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National
United States Regulations
46 CFR PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES

Title 46: Shipping




PART 151—BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES



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Authority: 33 U.S.C. 1903; 46 U.S.C. 3703; Department of Homeland Security Delegation No. 0170.1.

Source: CGFR 70–10, 35 FR 3714, Feb. 25, 1970, unless otherwise noted.

Subpart 151.01—General
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§ 151.01-1 Applicability.
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This part applies to the following:

(a) Oceangoing, as defined in 33 CFR 151.05(j), non-self-propelled United States ships and non-self-propelled foreign ships operating in United States waters that carry a bulk cargo that is—

(1) Listed in Table 151.05;

(2) Not being carried in a portable tank regulated under subpart 98.30 or 98.33 of this chapter; and

(3) Not an NLS or is an NLS cargo that is a Category D listed in §151.12–5 of this part.

(b) All non-self-propelled United States ships that are not oceangoing that carry a bulk cargo that is—

(1) Listed in Table 151.05, and

(2) Not being carried in a portable tank regulated under subpart 98.30 or 98.33 of this chapter.

[CGD 81–101, 52 FR 7776, Mar. 12, 1987, as amended by CGD 84–043, 55 FR 37413, Sept. 11, 1990]

§ 151.01-2 Incorporation by reference.
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(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), and is available from the sources indicated in paragraph (b) of this section. 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 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 num;28518, Columbus, OH 43228–0518

ASNT “Recommended Practice No. SNT-TC-1A (1988), Personnel Qualification and Certification in Nondestructive Testing” 151.04–7(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) 151.04–7(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 151.15–3 ASTM E 84–98, Standard Test Method for Surface Burning Characteristics of Building Materials—151.15–3

[CGD 85–061, 54 FR 50965, Dec. 11, 1989, as amended by USCG–1999–6216, 64 FR 53227, Oct. 1, 1999; USCG–1999–5151, 64 FR 67183, Dec. 1, 1999; 69 FR 18803, Apr. 9, 2004]

§ 151.01-3 [Reserved]
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§ 151.01-5 [Reserved]
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§ 151.01-10 Application of vessel inspection regulations.
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(a) The regulations in this part are requirements which may be in addition to, supplement, or modify requirements in other subchapters in this chapter. When a specific requirement in another part or section in another subchapter in this chapter is in conflict with or contrary to requirement or intent expressed in this part, the regulations in this part shall take precedence.

(b) Every unmanned tank barge which carries or is intended to carry in bulk any liquid or liquefied gas listed in Table 151.05 and has flammability or combustibility characteristics as indicated by a fire protection requirement in Table 151.05 shall be inspected and certificated under the provisions in subchapter D (Tank Vessels) of this chapter and the regulations in this part.

(c) Every unmanned tank barge prior to the carriage in bulk of any liquid or liquefied gas listed in Table 151.05 which does not have the flammability or combustibility characteristics as indicated by the fire protection requirement in Table 151.05 shall be inspected and certificated under the applicable provisions of subchapter D or subchapter I of this chapter, at the option of the barge owner, in addition to the regulations in this part. However, unless the barge owner notifies the Officer in Charge, Marine Inspection of his option to have the barge inspected and certificated under subchapter I at the time he submits the application for inspection (Form CG–3752), the unmanned tank barge shall be inspected and certificated under the provisions of subchapter D of this chapter and the regulations in this part.

(c–1) Each unmanned tank barge constructed on or after September 6, 1977, that carries in bulk a cargo listed in Table 151.05 and that is certificated under subchapter I of this chapter must meet the loading information requirements in §31.10–32 of this chapter.

(d) The provisions of subchapter D of this chapter shall apply to all unmanned tank barges which carry in bulk any of the liquids or liquefied gases listed in Table 30.25–1 of this chapter. The provisions of this part shall not apply to such barges unless it is also desired to carry one or more of the liquids or liquefied gases listed in Table 151.05.

