cfr_sections
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29 rows where part_number = 38 and title_number = 46 sorted by section_id
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| section_id ▼ | title_number | title_name | chapter | subchapter | part_number | part_name | subpart | subpart_name | section_number | section_heading | agency | authority | source_citation | amendment_citations | full_text |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 46:46:1.0.1.4.28.1.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.01 | Subpart 38.01—General | § 38.01-1 Scope of regulations—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 86-033, 53 FR 36024, Sept. 16, 1988] | (a) The regulations in this part contain requirements for the transportation of liquefied or compressed gases, whose primary hazard is one of flammability. (b) The transportation on deck of liquefied flammable gases in portable cylinders and tanks and the transportation of empty cylinders and portable tanks previously used shall be in accordance with the requirements of 49 CFR parts 171-179. The transportation of such containers under deck shall be in accordance with the requirements of § 38.01-2. | |||
| 46:46:1.0.1.4.28.1.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.01 | Subpart 38.01—General | § 38.01-2 Transportation of portable cylinders or portable tanks containing or having previously contained liquefied flammable gases in dry cargo spaces—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-32, 33 FR 5714, Apr. 12, 1968; CGD 74-125A, 47 FR 15231, Apr. 8, 1982; CGD 92-050, 59 FR 39666, Aug. 5, 1994] | (a) DOT cylinders, DOT Specification portable tanks or other approved portable tanks containing liquefied flammable gases may be transported under deck, provided the following requirements are met: (1) The cargo space shall be provided with efficient means of ventilation, be protected from artificial heat, and be readily accessible from hatches. (2) Containers shall be stored in such a position that the safety relief device is in communication with the vapor space of the container. They shall be properly stowed, dunnaged, and secured to prevent movement in any direction. (3) Unless a method acceptable to the Commandant is used, the containers shall not be overstowed in the same dry cargo space with other liquefied flammable gas containers, nor with other cargo. (4) The containers shall be suitably protected against physical damage from other cargo, ship's stores, or equipment in such spaces. (5) Cylinders shall have their valves protected at all times by one of the following methods: (i) By metal caps securely attached to the cylinders and of sufficient strength to protect the valves from injury. (ii) By having the valves recessed into the cylinders or otherwise protected so that they will not be subject to a blow if the cylinder is dropped on a flat surface. (6) Portable tanks shall have their valves protected at all times by a housing in accordance with the requirements under which they were manufactured. (7) Electrical circuits in the cargo spaces must meet the hazardous area requirements in subchapter J (Electrical Engineering Regulations) of this chapter. If an electrical circuit does not meet those requirements, it must be deenergized by a positive means and not reenergized until the cargo has been removed and the space has been tested and found free of flammable vapor. (8) During the stowage of portable cylinders or portable tanks in a hold or compartment that is not fitted with electrical fixtures meeting the hazardous area requirements of subchapter J (Electrical Engineering Regulations) of thi… | |||
| 46:46:1.0.1.4.28.1.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.01 | Subpart 38.01—General | § 38.01-3 Incorporation by reference. | USCG | [CGD 85-061, 54 FR 50962, Dec. 11, 1989, as amended by USCG-1999-6216, 64 FR 53224, Oct. 1, 1999; USCG-1999-5151, 64 FR 67177, Dec. 1, 1999] | (a) Certain standards and specifications are incorporated by reference into this part with the approval of the Director of the Federal Register in accordance with 5 U.S.C. 552(a). To enforce any edition other than the ones listed in paragraph (b) of this section, notice of change must be published in the Federal Register and the material made available to the public. All approved material is on file at 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. All material is available from the sources indicated in paragraph (b) of this section. (b) The standards and specifications approved for incorporation by reference in this part, and the sections affected, are: American Society for Nondestructive Testing (ASNT) 4153 Arlingate Road, Caller #28518, Columbus, OH, 43228-0518 ASNT “Recommended Practice No. SNT-TC-1A (1988), Personnel Qualification and Certification in Nondestructive Testing” 38.25-3(c)(2) American Society of Mechanical Engineers (ASME) International Three Park Avenue, New York, NY 10016-5990 ASME Boiler and Pressure Vessel Code Section V, Nondestructive Examination (1986) 38.25-3(a)(1) American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. ASTM D 4986-98, Standard Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials 38.05-20 4153 Arlingate Road, Caller #28518, Columbus, OH, 43228-0518 Three Park Avenue, New York, NY 10016-5990 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959. | |||
| 46:46:1.0.1.4.28.1.7.4 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.01 | Subpart 38.01—General | § 38.01-5 Certificate of inspection—TB/ALL. | USCG | (a) The certificate of inspection shall be endorsed for the carriage of liquefied flammable gases as follows: Inspected and approved for the carriage of liquefied flammable gases (1) at a pressure not to exceed ___ p.s.i., and (2) at temperatures not less than __ °F. Inspected and approved for the carriage of liquefied flammable gases (1) at a pressure not to exceed ___ p.s.i., and (2) at temperatures not less than __ °F. (b) Tanks approved to carry cargoes at below ambient temperatures shall have the applicable limiting temperatures indicated on the certificate. Tanks designed to carry cargoes only at ambient temperatures should have the word “ambient” entered in these spaces. | ||||
