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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 46 - Shipping
 Chapter I - Coast Guard, Department of Homeland Security
 SubChapter O - Certain Bulk Dangerous Cargoes
 Part 151 - Barges Carrying Bulk Liquid Hazardous Material Cargoes
 Subpart 151.05 - Summary of Minimum Requirements for Specific Cargoes

Table 151.05 to Subpart 151.05 of Part 151 - Summary of Minimum Requirements  

Latest version.

  • Table 151.05 to Subpart 151.05 of Part 151 - Summary of Minimum Requirements

    Cargo identification1 Hull
    type     		Cargo segre-
    gation
    tank     		Tanks Cargo transfer Environmental
    control     		Fire
    protection required     		Special requirements in 46 CFR Part 151 Electrical hazard class and group Temp. control install. Tank internal inspect. period - years
    Cargo name Pressure Temp. Type Vent Gauging device Piping class Control Cargo tanks Cargo handling space
    a. b. c. d. e. f. g. h. i. j. k. l. m. n. o. p. q.
    Acetaldehyde Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-1 Inert Vent F Yes .55-1(h) I-C NA G
    Acetic acid Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-73
    .55-1(g)    		 I-D NA G
    Acetic anhydride Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-73
    .55-1(g)    		 I-D NA G
    Acetone cyanohydrin Atmos. Amb. I 1 i i
    2 i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-70(b)
    .50-73
    .50-81    		 I-D NA G
    Acetonitrile Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    Acrylic acid Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-73
    .50-81
    .58-1(a)    		 I-D NA G
    Acrylonitrile Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .55-1(e)
    .50-70(a)    		 I-D NA G
    Adiponitrile Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Open II G-1 NR Vent F Yes No I-D NA G
    Alkylbenzenesulfonic acid (greater than 4%) Atmos. Elev. III 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-73
    .58-1(e)    		 I-B NA G
    Alkyl(C7-C9) nitrates Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-81
    .50-86    		 NA NA G
    Allyl alcohol Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-C NA G
    Allyl chloride Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5 I-D NA G
    Aluminum sulfate solution Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .58-1(e) NA NA G
    Aminoethylethanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(b) NA NA G
    Ammonia, anhydrous Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR250
    p.s.i.    		 Restr. II P-2 NR Vent F No .50-30
    .50-32    		 I-D NA G
    Ammonia, anhydrous Atmos. Low II 1NA
    2 i i    		 Ind. Gravity PV Restr. II-L G-2 NR Vent F No .50-30
    .50-32    		 I-D .40-
    1(b)(1)    		 8
    Ammonium bisulfite solution (70% or less) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-73
    .56-1(a), (b), (c)    		 NA NA G
    Ammonium hydroxide (28% or less NH3) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .56-1(a), (b), (c), (f), (g) I-D NA G
    Aniline Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA G
    Anthracene oil (Coal tar fraction) Atmos. Amb.
    Elev.    		 II 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No I-D NA G
    Argon, liquefied Press. Low III 1NA
    2 i    		 Ind. Pressure SR Restr. II-L P-1 NR Vent F No .40-1(a)
    .50-30
    .50-36    		 NA .40-1(a) G
    Benzene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-60 I-D NA G
    Benzene hydrocarbon mixtures (containing Acetylenes) (having 10% Benzene or more) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-60
    .56-1(b), (d), (f), (g),    		 I-D NA G
    Benzene hydrocarbon mixtures (having 10% Benzene or more) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-60 I-D NA G
    Benzene, Toluene, Xylene mixtures (having 10% Benzene or more) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-60 I-D NA G
    Butadiene Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 NR Vent F Yes .50-70(a)
    .50-73    		 I-B NA G
    Butadiene, Butylene mixtures (containing Acetylenes) Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-1 NR Vent F Yes .50-30
    .50-70(a)
    .50-73
    .56-1(b), (d), (f), (g)    		 I-B NA G
    Butyl acrylate (all isomers) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Butylamine (all isomers) Atmos. Amb. II 1 i i
    2 i i    		 Ind. Gravity PV Closed II G-1 NR Vent F Yes .55-1(c) I-D NA G