(e) Manned barges which carry or intend to carry in bulk the cargoes specified in Table 151.05 will be considered individually by the Commandant and may be required to meet the requirements of this subchapter and of subchapter D (Tank Vessels) or I (Cargo and Miscellaneous Vessels) of this chapter as applicable.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970]

Editorial Note: For Federal Register citations affecting §151.01–10, see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and on GPO Access.

§ 151.01-15 Dangerous cargoes not specifically named.
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(a) Any liquid or liquefied gas, which meets the definitions referred to in §151.01–1 and is not named in Table 151.05 or Table 30.25–1 of this chapter shall not be transported in bulk in a manned or unmanned tank barge without the prior specific approval of the Commandant.

(b) Mixtures or blends of two or more cargoes, one or more of which appears in Table 151.05, will be treated as though they were new products and specific approval of the Commandant must be obtained prior to undertaking their transportation.

[CGFR–70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 81–101, 52 FR 7777, Mar. 12, 1987; CGD 81–101, 53 FR 28974, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989; CGD 88–100, 54 FR 40029, Sept. 29, 1989]

§ 151.01-20 Use of minimum requirements.
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(a) The minimum requirements governing transportation of any liquid or liquefied gas listed in Table 151.05 are set forth in this part when such substances are carried in bulk in unmanned tank barges.

(b) Before any liquid or liquefied gas listed in Table 151.05 may be carried in an unmanned tank barge, the certificate of inspection issued to such barge shall be appropriately endorsed to show approval to transport such cargo.

[CFGR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88–100, 54 FR 40029, Sept. 29, 1989]

§ 151.01-25 Existing barges.
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(a) Except as provided in paragraph (c) of this section, barges certified for, or used within the previous 2 years prior to the effective date of this regulation, or barges equivalent to such barges, for the transportation of any cargo regulated by this subchapter which do not meet the specific requirements herein, may be continued in service subject to the following conditions:

(1) Venting, gauging, and all operating requirements shall be met within a 1–year period subsequent to the effective date.

(2) All other requirements shall be met within a 2–year period subsequent to the effective date.

(b) If an existing barge, which has been designed to carry or has regularly been carrying one or more of the cargoes regulated by this subchapter, is found to be so arranged, or outfitted that conversion to bring it into compliance with any or all of the requirements of this subchapter is impractical or impossible, the Commandant, upon application, may review the plans of the barge to determine if it is suitable and safe for the cargoes to be transported.

(c) Except for operating and vinyl chloride requirements, barges constructed and certificated for the transportation of any cargo for which specific regulations existed, in parts 36, 38, 39, 40, and 98 of this chapter at the time of their construction or conversion, may continue and will be certificated to operate without the requirement that they comply with the provisions of subchapter O of this chapter.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 74–167k, 40 FR 17026, Apr. 16, 1975]

§ 151.01-30 Effective date.
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(a) The regulations in this subchapter are effective on and after June 1, 1970. However, amendments, revisions, or additions shall become effective ninety (90) days after the date of publication in the Federal Register unless the Commandant shall fix a different time.

(b) The regulations in this subchapter are not retroactive in effect unless specifically made so at the time the regulations are issued. Changes in specification requirements of articles of equipment, or materials used in construction of tank barges, shall not apply to such items which have been passed as satisfactory until replacement shall become necessary, unless a specific finding is made that such equipment or materials used is unsafe or hazardous and has to be removed from tank barges.

§ 151.01-35 Right of appeal.
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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.

[CGD 88–033, 54 FR 50381, Dec. 6, 1989]

Subpart 151.02—Equivalents
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§ 151.02-1 Conditions under which equivalents may be used.
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(a) Where in this part it is provided that a particular fitting, material, appliance, apparatus, or equipment, or type thereof, shall be fitted or carried in a vessel, or that any particular provision shall be made or arrangement including cargo segregation shall be adopted, the Commandant may accept in substitution therefor any other fitting, material, apparatus or equipment, or type thereof, or any other provision or arrangement. However, the Commandant shall be satisfied by suitable evidence that the fitting, material, appliance, apparatus, or equipment, or the type thereof, or the provision or arrangement shall be at least as effective as that specified in this part.