| 46:46:1.0.1.4.28.2.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-1 Design and construction of vessels—general—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18806, Dec. 18, 1968; CGFR 68-65, 33 FR 19985, Dec. 28, 1968; CGFR 70-10, 35 FR 3709, Feb. 25, 1970] | (a) Vessels designed for the carriage of liquefied gases shall comply with the applicable requirements of this subchapter. (b) Access and ventilation intakes to the machinery, accommodation and working spaces should be so arranged as to prevent the flow of cargo vapor from the weather deck into such spaces. In this respect openings in the forward or after ends of poops, forecastles, and deckhouses adjacent the cargo area shall be at least 24 inches above the cargo handling deck. (c) Materials used in the fabrication of cargo tanks and piping shall have adequate notch toughness at the service temperature. Where a secondary barrier is required, the material of that barrier and of contiguous hull structure shall have sufficient notch toughness at the lowest temperature which may result during the containment of leakage cargo within the secondary barrier. Materials used in the fabrication of the cargo containment and handling system shall satisfy the requirements for toughness specified in subchapter F (Marine Engineering) of this chapter. (d) Cargo tank spaces are to be isolated from the remainder of the vessel by cofferdams in accordance with § 32.60-10 of this subchapter. In a nonpressure vessel configuration, the void between the primary and secondary barriers shall not be acceptable as the required cofferdam between the tank spaces and the main machinery spaces. (e) Compartments containing cargo tanks or pipes shall be accessible from the weather deck only. No openings from these compartments to other parts of the vessel are permitted. (f) Barges utilized for the carriage of liquefied gases shall be of Type II barge hull as defined in § 32.63-5(b)(2) of this subchapter. The Commandant may, based on the properties of the liquefied gas to be carried, require a Type I barge hull, as defined in § 32.63-5(b)(1) of this subchapter, to ensure the hull is consistent with the degree and nature of the hazard of the liquefied gas to be carried. | |||
| 46:46:1.0.1.4.28.2.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-2 Design and construction of cargo tanks—general—TB/ALL. | USCG | (a) The maximum allowable temperature of the cargo is defined as the boiling temperature of the liquid at a pressure equal to the setting of the relief valve. (b) The service temperature is the minimum temperature at which cargo is loaded and/or transported in the cargo tank. However, the service temperature shall in no case be taken higher than given by the following formula: t s = t w −0.25( t w −t b ) (1) where: t s = Service temperature. t w = Boiling temperature of gas at normal working pressure of tank but not higher than + 32 °F. t b = Boiling temperature of gas at atmospheric pressure. where: t s = Service temperature. t w = Boiling temperature of gas at normal working pressure of tank but not higher than + 32 °F. t b = Boiling temperature of gas at atmospheric pressure. (c) Heat transmission studies, where required, shall assume the minimum ambient temperatures of 0 °F. still air and 32 °F. still water, and maximum ambient temperatures of 115 °F. still air and 90 °F. still water. (d) Cargo tanks in vessels in ocean; Great Lakes; lakes, bays, and sounds; or coastwise service shall be designed to withstand, simultaneously, the following dynamic loadings: (1) Rolling 30° each side (120°) in 10 seconds. (2) Pitching 6° half amplitude (24°) in 7 seconds. (3) Heaving L /80′ half amplitude ( L /20′) in 8 seconds. (e) Cargo tanks on barges shall be designed in accordance with § 32.63-25 of this subchapter. (f) Each liquefied flammable gas tank shall be provided with not less than a 15-inch by 23-inch or an 18-inch nominal diameter manhole fitted with a cover located above the maximum liquid level and as close to the top of the tank as possible. Where access trunks are fitted to the tanks, the nominal diameter of the trunks shall be not less than 30 inches. (g) Cargo tanks vented above 10 pounds per square inch gage shall be of the pressure vessel type. | ||||
| 46:46:1.0.1.4.28.2.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-3 Design and construction of pressure vessel type cargo tanks—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18806, Dec. 18, 1968] | (a) Cargo tanks of pressure vessel configuration (e.g. cylindrical, spherical, etc.) shall be designed, fabricated, inspected, and tested in accordance with the applicable requirements of part 54 of subchapter F (Marine Engineering) of this chapter, except as otherwise provided for in this part. (b) The requirements of this section anticipate that cargo tanks constructed as pressure vessels will, by themselves, constitute the cargo containment system and usually will not require a secondary barrier. (c) In the design of the tank, consideration shall be given to the possibility of the tank being subjected to external loads. Consideration shall also be given to excessive loads that can be imposed on the tanks by their support due to static and dynamic forces under operating conditions or during testing. The design shall show the manner in which the tanks are to be installed, supported, and secured, and shall be approved prior to tank installation. (d) Tanks with a service temperature of minus 20 °F. or lower and fabricated of ferritic materials shall be stress relieved. (e) Unlagged cargo tanks, where the cargo is transported, at or near ambient temperatures, shall be designed for the vapor pressure of the gas at 115 °F. The design shall also be based on the minimum internal pressure (maximum vacuum), plus the maximum external static head to which the tank may be subjected. Whenever surrounding cargo is at a greater temperature than the maximum allowable temperature of the liquefied flammable gas tanks, the liquefied flammable gas cargo is to be such that the design pressure of the liquefied flammable gas tank is not exceeded. (f) Where cargo tanks, in which the cargo is transported at or near ambient temperature, are lagged with an insulation material of a thickness to provide a thermal conductance of not more than 0.075 B.t.u. per square foot per degree Fahrenheit differential in temperature per hour, the tanks shall be designed for a pressure of not less than the vapor pressure of the gas at 105 °F. The ins… | |||
