. (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 § 154.345. (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. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (b) Each air lock must: (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); (2) Have self-closing doors with no latches or other devices for holding them open; (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; (4) Have mechanical ventilation in the space between the doors from a gas-safe area; (5) Have a pressure greater than that of the gas-dangerous area on the weather deck; (6) Have the rate of air change in the space between the doors of at least 8 changes per hour; and (7) Have the space between the doors monitored for cargo vapor leaks under § 154.1350. (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: (1) Is mechanically ventilated to make the pressure in the space greater than that in the air lock; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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). (b) Each hold and insulation space must have a bilge drainage system. (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 § 154.356. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.355 Bow and stern loading piping.	USCG		(a) Bow and stern loading piping must: (1) Meet § 154.310; (2) Be installed in an area away from the accommodation, service, or control space on type IG hulls; (3) Be clearly marked; (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 § 154.1870(a); (5) Have a means for checking for cargo vapor between the two valves under paragraph (a)(4) of this section; (6) Have fixed inert gas purging lines; and (7) Have fixed vent lines for purging with inert gas to meet § 154.1870(b). (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 § 154.330.
46:46:5.0.1.3.15.3.77.23	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) Meet § 154.355(a); (b) Be designed to allow cargo discharge without the outer hull steel temperature falling below the minimum temperatures under §§ 154.170 and 154.172; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.401 Definitions.	USCG		As used in §§ 154.440 and 154.447: “σ Y ” means the minimum yield strength of the tank material, including weld metal, at room temperature. “σ B ” 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (b) The P o of a cargo tank must be equal to or greater than the vapor pressure of the cargo at 45 °C (113 °F) if: (1) The cargo tank has no temperature control for the cargo; and (2) The vapor pressure of the cargo results solely from ambient temperature. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (1) Internal pressure head. (2) External pressure load. (3) Dynamic loads resulting from the motion of the vessel. (4) Transient or stationary thermal loads if the design temperature is colder than −55 °C (−67 °F) or causes thermal stresses in cargo tank supports. (5) Sloshing loads, if the cargo tank is designed for partial loads. (6) Loads resulting from vessel's deflection. (7) Tank weight, cargo weight, and corresponding support reaction. (8) Insulation weight. (9) Loads of a pipe tower and any other attachments to the cargo tank. (10) Vapor pressure loads in harbor conditions allowed under § 154.405. (11) Gas pressurization if the cargo tank is designed for gas pressurization as a means of cargo transfer. (b) A cargo tank must be designed for the most unfavorable static heel angle within a 0° to 30° range without exceeding the allowable stress of the material. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.407 Cargo tank internal pressure head.	USCG		(a) For the calculation required under § 154.406(a)(1) and (b), the internal pressure head (h eq ), must be determined from the following formula: h eq = 10 P o + (h gd ) max where: 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) = aβ Zβ Y; where: aβ = dimensionless acceleration relative to the acceleration of gravity resulting from gravitational and dynamic loads in the β direction (see figure 1); Zβ = largest liquid height (m) above the point where the pressure is to be determined in the β direction (see figure 2); Y = maximum specific weight of the cargo (t/m 3 ) at the design temperature. where: 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) = aβ Zβ Y; where: aβ = dimensionless acceleration relative to the acceleration of gravity resulting from gravitational and dynamic loads in the β direction (see figure 1); Zβ = largest liquid height (m) above the point where the pressure is to be determined in the β direction (see figure 2); Y = maximum specific weight of the cargo (t/m 3 ) at the design temperature. (b) The (h gd ) max is determined for the β direction, on the ellipse in Figure 1, which gives the maximum value for h gd . (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.408 Cargo tank external pressure load.	USCG		For the calculation required under § 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 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 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 § 31.10-5(c) of this chapter. (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 §§ 154.610, 154.615, or 154.620, the allowable stress must be reduced to that stress determined in paragraphs (c), (d), or (e). (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 −8, by using one of the following methods: (1) Method 1 is a detailed analysis of the vessel's acceleration components. (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 −8 probability level in the North Atlantic: (i) Vertical acceleration under paragraph (f)(1) of this section: (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. (e) If a cargo tank is designed to avoid uncontrolled crack propagation, the dynamic loads are: (1) Determined under paragraph (a) of this section; and (2) For a load distribution for a period of 15 days by the method in Figure 3. (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 i…
46:46:5.0.1.3.15.3.78.30	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.406 (a)(5) and (b), the determined sloshing loads resulting from the accelerations under § 154.409(f) must be specially approved by the Commandant (CG-ENG). (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.406(a)(4), the following determined loads must be specially approved by the Commandant (CG-ENG): (a) Transient thermal loads for the cooling down periods of cargo tanks for design temperatures lower than −55 °C (−67 °F). (b) Stationary thermal loads for cargo tanks for design temperatures lower than −55 °C (−67 °F) that cause high thermal stress.