(b) In any case where it is shown to the satisfaction of the Commandant that the use of any particular equipment, apparatus, or arrangement not specifically required by law is unreasonable or impracticable, the Commandant may permit the use of alternate equipment apparatus, or arrangement to such an extent and upon such conditions as will insure, to his satisfaction, a degree of safety consistent with the minimum standards set forth in this part.

§ 151.02-5 Design of unmanned barges.
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(a) In order not to inhibit design and application, the Commandant may approve vessels of novel design, both new and for conversion, after it is shown to his satisfaction that such a vessel is at least as safe as any vessel which meets the standards required by this part.

(b) [Reserved]

Subpart 151.03—Definitions
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§ 151.03-1 Definitions of terms.
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Certain terms used in the regulations in this subchapter are defined in this subpart.

§ 151.03-3 Angle of downflooding.
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The angle of heel of the vessel at which any opening in the hull not provided with a water tight closure would be immersed.

§ 151.03-5 Approved.
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This term means approved by the Commandant unless otherwise stated.

§ 151.03-7 Barge.
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This term means any non-self-propelled vessel designed to carry cargo.

§ 151.03-9 Cargo.
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This term means any liquid, gas or solid having one or more of the dangerous properties defined in this subchapter.

§ 151.03-11 Coastwise.
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This designation refers to all vessels normally navigating the waters of any ocean or the Gulf of Mexico 20 nautical miles or less offshore.

§ 151.03-13 Cofferdam.
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This term means a void or empty space separating two or more compartments for the purpose of isolation or to prevent the contents of one compartment from entering another in the event of the failure of the walls of one to retain their tightness.

§ 151.03-15 Commandant.
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This term means Commandant of the U.S. Coast Guard.

§ 151.03-17 Compatible.
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Compatible means that a cargo will not react in an unsafe manner with other cargo or materials used in construction of the barge. The prime considerations are the chemical, physical, or thermal properties of the reaction including heat, pressure, toxicity, stability, and explosive nature of the reaction and its end products.

§ 151.03-19 Environment.
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This term refers to the atmosphere within a cargo tank and the spaces adjacent to the tank or spaces in which cargo is handled.

§ 151.03-21 Filling density.
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The ratio, expressed as a percentage, of the weight of cargo that may be loaded into a tank compared to the weight of water that the tank will hold at 60 °F. The weight of a gallon of water at 60 °F in air shall be 8.32828 pounds.

§ 151.03-23 Flame arrestor.
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Any device or assembly of cellular, tubular, pressure or other type used for preventing the passage of flames into enclosed spaces.

§ 151.03-25 Flame screen.
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A fitted single screen of corrosion-resistant wire of at least 30 by 30 mesh or two fitted screens, both of corrosion-resistant wire, of at least 20 by 20 mesh spaced not less than one-half inch or more than 1 1/2 inches apart.

§ 151.03-27 Gas free.
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Free from dangerous concentrations of flammable or toxic gases.

§ 151.03-29 Great Lakes.
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A designation for all vessels in Great Lakes service.

§ 151.03-30 Hazardous material.
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In this part hazardous material means a liquid material or substance that is—

(a) Flammable or combustible;

(b) Designated a hazardous substance under section 311(b) of the Federal Water Pollution Control Act (33 U.S.C. 1321); or

(c) Designated a hazardous material under 49 U.S.C. 5103.

Note: The Environmental Protection Agency designates hazardous substances in 40 CFR Table 116.4A. The Coast Guard designates hazardous materials that are transported as bulk liquids by water in §153.40.