| 46:46:1.0.1.4.28.2.7.4 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-4 Design and construction of nonpressure vessel type cargo tanks—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18807, Dec. 18, 1968] | (a) The requirements in this section anticipate a cargo containment system consisting of a primary tank which is structurally self-supporting and, where required, a secondary barrier. Other vessel or cargo tank configurations, such as membrane type liners externally supported, will be considered upon submission of substantiating data, and based upon such additional tests as the Commandant may direct. (b) A secondary barrier is an arrangement or structure designed to contain the cargo temporarily if leakage develops in the primary container. A secondary barrier shall be provided where leakage from the primary container may cause lowering of the temperature of the ship's structure to an unsafe level. The secondary barrier shall be constructed of material suitable to contain the cargo at the service temperature. (c) The design of the cargo containment systems shall be such that under normal service conditions, or upon failure of the primary tank, the hull structure shall not be cooled down to a temperature which is unsafe for the materials involved. Structural members not suitable for the service temperatures of the cargo shall be protected by a secondary barrier consisting of suitable structural containment together with necessary associated insulation. Heat transmission studies and tests may be required to demonstrate that the arrangement is feasible and that the final material temperatures are acceptable. (d) The design and construction of the cargo tanks shall be at least equivalent to the standards established by the American Bureau of Shipping or other recognized classification society. For special tanks, or designs not contemplated by standards of the classification society, a detailed analysis of the entire tank, or designated parts thereof, shall be made and submitted to the Commandant for approval. (e) The cargo tank shall be designed for a head of cargo at least equal to the highest level the liquid cargo may attain plus the maximum venting pressure. In no case shall a head of cargo less than 4 feet a… | |||
| 46:46:1.0.1.4.28.2.7.5 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-5 Markings—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18807, Dec. 18, 1968] | (a)(1) Upon satisfactory completion of tests and inspection, pressure vessel and nonpressure vessel type cargo tanks, shall have markings as required by § 54.10-20 of subchapter F (Marine Engineering) of this chapter except that for nonpressure vessel type tanks, the Coast Guard number and pressure vessel class shall be omitted. (2) Hydrostatic test for pressure vessel type tanks shall be that specified in § 38.25-1(b). In the case of nonpressure vessel type tanks, the hydrostatic test pressure shall mean the pressure specified in § 38.25-1(d), while the maximum allowable pressure shall mean the maximum venting pressure as used in § 38.05-4(e). Where it is not feasible to attach the nameplate to the tank, it shall be conspicuously displayed nearby. (b) All tank inlet and outlet connections, except safety relief valves, liquid level gaging devices, and pressure gages, shall be labeled to designate whether they terminate in the vapor or liquid space. Labels of corrosion-resistant material may be attached to valves. (c) All tank markings shall be permanently and legibly stamped in a readily visible position, and shall not be obscured by painting. If the tanks are lagged, the markings attached to the tank proper shall be duplicated on a corrosion-resistant plate secured to the outside jacket of the lagging. | |||
| 46:46:1.0.1.4.28.2.7.6 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-10 Installation of cargo tanks—general—TB/ALL. | USCG | (a)(1) Cargo tanks shall be supported on foundations of steel or other suitable material and securely anchored in place to prevent the tanks from shifting when subjected to external forces. Each tank shall be so supported as to prevent the concentration of excessive loads on the supporting portions of the shell or head as prescribed under § 38.05-2(d). (2) Cargo tanks installed in barges shall comply with the requirements of § 32.63-25 of this subchapter. (b) Foundations, and stays where required, shall be designed for support and constraint of the weight of the full tank, and the dynamic loads imposed thereon. Thermal movement shall also be considered. (c) Foundations and stays which may be exposed to the cargo shall be suitable for the temperatures involved and be impervious to the cargo. (d) The design of the foundations and stays shall consider the resonance of the cargo tank, or parts thereof, and the vibratory forces, found in the tank vessel. If necessary, effective damping arrangements shall be provided. (e) Independent containment systems shall be so arranged as to provide a minimum clearance of not less than 24 inches from the vessel's side and not less than 15 inches from the vessel's bottom to provide access for inspection of the hull. Clearances for collision protection, where required by other parts of the regulations in this subchapter, may increase the clearances specified here. (1) For pressure vessel type tanks the distance between adjacent tanks and between tanks and vessel's structure shall be adequate to permit access for inspection and maintenance of all tank surfaces and hull structure as approved by the Commandant. Alternate provisions may be made for inspection and maintenance of the vessel's structure and tanks by moving such tanks or by providing equivalent acceptable means for remote inspection. (2) For nonpressure vessel type containment systems, access shall be arranged to permit inspection of one side each of the primary tank and secondary barrier, under normal shipyard condi… | ||||