46:46:5.0.1.3.15.3.78.32	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.412 Cargo tank corrosion allowance.	USCG		A cargo tank must be designed with a corrosion allowance if the cargo tank: (a) is located in a space that does not have inert gas or dry air; or (b) carries a cargo that corrodes the tank material. Corrosion allowance for independent tank type C is contained in § 54.01-35 of this chapter.
46:46:5.0.1.3.15.3.79.33	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 −10 °C (14 °F), 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981. (b) The structure of an integral tank must be designed and shown by calculation to withstand the internal pressure determined under § 154.407.
46:46:5.0.1.3.15.3.79.36	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981.
46:46:5.0.1.3.15.3.80.37	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.427 Membrane tank system design.	USCG		A membrane tank system must be designed for: (a) Any static and dynamic loads with respect to plastic deformation and fatigue; (b) Combined strains from static, dynamic, and thermal loads; (c) Preventing collapse of the membrane from: (1) Over-pressure in the interbarrier space; (2) Vacuum in the cargo tank; (3) Sloshing in a partially filled cargo tank; and (4) Hull vibrations; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.429 Calculations.	USCG		The tank design load calculations for a membrane tank must include the following: (a) Plastic deformation and fatigue life resulting from static and dynamic loads in the membrane and the supporting insulation. (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. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.429(c). (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.429(c). (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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). (b) A semi-membrane tank must be designed to meet: (1) § 154.425 through § 154.432; (2) § 154.437 through § 154.440; or (3) § 154.444 through § 154.449.
46:46:5.0.1.3.15.3.81.46	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.437 General.	USCG		An independent tank type A must meet § 154.438 through § 154.440.
46:46:5.0.1.3.15.3.82.48	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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). (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 “Rules for Building and Classing Steel Vessels”, 1981, and must: (a) Withstand the internal pressure determined under § 154.407; (b) Withstand loads from tank supports calculated under §§ 154.470 and 154.471; and (c) Have a corrosion allowance that meets § 154.412.
46:46:5.0.1.3.15.3.82.50	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (1) For tank web frames, stringers, or girders of carbon manganese steel or aluminum alloys, meet σ B /2.66 or σ Y /1.33, whichever is less; and (2) For other materials, be specially approved by the Commandant (CG-ENG). (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 (σ c ) is calculated from the formula in appendix A of this part. (c) Tank plating must meet the American Bureau of Shipping's deep tank standards, for an internal pressure head that meets § 154.439(a), published in “Rules for Building and Classing Steel Vessels”, 1981.
46:46:5.0.1.3.15.3.83.51	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.444 General.	USCG		An independent tank type B must be designed to meet §§ 154.445 through 154.449.
46:46:5.0.1.3.15.3.83.52	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.446 Tank design.	USCG		An independent tank type B must meet the calculations under § 154.448.