[CGD 81–101, 52 FR 7777, Mar. 12, 1987, as amended by CGD 95–028, 62 FR 51209, Sept. 30, 1997]

§ 151.03-31 Headquarters.
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The Office of the Commandant, U.S. Coast Guard, Washington, DC 20593–0001.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88–070, 53 FR 34535, Sept. 7, 1988]

§ 151.03-33 Lakes, bays, and sounds.
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A designation for all vessels navigating the waters of any of the lakes, bays, or sounds other than the waters of the Great Lakes.

§ 151.03-35 Limiting draft.
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Maximum allowable draft to which a barge may be loaded. Limiting draft is a function of hull type and cargo specific gravity. A barge may be assigned different limiting drafts for different hull types or within one hull type for different specific gravities.

§ 151.03-36 Liquid.
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In this part liquid includes liquefied and compressed gases.

[CGD 81–101, 52 FR 7777, Mar. 12, 1987]

§ 151.03-37 Maximum allowable working pressure.
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The maximum allowable working pressure shall be as defined in section VIII of the ASME Boiler and Pressure Vessel Code.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85–061, 54 FR 50965, Dec. 11, 1989]

§ 151.03-38 Nondestructive testing.
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Nondestructive testing includes ultrasonic examination, liquid penetrant examination, magnetic particle examination, radiographic examination, eddy current, and acoustic emission.

[CGD 85–061, 54 FR 50965, Dec. 11, 1989]

§ 151.03-39 Ocean.
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A designation for all vessels normally navigating the waters of any ocean or the Gulf of Mexico more than 20 nautical miles offshore.

§ 151.03-41 Officer in Charge, Marine Inspection (OCMI).
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This term means any person from the civilian or military branch of the Coast Guard designated as such by the Commandant and who, under the superintendence and direction of the Coast Guard District Commander, is in charge of an inspection zone for the performance of duties with respect to the enforcement and administration of Subtitle II of Title 46, U.S. Code, Title 46 and Title 33 U.S. Code, and regulations issued under these statutes.

[CGD 95–028, 62 FR 51209, Sept. 30, 1997]

§ 151.03-43 Pressure.
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Terminology used in this part are: pounds per square inch gauge (p.s.i.g.) or pounds per square inch absolute (p.s.i.a.). 14.7 p.s.i.a. is equal to 0 p.s.i.g. P.s.i.g. is normally used in reference to design or operating requirements.

§ 151.03-45 Rivers.
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A designation for all vessels whose navigation is restricted to rivers and/or canals, exclusively.

§ 151.03-47 Service.
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The waters upon which a vessel may be operated as endorsed upon the certificate of inspection.

§ 151.03-49 Sounding tube.
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This is an unperforated tube fitted to an ullage hole, secured so as to be vapor tight to the underside of the tank top open at the bottom, and extending to within 18 inches or less of the bottom of the tank.

§ 151.03-51 Tank barge.
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A non-self-propelled vessel especially constructed or converted to carry bulk liquid cargo in tanks.

§ 151.03-53 Tankerman.
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The following ratings are established in part 13 of this chapter. The terms for the ratings identify persons holding valid merchant mariners' documents for service in the ratings issued under that part:

(a) Tankerman-PIC.

(b) Tankerman-PIC (Barge).

(c) Restricted Tankerman-PIC.

(d) Restricted Tankerman-PIC (Barge).

(e) Tankerman-Assistant.

(f) Tankerman-Engineer.

[CGD 79–116, 60 FR 17157, Apr. 4, 1995]

§§ 151.03-55 [Reserved]
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Subpart 151.04—Inspection and Certification
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§ 151.04-1 Certificate of inspection.
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(a) A certificate of inspection is required for every unmanned tank barge subject to the requirements in this subchapter. A certificate of inspection shall be issued to the barge or to its owners by the Officer in Charge, Marine Inspection, if the barge is found to comply with applicable inspection laws and the regulations in this chapter.