| 46:46:1.0.1.4.28.2.7.7 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-20 Insulation—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by USCG-1999-5151, 64 FR 67177, Dec. 1, 1999] | (a) Where used, tank insulation shall satisfy the following requirements for combustibility, installation, and arrangement: (1) Insulation in a location exposed to possible high temperature or source of ignition shall be either: (i) Incombustible, complying with the requirements of subpart 164.009 of subchapter Q (Specifications) of this chapter; or, (ii) Self-extinguishing, as determined by ASTM D 4986, “Standard Test Method for Horizontal Burning Characteristics of Cellular Polymeric Materials,” (incorporated by reference, see § 38.01-3) and covered by a suitable steel cover. (2) Insulation in a location protected against possible ignition by enclosure in a tight steel envelope in which inert conditions are maintained need satisfy no requirement for combustibility except chemical stability. (3) Insulation in a location protected against possible high temperature or source of ignition by continuous surrounding structural voids or ballast tanks need satisfy no requirement for combustibility except chemical stability. (b) All insulation shall be of a vapor-proof construction, or have a vapor-proof coating of a fire-retardant material acceptable to the Commandant. Unless the vapor barrier is inherently weather resistant, tanks exposed to the weather shall be fitted with a removable sheet metal jacket of not less than 0.083-inch thick over the vapor-proof coating and flashed around all openings so as to be weathertight. Weather resistant coatings shall have sheet metal over areas subject to mechanical damage. (c) The insulation shall be adequately protected in areas of probable mechanical damage. (d) Insulation which forms an integral part of the secondary barrier shall meet the following additional requirements: (1) When the secondary barrier is called upon to contain the cargo, insulating material which is contacted shall not be affected by the cargo. Samples of the insulating material shall be tested in the cargo for solubility, absorption and shrinkage. The samples shall be checked for the above effects… | |||
| 46:46:1.0.1.4.28.2.7.8 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.05 | Subpart 38.05—Design and Installation | § 38.05-25 Refrigerated systems—TB/ALL. | USCG | (a) When a liquefied flammable gas is carried below atmospheric temperature under the requirements of § 38.05-3(f) or § 38.05-4, maintenance of the tank pressure below the maximum allowable pressure shall be provided by one or more of the following means: (1) A refrigeration or liquefication system which regulates the pressure in the tanks. A standby compressor or equivalent equipment, of a capacity equal to one of the working units shall be provided. (2) A system whereby the vapors are utilized as fuel for shipboard use. (3) A system allowing the liquefied flammable gas to warm up and increase in pressure. The insulation and tank design pressure shall be adequate to provide for a suitable margin for the operating time and temperatures involved. (4) Other systems acceptable to the Commandant. (b) A system whereby the vapors are vented to the atmosphere at sea only may be employed in conjunction with paragraph (a)(1) of this section. The pressure control valves shall be independent of the safety relief valves. See § 38.20-1(j). | ||||
| 46:46:1.0.1.4.28.3.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.10 | Subpart 38.10—Piping, Valves, Fittings, and Accessory Equipment | § 38.10-1 Valves, fittings, and accessories—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18807, Dec. 18, 1968] | (a) All valves, flanges, fittings, and accessory equipment shall be of a type suitable for use with liquefied flammable gases, and shall be made of steel or grade A malleable iron, acceptable for the service temperature and pressure according to the requirements of part 56 of subchapter F (Marine Engineering) of this chapter. Other materials may be specially considered and approved by the Commandant. (b) All valves, flanges, fittings, and accessory equipment shall have a pressure rating at operating temperatures not less than the maximum allowable pressure to which they may be subjected. Piping which is not protected by a relief valve or which can be isolated from its relief valve by other valves shall be designed for the greatest of the cargo vapor pressure at 115 °F., or the maximum allowable pressure of the cargo tank, or the requirements of § 38.10-10(a). Cargo liquid piping which may be subject to liquid full conditions shall be fitted with relief valves. The escape from piping systems relief valves shall be piped to a venting system or to a suitable vapor recovery system. Provision shall be made for the proper venting of all valves, fittings, etc., in which pressure buildup may occur, especially in refrigerated systems, because of an increase in product temperature. (c) Welded connections shall be used wherever possible with the number of flanged joints kept to the minimum necessary for assembly and cleaning. Sockets in sizes 3 inches and smaller and slipon flanges in sizes 4 inches and smaller may be used. Threaded joints may be used in sizes of 1 inch and smaller. Where threaded joints are used, they shall be visible and accessible for inspection under all service conditions, and limited to instrument and control lines properly valved from the main lines. Where threaded joints are sealed by brazing or welding, they need not be exposed. (d) Valve seat material, packing, gaskets, etc., shall be resistant to the action of the liquefied flammable gas. All flange and manhole cover gaskets shall be compresse… | |||