46:46:5.0.1.3.15.3.83.54	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 3 determined by the following formulae: 3 See Appendix B for stress analyses definitions. σ m ≤f σ L ≤1.5 f σ b ≤1.5 F σ L + σ b ≤1.5 F σ m + σ b ≤1.5 F where: σ m = equivalent primary general membrane stress 4 4 See Appendix A for equivalent stress. σ L = equivalent primary local membrane stress 4 σ b = equivalent primary bending stress 4 f = the lesser of (σ B /A) or (σ Y /B) F = the lesser of (σ B /C) or (σ Y /D) A, B, C, and D = stress factors in Table 2. where: σ m = equivalent primary general membrane stress 4 4 See Appendix A for equivalent stress. σ L = equivalent primary local membrane stress 4 σ b = equivalent primary bending stress 4 f = the lesser of (σ B /A) or (σ Y /B) F = the lesser of (σ B /C) or (σ Y /D) A, B, C, and D = stress factors in Table 2. Table 2—Values for Stress Factors (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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): (a) Plastic deformation, fatigue life, buckling, and crack propagation resulting from static and dynamic loads on the tank and its support. (b) A three-dimensional analysis of the stress exerted by the hull on the tank, its support, and its keys. (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. (d) A tank buckling analysis considering the maximum construction tolerance. (e) A finite element analysis using the loads determined under § 154.406. (f) A fracture mechanics analysis using the loads determined under § 154.406. (g) The cumulative effects of the fatigue load from the following formula: where: n i = the number of stress cycles at each stress level during the life of the vessel; N i = the number of cycles to failure for corresponding stress levels from the Wohler (S-N) curve; N j = the number of cycles to failure from the fatigue load by loading and unloading the tank; and 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). where: n i = the number of stress cycles at each stress level during the life of the vessel; N i = the number of cycles to failure for corresponding stress levels from the Wohler (S-N) curve; N j = the number of cycles to failure from the fatigue load by loading and unloading the tank; and 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).
46:46:5.0.1.3.15.3.83.56	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) Stress concentration factors. (b) Fatigue life.
46:46:5.0.1.3.15.3.84.57	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 54.01-40(b), and: (a) The calculation under § 54.01-18 (b)(1) must also include the design loads determined under § 154.406; (b) The calculated tank plating thickness, including any corrosion allowance, must be the minimum thickness without a negative plate tolerance; and (c) The minimum tank plating thickness must not be less than: (1) 5mm ( 3/16 in.) for carbon-manganese steel and nickel steel; (2) 3mm ( 1/8 in.) for austenitic steels; or (3) 7mm ( 9/32 in.) for aluminum alloys.
46:46:5.0.1.3.15.3.84.58	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.451 Design vapor pressure.	USCG		The P o (kPa) of an independent tank type C must be calculated by the following formula: P o = 196 + AC( ρ ) 3/2 where: A = 1.813 (σ m / Δ σ A ) 2 ; σ m = design primary membrane stress; Δ σ A = (allowable dynamic membrane stress for double amplitude at probability level Q = 10 −8 ) 53.9 MPa (7821 psi) for ferritic and martensitic steels and 24.5 MPa (3555 psi) for 5083-0 aluminum; C = a characteristic tank dimension that is the greatest of h, 0.75b, or 0.45 l; where: h = the height of the tank or the dimension in the vessel's vertical direction, in meters; b = the width of the tank or the dimension in the vessel's transverse direction; in meters; and l = the length of the tank or the dimension in the vessel's longitudinal direction, in meters; and ρ = the specific gravity of the cargo. where: A = 1.813 (σ m / Δ σ A ) 2 ; σ m = design primary membrane stress; Δ σ A = (allowable dynamic membrane stress for double amplitude at probability level Q = 10 −8 ) 53.9 MPa (7821 psi) for ferritic and martensitic steels and 24.5 MPa (3555 psi) for 5083-0 aluminum; C = a characteristic tank dimension that is the greatest of h, 0.75b, or 0.45 l; where: h = the height of the tank or the dimension in the vessel's vertical direction, in meters; b = the width of the tank or the dimension in the vessel's transverse direction; in meters; and l = the length of the tank or the dimension in the vessel's longitudinal direction, in meters; and ρ = the specific gravity of the cargo.
46:46:5.0.1.3.15.3.84.59	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.452 External pressure.	USCG		The design external pressure, P e , for an independent tank type C must be calculated by the following formula: P e = P 1 + P 2 + P 3 + P 4 where: 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. P 2 = 0, or the pressure relief valve setting for an enclosed space containing any portion of a pressure vessel. 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. P 4 = 0, or the external pressure from the head of water from any portion of the pressure vessel on exposed decks. where: 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. P 2 = 0, or the pressure relief valve setting for an enclosed space containing any portion of a pressure vessel. 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. P 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.450, § 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (b) If the Commandant (CG-ENG) specially approves an integral tank for a design temperature at atmospheric pressure lower than −10 °C (14 °F), the integral tank must have a complete secondary barrier that meets § 154.460. (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). (d) If Table 3 allows the hull to be a secondary barrier, the vessel's hull must: (1) Meet §§ 154.605 through 154.630; and (2) Be designed for the stresses resulting from the design temperature. Table 3—Secondary Barriers for Tanks 1 The hull may be a secondary barrier.