(b) The certificate of inspection shall be endorsed with respect to the waters over which the barge may be operated.

(c) The certificate shall be endorsed describing the cargoes by name as given in Table 151.05 or as specifically approved by the Commandant. No other dangerous cargo as defined in Subpart 151.01–1 shall be carried. Certificates shall specify maximum cargo weight (short tons), maximum density (pounds per gallon) and any operating limitations and a limiting draft.

[CFGR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88–100, 54 FR 40029, Sept. 29, 1989]

§ 151.04-2 Inspection required.
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(a) Every unmanned tank barge subject to the regulations in this subchapter shall be inspected biennially. More frequent inspections may be required, if necessary, by the Officer in Charge, Marine Inspection, to see that the hull, equipment and appliances of the vessel comply with the marine inspection laws, and the regulations of this subchapter and other subchapters where applicable.

(b) [Reserved]

§ 151.04-3 Initial inspection.
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(a) The initial inspection which may consist of a series of inspections during the construction of an unmanned barge shall include a complete inspection of the structure, auxiliary machinery, and equipment. The inspection shall be such as to insure that the arrangement, materials, and scantlings of the hull structure, tanks and pressure vessels and their appurtenances comply with applicable regulations of this chapter and with the requirements of this part.

(b) [Reserved]

§ 151.04-5 Inspection for certification.
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(a) An inspection for certification is a prerequisite of the reissuance of a Certificate of Inspection as provided for in applicable regulations of this chapter.

(b) Unless otherwise specified in table 151.05, cargo tanks are internally examined as follows:

(1) Where the cargo tank is of the gravity type and the structural framing is on the internal tank surface, the tank shall be inspected internally at the time of inspection for certification.

(2) Where the cargo tank is of the gravity type and the structural framing is on the external tank surface accessible for examination from voids, cofferdams, double bottoms, and other similar spaces, tanks shall be inspected internally at 4–year intervals.

(3) If the tank is a pressure-vessel type cargo tank, an internal inspection of the tank is conducted within—

(i) Ten years after the last internal inspection 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 a pressure type cargo tank carrying cargo at temperatures colder than -67 °F (-55 °C).

(4) Internal inspection may be required at more frequent intervals as deemed necessary by the Officer in Charge, Marine Inspection.

(c) An external examination of unlagged tanks and the visible parts of lagged tanks is made at each biennial inspection. If the vessel has single skin construction, the underwater portion of the tank need not be examined unless deemed necessary by the Officer in Charge, Marine Inspection. If an external examination of the tank is not possible because of insulation, the owner shall ensure that—

(1) The amount of insulation deemed necessary by the marine inspector is removed during each cargo tank internal inspection to allow spot external examination of the tanks and insulation; or

(2) The thickness of the tanks is gauged by a nondestructive means accepted by the marine inspector without the removal of insulation.

(d) If required by the Officer in Charge, Marine Inspection the owner shall conduct nondestructive testing of each tank designated by the Officer in Charge, Marine Inspection in accordance with §151.04–7.

(e) If the Officer in Charge, Marine Inspection considers a hydrostatic test necessary to determine the condition of the tanks, 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.

Note: See the ASME Code, Section VIII, Appendix 3 for information on design pressure.

(f) Quick closing valves shall be tested by operating the emergency shutoff system from each operating point at the time of each vessel's inspection for certification.

(g) Excess flow valves shall be inspected at the time of inspection for certification. The Officer in Charge, Marine Inspection, shall satisfy himself that the valve is in working condition by visual inspection, and if this is impossible, by one of the following means:

(1) Removing the valve and bench testing ashore; the valve shall close at or below its rated closing flow.

(2) By any other means acceptable to the Officer in Charge, Marine Inspection, which will demonstrate that the valve is operable.

(h) Pressure vaccum relief valves shall be examined to determine that the operating mechanism is free and capable of activation.