| 46:46:1.0.1.4.28.3.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.10 | Subpart 38.10—Piping, Valves, Fittings, and Accessory Equipment | § 38.10-5 Filling and discharge pipes—TB/ALL. | USCG | (a) Filling and discharge connections shall be provided with the manually operated valve required by § 38.10-1(i) and with a positive acting remote controlled quick-closing valve. The remote controlled quick-closing valve shall satisfy the requirements of § 38.10-1(j). (b) For pressure vessel type tanks the remote controlled quick-closing valves shall be located on the inside of the tank or on the outside where the piping enters the tank. For pressure vessel type tanks operating at low pressure and with service temperature near the cargo atmospheric boiling point, the Commandant may approve individual installations where these valves are located at the loading and discharge headers. (c) For nonpressure vessel type tanks the remote controlled quick-closing valves may be located at the loading and discharge headers. | ||||
| 46:46:1.0.1.4.28.3.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.10 | Subpart 38.10—Piping, Valves, Fittings, and Accessory Equipment | § 38.10-10 Cargo piping—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-82, 33 FR 18807, Dec. 18, 1968] | (a) The piping shall be designed for a working pressure of not less than the maximum pressure to which it may be subjected but in no case less than the design pressure of the cargo tanks. In the case of piping on the discharge side of the liquid pumps or vapor compressors, the design pressure shall not be less than the pump or compressor discharge relief valve setting; or, provided the piping is not protected by relief valves, the design pressure shall not be less than the total discharge head of the pump or compressor. (b) Piping subject to tank pressure shall be seamless drawn steel or electric resistance welded steel. Pipe used in refrigerated tank systems shall be of a material which is suitable for the minimum service temperature to which it may be subjected, according to the requirements of part 56 of subchapter F (Marine Engineering) of this chapter. (c) Piping shall be provided with adequate support to take the weight of the piping off valves and fittings and to prevent excessive vibration and stresses on tank connections. (d) For nonpressure vessel type tanks, the cargo handling arrangements and piping shall provide for emptying of a damaged tank, including cargo contained by a secondary barrier. | |||
| 46:46:1.0.1.4.28.3.7.4 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.10 | Subpart 38.10—Piping, Valves, Fittings, and Accessory Equipment | § 38.10-15 Safety relief valves—TB/ALL. | USCG | [CGFR 68-82, 33 FR 18807, Dec. 18, 1968, as amended by USCG-2014-0688, 79 FR 58280, Sept. 29, 2014] | (a) Each tank shall be fitted with or (subject to approval by the Commandant) connected to one or more safety relief valves designed, constructed and flow tested for capacity in conformance with subpart 162.017 or 162.018 of subchapter Q (Specifications) of this chapter. (b) Safety relief valves conforming to subpart 162.017 of subchapter Q (Specifications) of this chapter may be used on tanks for a maximum pressure of 10 pounds per square inch gage. Safety relief valves conforming to subpart 162.018 of subchapter Q (Specifications) of this chapter may be used for any pressure. (c) The safety relief valves shall have a combined relieving capacity to discharge the greater of the following with not more than 20 percent rise in pressure (in the tank) above the maximum allowable pressure: (1) The vapors evaporated by an ambient air temperature of 115 °F. plus the maximum flow rate of the cargo filling pipes or, (2) The vapors generated under fire exposure computed using the formulas of § 54.15-25(c) of subchapter F (Marine Engineering) of this chapter. (d) The safety relief valves shall meet the arrangement and inspection requirements of § 54.15-25 of subchapter F (Marine Engineering) of this chapter. (e) Means shall be provided to protect nonpressure vessel tanks from excessive external pressure. (f) Void spaces between the primary and secondary barriers of nonpressure vessel type tanks shall be protected by relief devices. The relief setting shall not be higher than the void test pressure, and shall not exceed 90 percent of the setting of the safety relief valve protecting the primary tank. | |||
| 46:46:1.0.1.4.28.3.7.5 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.10 | Subpart 38.10—Piping, Valves, Fittings, and Accessory Equipment | § 38.10-20 Liquid level gaging devices—TB/ALL. | USCG | (a) Each tank shall be fitted with a liquid level gaging device of approved design to indicate the maximum level to which the tank may be filled with liquid: (1) Between −20 °F. and 130 °F. for unrefrigerated service; or, (2) Within the operating temperature range for tanks operating below atmospheric temperature. (b) Liquid level gaging devices may be of the following types: Rotary tube, slip tube, magnetic, automatic float, or similar types approved by the Commandant. Except as otherwise provided in this section, fixed tube devices are not acceptable as the primary gaging device. (c) All gaging devices shall be arranged so that the maximum liquid level for product being carried, to which the tank may be filled is readily determinable. The maximum gallonage capacity as required by § 38.15-1 shall be: (1) Marked on the tank system nameplate or gaging device; or, (2) Shown in the ullage tables. (d) Gaging devices that require bleeding