46:46:5.0.1.3.15.3.85.62	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.460 Design criteria.	USCG		At static angles of heel up through 30°, a secondary barrier must (a) If a complete secondary barrier is required in § 154.459, hold all of the liquid cargo in the cargo tank for at least 15 days under the dynamic loads in § 154.409(e); (b) If a partial secondary barrier is permitted in § 154.459, hold any leakage of liquid cargo corresponding to the extent of failure under § 154.448(a) after initial detection or primary barrier leak for at least 15 days under the dynamic loads in § 154.409(e); (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 (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.465 General.	USCG		If the design temperature is below −10 °C (14 °F), the cargo tank insulation must prevent the temperature of the vessel's hull from cooling below the minimum temperature allowed under § 154.172.
46:46:5.0.1.3.15.3.86.64	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (1) Any waters in the world, except Alaskan waters, for the ambient cold condition of: (i) Five knots air at −18 °C (0 °F); and (ii) Still sea water at 0 °C (32 °F); or (2) Alaskan waters for the ambient cold condition of: (i) Five knots air at −29 °C (20 °F); and (ii) Still sea water at −2 °C (28 °F). (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. (c) The insulation material must be designed for any loads transmitted from adjacent hull structure. (d) Insulation for cargo tank and piping must meet § 38.05-20 of this chapter. (e) Powder or granulated insulation must: (1) Not compact from vibrations of the vessel; (2) Maintain the thermal conductivity listed under § 154.467; and (3) Not exert a static pressure greater than the external design pressure of the cargo tank under § 154.408.
46:46:5.0.1.3.15.3.86.65	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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): (a) Compatibility with the cargo. (b) Solubility in the cargo. (c) Absorption of the cargo. (d) Shrinkage. (e) Aging. (f) Closed cell content. (g) Density. (h) Mechanical properties. (i) Thermal expansion. (j) Abrasion. (k) Cohesion. (l) Thermal conductivity. (m) Resistance to vibrations. (n) Resistance to fire and flame spread. (o) The manufacturing and installation details of the insulation including: (1) Fabrication; (2) Storage; (3) Handling; (4) Erection; and (5) Quality control.
46:46:5.0.1.3.15.3.87.66	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (1) prevents movement of the cargo tank under the static and dynamic loads in § 154.406; and (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. (b) The cargo tank support system must have a key that prevents rotation of the cargo tank. (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: (1) Empty; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.471 Design criteria.	USCG		(a) The cargo tank support system must be designed: (1) For the loads in § 154.406(a); (2) To not exceed the allowable stress under this part at a static angle of heel of 30°; (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 (4) For the largest resulting acceleration in Figure 1, including rotational and translation effects. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.500 Cargo and process piping standards.	USCG		The cargo liquid and vapor piping and process piping systems must meet the requirements in §§ 154.503 through 154.562, Subparts 56.01 through 56.35, §§ 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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) Offsets; (b) Loops; (c) Bends; (d) Mechanical expansion joints including: (1) Bellows; (2) Slip joints; (3) Ball joints; or (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 154.506 Mechanical expansion joint: Limits in a piping system.	USCG		Mechanical expansion joints in a piping system outside of a cargo tank: (a) May be installed only if offsets, loops or bends cannot be installed due to limited space or piping arrangement; (b) Must be a bellows type; and (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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 § 154.170.
46:46:5.0.1.3.15.3.88.73	46	Shipping	I	O	154	PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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. (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: (1) Both sides of the connection to the hull structure; or (2) Each side of the connection to the other side. (c) An electrical bond must be made by at least one of the following methods: (1) A metal bonding strap attached by welding or bolting. (2) Two or more bolts that give metal to metal contact between the bolts and the parts to be bonded. (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—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES	C	Subpart C—Design, Construction and Equipment	§ 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: (a) Each piping connection dismantled on a routine basis; (b) Cargo discharge and loading manifolds; and (c) Pump seals.

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