(i) Safety relief valves shall be tested by bench testing or other suitable means. The valves shall relieve and reseat within the design tolerances of the set pressure, or it shall be removed and reset prior to being returned to service. This test shall be conducted at the time of the inspection for certification.

(j) Cargo hose stored on board the vessel which is used in transferring cargoes listed in Table 151.05 shall be inspected every 2 years. This inspection shall consist of a visual examination and a hydrostatic test of 1 1/2 times the maximum pressure to which the hose will be subjected in service. The date of the most recent inspection and the test pressure shall be stenciled or otherwise marked on the hose.

(k) Cargo piping shall be inspected and tested at the same time as the cargo tanks.

(l) If the tank is a pressure vessel type cargo tank with an internal inspection interval of 10 years, and is 30 years old or older, determined from the date it was built, the owner shall conduct nondestructive testing of each tank in accordance with §151.04–7, during each internal inspection.

[CFGR 70–10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88–100, 54 FR 40029, Sept. 29, 1989; CGD 85–061, 54 FR 50965, Dec. 11, 1989]

§ 151.04-7 Nondestructive testing.
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(a) Before nondestructive testing may be conducted to meet §151.04–5 (d) and (l), the owner shall submit a proposal to the Officer in Charge, Marine Inspection 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.

[CGD 85–061, 54 FR 50966, Dec. 11, 1989]

Subpart 151.05—Summary of Minimum Requirements for Specific Cargoes
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§ 151.05-1 Explanation of column headings in Table 151.05.
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(a) Cargo identification/name. This column identifies cargoes by name. Words in italics are not part of the cargo name but may be used in addition to the cargo name. When one entry references another entry by use of the word “see” and both names are in roman type, either name may be used as the cargo name (e.g., “Diethyl either see Ethyl ether”). However, the referenced entry is preferred.

(b) Cargo identification/pressure. This column identifies cargo in terms of pressure within the tank. Terms used are:

(1) Pressurized. Cargo carried at a pressure in excess of 10 pounds per square inch gauge as measured at the top of the tank (i.e., exclusive of static head).

(2) Atmospheric pressure. Cargo carried at not more than 10 pounds per square inch gauge, exclusive of static head.

(c) Cargo identification/temperature. This column identifies the cargo by the temperature of the cargo during transit.

(1) Ambient temperature. Cargo which is carried at naturally occurring temperatures.

(2) Low temperature. Cargo carried below ambient temperatures when the product temperature is below 0 °F.

(3) Elevated temperature. Cargo carried above ambient temperatures.

(d) Hull type. This column refers to the flotation features of the barge. Terms used are explained and defined in Subpart 151.10 of this part.

(e) Cargo segregation/tanks. This column refers to the separation of the cargo from its surroundings. Terms are explained in §151.13–5 and in footnotes to Table 151.05 of this part.

(f) Tanks/type. This column refers to the design requirements for cargo tanks and their placement within the hull of the vessel. Terms are explained in §151.15–1.

(g) Tanks/venting. This column refers to arrangements for preventing excess pressure or vacuum within the cargo tank. Terms used are explained and defined in §151.15–5.

(h) Tanks/gauging devices. This column refers to arrangements provided for determining the amount of cargo present in cargo tanks. Terms used are explained and defined in §151.15–10.

(i) Cargo transfer/piping. This column refers to the classification of piping in accordance with Subchapter F of this chapter as discussed in §151.20–1.

(j) Cargo transfer/control. This column refers to the valving requirements for the cargo piping system. These requirements are defined in §151.20–5.

(k) Environmental control/cargo tanks. This column refers to control of the composition of the environment within cargo tanks. Definitions and detailed requirements are given in §151.25–1.

(l) Environmental control/cargo handling space. This column refers to control of the environment in the cargo handling spaces. Definitions and detailed requirements are found in §151.25–2.

(m) Fire protection. This column specifies whether portable fire extinguishers are required on barges carrying the cargo named. Requirements for cargoes requiring extinguishers are given in Subpart 151.30 of this part.