of the product to the atmosphere, such as the rotary tube, fixed tube, and slip tube, shall be so designed that the bleed valve maximum opening is not larger than a No. 54 drill size (0.055-inch diameter), unless provided with an excess flow valve. (e) For pressure vessel type tanks each automatic float, continuous reading tape or similar type gage not mounted directly on the tank or dome shall be fitted with a shutoff device located as close to the tank as practicable. When an automatic float gaging device, which gages the entire height of the tank is used, a fixed tube gage set in the range of 85 percent to 90 percent of the water capacity of the tank shall be provided in addition as a means of checking the accuracy of the automatic float, gage, or other alternate means acceptable to the Commandant may be used. (f) A gaging device shall be designed for a pressure at least equal to the maximum allowable pressure of the tank on which it is installed. (g) Gage glasses of the columnar type are prohibited. (h) Flat sight glasses may be used in the design of automatic float co… | ||||
| 46:46:1.0.1.4.28.4.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.15 | Subpart 38.15—Special Requirements | § 38.15-1 Filling of tanks—TB/ALL. | USCG | (a) Refrigerated and semirefrigerated tanks shall be filled so that there is an outage of at least 2 percent of the volume of the tank at the temperature corresponding to the vapor pressure of the cargo at the safety relief valve setting. A reduction in the required outage may be permitted by the Commandant when warranted by special design considerations. Normally then, the maximum volume to which a tank may be loaded is: V L = 0.98 d r V/d L where: V L = maximum volume to which tank may be loaded. V = volume of tank. d r = density of cargo at the temperature required for a cargo vapor pressure equal to the relief valve setting. d L = density of cargo at the loading temperature and pressure. where: V L = maximum volume to which tank may be loaded. V = volume of tank. d r = density of cargo at the temperature required for a cargo vapor pressure equal to the relief valve setting. d L = density of cargo at the loading temperature and pressure. (b) Nonrefrigerated tanks shall be filled so that their filling densities shall not exceed the ratios indicated in table 38.15-1(b). (c) The “filling density” is defined as the percent ratio of the weight of the gas in a tank to the weight of water the tank will hold at 60 °F. Table 38.15-1( b )—Maximum Permissible Filling Densities for Tanks Operating At or Near Ambient Temperature Note: Increase in filling densities to provide for seasonal changes may be considered by the Commandant upon presentation of factual evidence that safe operation can be effected. | ||||
| 46:46:1.0.1.4.28.4.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.15 | Subpart 38.15—Special Requirements | § 38.15-5 Cargo hose—TB/ALL. | USCG | (a) When the liquid and vapor line hoses used for loading and discharging the cargo are carried on board the vessel, they shall be of flexible metal and fabricated of seamless steel pipe and flexible joints of steel or bronze, or of other suitable material resistant to the action of the cargo. Hose used in refrigerated systems shall be suitable for the minimum temperature to which it may be subjected and shall be acceptable to the Commandant. (b) Hose subject to tank pressure, or the discharge pressure of pumps or vapor compressors, shall be designed for a bursting pressure of not less than five times the maximum safety relief valve setting of the tank, pump, or compressor. (c) Before being placed in service each new cargo hose, with all necessary fittings attached, shall be hydrostatically tested by its manufacturer to a pressure not less than twice its maximum working pressure nor more than two-fifth its bursting pressure. The hose shall be marked with its maximum working pressure, and if used in refrigerated service, its minimum temperature. | ||||
| 46:46:1.0.1.4.28.4.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.15 | Subpart 38.15—Special Requirements | § 38.15-10 Leak detection systems—T/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-65, 33 FR 19985, Dec. 28, 1968] | (a) A detection system shall be permanently installed to sense cargo leaks. The detectors shall be located within the space so as to permit the sensing of an initial leak and prevent an undetected gas accumulation. The sensitivity shall be in accordance with paragraph (b) of this section. The detectors shall be fitted in the following compartments: (1) Between the primary and secondary barriers for nonpressure vessel type tanks. (2) Cargo handling rooms and spaces containing cargo piping or cargo handling systems. (3) All enclosed spaces, except tanks and cofferdams, which are separated from the cargo tanks by only the secondary barrier. (4) Other spaces where gas concentrations might be expected. (5) Cargo holds, containing pressure vessel type tanks and no cargo piping, are exempt from the requirements of this paragraph. (b) The indicating instruments for the detection system shall be located on the bridge or at the cargo control station. An audio and visual warning shall be given before any gas concentration reaches 30 percent of the lower explosive limit. The alarm shall indicate both on the bridge and at the cargo control station. Sampling of each detector shall be at least once every half hour. (c) Means shall be provided to measure the full range of cargo gas concentration in the spaces. | |||
| 46:46:1.0.1.4.28.4.7.4 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.15 | Subpart 38.15—Special Requirements | § 38.15-15 Electrical installations—TB/ALL. | USCG | (a) All electrical installations shall comply with the requirements contained in this subchapter and in subchapter J (Electrical Engineering) of this chapter for tank vessels, except as otherwise specified in this part. (b) Spaces containing cargo pumps, compressors, and piping are considered as equivalent to a tank vessel pumproom, and no electrical devices, except Coast Guard approved intrinsically safe devices, shall be installed in these spaces. Electric motors shall be segregated from these spaces by a gastight bulkhead. Electric lighting of the explosion-proof type may be installed in these spaces provided all switching is done from outside the space. (c) All cargo tanks, piping, valves, etc., shall be effectively grounded to the vessel's hull. Tanks with an insulated inner shell (primary barrier) shall have an effective grounding bond to the outer shell (secondary barrier) or to the vessel's hull. (d) Electric submerged motor cargo pumps may be used, when in compliance with the following requirements and subject to approval by the Commandant. (1) Design details of the submerged motor pump, with an evaluation of the cooling efficiency of the product being pumped, shall be submitted. (2) Provisions shall be made to exclude air from the tanks containing cargo in either vapor or liquid phase. The pump motor shall be deenergized when this condition is not satisfied. (3) A liquid level sensing device shall automatically shut down the motor and sound an alarm at a predetermined low liquid level. The alarm location may be the station from which cargo handling is controlled or such other location outside the cargo area as is acceptable to the Commandant. (4) Details of the power cable, tank penetrations and pump connections shall be submitted. (5) An auxiliary means of emptying the cargo tanks shall be provided in accordance with § 38.10-10(d). (6) Means for positively disconnecting the power supply between the switchboard and the pump power panel shall be provided, i.e., disconnect links, lockable breaker… | ||||
| 46:46:1.0.1.4.28.4.7.5 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.15 | Subpart 38.15—Special Requirements | § 38.15-20 Remote shutdowns—TB/ALL. | USCG | (a) All machinery associated with cargo loading, unloading, or cooling shall be capable of being shut down from a remote location. This location may be the station from which the cargo handling is controlled or such other location outside the cargo area as is acceptable to the Commandant. (b) [Reserved] | ||||
| 46:46:1.0.1.4.28.5.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.20 | Subpart 38.20—Venting and Ventilation | § 38.20-1 Venting—T/ALL. | USCG | (a) Each safety relief valve installed on a cargo tank shall be connected to a branch vent of a venting system which shall be constructed so that the discharge of gas will be directed vertically upward to a point which shall extend to a height above the weather deck equal to at least one-third the beam of the vessel and to a minimum of at least 10 feet, and shall terminate at a comparable distance from any other living or working space, ventilator inlet, or source of vapor ignition. When special conditions will prevent the vent line header outlets being permanently installed at a height above the deck of one-third the beam of the vessel, then an adjustable system shall be provided which, when extended vertically, shall be capable of reaching a height of one-third the beam of the vessel. (b) The capacity of branch vents or vent headers shall depend upon the number of cargo tanks connected to such branch or header as provided for in the table 38.20-1(b), and upon the total safety relief valve discharge capacity. Table 38.20-1( b )—Capacity of Branch Vents or Vent Headers (c) In addition to the requirements specified in paragraphs (a) and (b) of this section, the size of the branch vents or vent headers, shall be such that the back pressure in the relief valve discharge lines shall not be more than 10 percent of the safety relief valve setting. In nonpressure vessel vent systems, however, where the maximum back pressure of 10 percent of the relief valve setting is insufficient to move the gases through any but an extremely large diameter vent pipe, the back pressure may exceed 10 percent provided: (1) The pressure in the tank during venting does not exceed 120 percent of the tank maximum allowable pressure; and, (2) The safety relief valve is sized to discharge the required capacity with the tank pressure and vent back pressure actually used. (d) Return bends and restrictive pipe fittings are not permitted. (e) Vents and headers shall be so installed as to prevent excessive stresses on safety relief valve mou… | ||||
| 46:46:1.0.1.4.28.5.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.20 | Subpart 38.20—Venting and Ventilation | § 38.20-5 Venting—T/ALL. | USCG | (a) Safety relief valves on cargo tanks in barges may be connected to individual or common risers which shall extend to a reasonable height above the deck. An alternate arrangement consisting of a branch vent header system as required by § 38.20-1 may be installed. In any case, the provisions of § 38.20-1 (d) through (j) shall apply. (b) Arrangements providing for venting cargo tanks at sea on unmanned barges will be considered by the Commandant upon presentation of plans. | ||||
| 46:46:1.0.1.4.28.5.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.20 | Subpart 38.20—Venting and Ventilation | § 38.20-10 Ventilation—T/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGFR 68-65, 33 FR 19985, Dec. 28, 1968] | (a) A power ventilation system shall be provided for compartments containing pumps, compressors, pipes, control spaces, etc. connected with the cargo handling facilities. These compartments shall be ventilated in such a way as to remove vapors from points near the floor level or bilges, or other areas where vapor concentrations may be expected. The compartments shall be equipped with power ventilation of the exhaust type having capacity sufficient to effect a complete change of air in not more than 3 minutes equal to the volume of the compartment and associated trunks. (b) The power ventilation units shall not produce a source of vapor ignition in either the compartment or the ventilation system