(n) Special requirements. This column refers to requirements in subparts 151.40, 151.50, 151.55, 151.56, and 151.58 of this part which apply to specific cargoes. The section numbers listed omit the preceding part designation, “151”.

(o) Electrical hazard class—group. This column lists the electrical hazard class and group used for the cargo when determining requirements for electrical equipment under subchapter J (Electrical engineering) of this chapter.

(p) Temperature control installations. This column refers to systems which are used to control the temperature of the cargo. Definitions and requirements which are applicable if such systems are used are given in Subpart 151.40 of this part.

(q) Tank inspection period. This column refers to the maximum period in years between internal cargo tank inspections. Applicable requirements are given in §151.04–5.

[CGFR 70–10, 35 FR 3714, Feb. 25, 1970; 35 FR 6431, Apr. 22, 1970, as amended by CGD 74–275, 40 FR 21958, May 20, 1975; CGD 88–100, 54 FR 40029, Sept. 29, 19895; CGD 96–041, 61 FR 50731, Sept. 27, 1996; USCG 2000–7079, 65 FR 67183, Nov. 8, 2000]

§ 151.05-2 Compliance with requirements for tank barges carrying benzene and benzene containing cargoes, or butyl acrylate cargoes.
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A tank barge certificated to carry benzene and benzene containing cargoes or butyl acrylate cargoes must comply with the gauging requirement of Table 151.05 of this part by August 15, 1998. Until that date, a tank barge certificated to carry benzene and benzene containing cargoes must meet either the gauging requirement of Table 151.05 or the restricted or closed gauging requirements in effect on September 29, 1994; and a tank barge certificated to carry butyl acrylate cargoes must meet either the gauging requirements of Table 151.05 or comply with the open, restricted, or closed gauging requirements in effect on September 29, 1994.

[CGD 95–900, 60 FR 34050, June 29, 1995]