associated with the compartment. Inlets to exhaust ducts shall be provided and located at points where concentrations of vapors may be expected. Ventilation from the weather deck shall be provided. Ventilation outlets shall terminate away from any openings to the interior part of the vessel a lateral distance at least equal to that specified in § 38.20-1(a). These outlets shall be so located as to minimize the possibility of recirculating contaminated air through the compartment. (c) Means shall be provided for purging the following spaces of cargo vapors: (1) The space surrounding nonpressure vessel type tanks, i.e., within the secondary barrier. (2) The space surrounding pressure-vessel type tanks whose piping connections are below the weather deck in accordance with § 38.10-1(h). (3) The space surrounding tanks whose manhole openings are below the weather deck in accordance with § 38.05-10(f). (d) Power ventilation shall be provided for each auxiliary machinery or working space located on and accessible from the cargo handling deck. Such ventilation systems shall be designed to preclude the entry of cargo vapors into the space via the open access or the ventilation system itself. | |||
| 46:46:1.0.1.4.28.6.7.1 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.25 | Subpart 38.25—Periodic Tests and Inspections | § 38.25-1 Tests and inspections—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 85-061, 54 FR 50962, Dec. 11, 1989; USCG-2014-0688, 79 FR 58280, Sept. 29, 2014] | (a) Each tank shall be subjected to the tests and inspections described in this section in the presence of a marine inspector, except as otherwise provided in this part. (1) An internal inspection of the tank is conducted within— (i) Ten years after the last internal inspection if the tank is a pressure vessel type cargo tank on an unmanned barge carrying cargo at temperatures of −67 °F (−55 °C) or warmer; or (ii) Eight years after the last internal inspection if the tank is of a type other than that described in paragraph (a)(1)(i) of this section. (2) An external examination of unlagged tanks and the visible parts of lagged tanks shall be made at each inspection for certification and at such other times as considered necessary. (3) The owner shall ensure that the amount of insulation deemed necessary by the marine inspector is removed from insulated tanks during each internal inspection to allow spot external examination of the tanks and insulation, or the thickness of the tanks may be gauged by a nondestructive means accepted by the marine inspector without the removal of insulation. (4) If required by the Officer in Charge, Marine Inspection, the owner shall conduct nondestructive testing of each tank in accordance with § 38.25-3. (5) If the tank is a pressure vessel type cargo tank with an internal inspection interval of 10 years, is 30 years old or older, determined from the date it was built, the owner shall conduct nondestructive testing of that tank, in accordance with § 38.25-3, during each internal inspection. (b) If the marine inspector considers a hydrostatic test necessary to determine the condition of the tank, the owner shall perform the test at a pressure of 1 1/2 times the tank's— (1) Maximum allowable pressure, as determined by the safety relief valve setting; or (2) Design pressure, when cargo tanks operate at maximum allowable pressures reduced below the design pressure in order to satisfy special mechanical stress relief requirements. See the ASME Code, section VIII, appendix 3 … | |||
| 46:46:1.0.1.4.28.6.7.2 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.25 | Subpart 38.25—Periodic Tests and Inspections | § 38.25-3 Nondestructive testing—TB/ALL. | USCG | [CGD 85-061, 54 FR 50963, Dec. 11, 1989] | (a) Before nondestructive testing may be conducted to meet § 38.25-1 (a)(4) and (a)(5), the owner shall submit a proposal to the Officer in Charge, Marine Inspection for acceptance that includes— (1) The test methods and procedures to be used, all of which must meet section V of the ASME Boiler and Pressure Vessel Code (1986); (2) Each location on the tank to be tested; and (3) The test method and procedure to be conducted at each location on the tank. (b) If the Officer in Charge, Marine Inspection rejects the proposal, the Officer in Charge, Marine Inspection informs the owner of the reasons why the proposal is rejected. (c) If the Officer in Charge, Marine Inspection accepts the proposal, then the owner shall ensure that— (1) The proposal is followed; and (2) Nondestructive testing is performed by personnel meeting ASNT “Recommended Practice No. SNT-TC-1A (1988), Personnel Qualification and Certification in Nondestructive Testing.” (d) Within 30 days after completing the nondestructive test, the owner shall submit a written report of the results to the Officer in Charge, Marine Inspection. | |||
| 46:46:1.0.1.4.28.6.7.3 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.25 | Subpart 38.25—Periodic Tests and Inspections | § 38.25-5 Removal of defective tanks—TB/ALL. | USCG | If a tank fails to pass the tests prescribed in this subpart, it shall be removed from service unless otherwise authorized by the Commandant. | ||||
| 46:46:1.0.1.4.28.6.7.4 | 46 | Shipping | I | D | 38 | PART 38—LIQUEFIED FLAMMABLE GASES | 38.25 | Subpart 38.25—Periodic Tests and Inspections | § 38.25-10 Safety relief valves—TB/ALL. | USCG | [CGFR 66-33, 31 FR 15269, Dec. 6, 1966, as amended by CGD 95-027, 61 FR 26000, May 23, 1996] | (a) The cargo tank safety relief valves shall be inspected at least once in every 2 years. (b) The safety relief valve discs must be lifted from their seats in the presence of a marine inspector by either liquid, gas, or vapor pressure at least once every 5 years to determine the accuracy of adjustment and, if necessary, must be reset. |
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title_number INTEGER,
title_name TEXT,
chapter TEXT,
subchapter TEXT,
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