Table 151.05 to Subpart 151.05 of Part 151—Summary of Minimum Requirements
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Cargo identification\1\ Tanks Cargo transfer Environmental
------------------------------------------------------- Cargo ---------------------------------------------------------------- control Electrical Tank
Hull segre- ---------------------- Fire Special requirements hazard Temp. internal
type gation Gauging Piping Cargo protection in 46 CFR Part 151 class and control inspect.
Cargo name Pressure Temp. tank Type Vent device class Control Cargo handling required group install. period_years
tanks space
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a. b. c. d. e. f..................... g. h. i. j. k. l. m. n..................... o. p. q.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetaldehyde....................... Press. Amb. II 1NA Ind. Pressure......... SR Restr. II P-1 Inert Vent F Yes .55-1(h).............. I-C NA G
2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetic acid........................ Atmos. Amb. III 1 i Integral Gravity...... Open Open II G-1 NR Vent N Yes .50-73................ I-D NA G
2 i i .55-1(g)..............
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Acetic anhydride................... Atmos. Amb. III 1 i Integral Gravity...... PV Restr. II G-1 NR Vent F Yes .50-73................ I-D NA G
2 i i .55-1(g)..............
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Acetone cyanohydrin................ Atmos. Amb. I 1 i i Integral Gravity...... PV Closed I G-1 NR Vent F Yes .50-5................. I-D NA G
2 i .50-70(b).............
.50-73................
.50-81................
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Acetonitrile....................... Atmos. Amb. III 1 i Integral Gravity...... PV Restr. II G-1 NR Vent F Yes No.................... I-D NA G
2 i i
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Acrylic acid....................... Atmos. Amb. III 1 i i Integral Gravity...... PV Restr. II G-1 NR Vent F Yes .50-70(a)............. I-D NA G
2 i i .50-73................
.50-81................
.58-1(a)..............
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Acrylonitrile...................... Atmos. Amb. II 1 i i Integral Gravity...... PV Closed II G-1 NR Vent F Yes .55-1(e).............. I-D NA G
2 i i .50-70(a).............
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Adiponitrile....................... Atmos. Amb. II 1 i i Integral Gravity...... PV Open II G-1 NR Vent F Yes No.................... I-D NA G
2 i
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Alkylbenzenesulfonic acid (greater Atmos. Elev. III 1 i i Integral Gravity...... Open Open II G-1 NR Vent N Yes .50-73................ I-B NA G
than 4%). 2 i i .58-1(e)..............
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Alkyl(C7-C9) nitrates.............. Atmos. Amb. III 1 i Integral Gravity...... Open Open II G-1 NR Vent N Yes .50-81................ NA NA G
2 i i .50-86................
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Allyl alcohol...................... Atmos. Amb. I 1 i i Integral Gravity...... PV Closed I G-1 NR Vent F Yes .50-5................. I-C NA G
2 i i .50-73................
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Allyl chloride..................... Atmos. Amb. I 1 i i Integral Gravity...... PV Closed I G-1 NR Vent F Yes .50-5................. I-D NA G
2 i i
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Aluminum sulfate solution.......... Atmos. Amb. III 1 i Integral Gravity...... Open Open II G-1 NR Vent N Yes .58-1(e).............. NA NA G
2 i
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Aminoethylethanolamine............. Atmos. Amb. III 1 i Integral Gravity...... Open Open II G-1 NR Vent N Yes .55-1(b).............. NA NA G
2 i
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Ammonia, anhydrous................. Press. Amb. II 1NA Ind. Pressure......... SR250 Restr. II P-2 NR Vent F No .50-30................ I-D NA G
2 i i p.s.i. .50-32................
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Ammonia, anhydrous................. Atmos. Low II 1NA Ind. Gravity.......... PV Restr. II-L G-2 NR Vent F No .50-30................ I-D .40- 8
2 i i .50-32................ 1(b)(1)
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Ammonium bisulfite solution (70% or Atmos. Amb. III 1 i Integral Gravity...... Open Open II G-1 NR Vent N No .50-73................ NA NA G
less). 2 i .56-1(a), (b), (c)....
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Ammonium hydroxide (28% or less NH Atmos. Amb. III 1 i Integral Gravity...... PV Restr. II G-1 NR Vent F No .56-1(a), (b), (c), I-D NA G
3). 2 i (f), (g).
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Aniline............................ Atmos. Amb. I 1 i i Integral Gravity...... PV Closed I G-1 NR Vent F Yes .50-5................. I-D NA G
2 i i .50-73................
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Anthracene oil (Coal tar fraction). Atmos. Amb. II 1 i i Integral Gravity...... Open Open II G-1 NR Vent N Yes No.................... I-D NA G
Elev. 2 i i
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Argon, liquefied................... Press. Low III 1NA Ind. Pressure......... SR Restr. II-L P-1 NR Vent F No .40-1(a).............. NA .40-1(a) G
2 i .50-30................
.50-36................
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Benzene............................ Atmos. Amb. III 1 i Integral Gravity...... PV Closed II G-1 NR Vent F Yes .50-60................ I-D NA G
2 i i
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Benzene hydrocarbon mixtures Atmos. Amb. III 1 i Integral Gravity...... PV Closed II G-1 NR Vent F Yes .50-60................ I-D NA G
(containing Acetylenes) (having 2 i i .56-1(b), (d), (f),
10% Benzene or more). (g),.
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Benzene hydrocarbon mixtures Atmos. Amb. III 1 i Integral Gravity...... PV Closed II G-1 NR Vent F Yes .50-60................ I-D NA G
(having 10% Benzene or more). 2 i i
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Benzene, Toluene, Xylene mixtures Atmos. Amb. III 1 i Integral Gravity...... PV Closed II G-1 NR Vent F Yes .50-60................ I-D NA G
(having 10% Benzene or more). 2 i i
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