    Butyl methacrylate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Butyraldehyde (all isomers) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Open II G-1 NR Vent F Yes .55-1(h) I-C NA G
    Camphor oil (light) Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No I-D NA G
    Carbolic oil Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 NA NA G
    Carbon dioxide, liquefied Press. Low III 1NA
    2 i    		 Ind. Pressure SR Restr. I-L P-1 NR Vent F No .50-30 NA .40-1(b)(1) G
    Carbon disulfide Atmos. Amb. II 1NA
    2 i i    		 Ind. Gravity PV Restr. II G-1 Inert Vent F Yes .50-40
    .50-41    		 I-A NA G
    Carbon tetrachloride Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Open II G-1 NR Vent N No No NA NA G
    Cashew nut shell oil (untreated) Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-2 NR Vent N Yes .50-73 NA NA G
    Caustic potash solution Atmos. Amb.
    Elev.    		 III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .55-1(j)    		 NA NA G
    Caustic soda solution Atmos. Amb.
    Elev.    		 III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .55-1(j)    		 NA NA G
    Chlorine Press. Amb. I 1NA
    2 i i    		 Ind. Pressure SR300
    p.s.i.    		 Indirect I P-2 NR Vent F No .50-30
    .50-31    		 NA NA 3
    Chlorobenzene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Open II G-1 NR Vent N Yes No I-D NA G
    Chloroform Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent F No No NA NA G
    Chlorohydrins (crude) Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5 I-D NA G
    o-Chloronitrobenzene Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 NA NA G
    Chlorosulfonic acid Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Open II G-1 NR Vent N No .50-20
    .50-21
    .50-73    		 I-B NA G
    Coal tar naphtha solvent Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-73 I-D NA G
    Coal tar pitch (molten) Atmos. Elev. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-73 I-D NA G
    Creosote Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No NA NA G
    Cresols (all isomers) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No NA NA G
    Cresols with less than 5% Phenol, see Cresols (all isomers)
    Cresols with 5% or more Phenol, see Phenol
    Cresylate spent caustic Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-73
    .55-1(b)    		 NA NA G
    Cresylic acid, sodium salt solution, see Cresylate spent caustic
    Crotonaldehyde Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(h) I-C NA G
    Cyclohexanone Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(a), (b) I-D NA G
    Cyclohexanone, Cyclohexanol mixture Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(b) I-D NA G
    Cyclohexylamine Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(a), (b), (c), (g) I-D NA G
    Cyclopentadiene, Styrene, Benzene mixture Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent F Yes .50-60
    .56-1(b)    		 I-D NA G
    iso-Decyl acrylate Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-70(a)
    .50-81(a), (b)
    .55-1(c)    		 NA NA G
    Dichlorobenzene (all isomers) Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(a), (b) I-D NA G
    Dichlorodifluoromethane Press. Amb. III 1NA
    2 i    		 Ind. Pressure SR Restr. II P-1 NR NR No No NA NA G
    1,1-Dichloroethane Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    2,2′-Dichloroethyl ether Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(f) I-C NA G
    Dichloromethane Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No No I-D NA G
    2,4-Dichlorophenoxy acetic acid, diethanolamine salt solution Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .56-1(a), (b), (c), (g) NA NA G
    2,4-Dichlorophenoxyacetic acid, dimethylamine salt solution Atmos. Amb.
    Elev.    		 III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .56-1(a), (b), (c), (g) NA NA G
    2,4-Dichlorophenoxyacetic acid, triisopropanolamine salt solution Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .56-1(a), (b), (c), (g) NA NA G
    1,1-Dichloropropane Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    1,2-Dichloropropane Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    1,3-Dichloropropane Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    1,3-Dichloropropene Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    Dichloropropene, Dichloropropane mixtures Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes No I-D NA G
    2,2-Dichloropropionic acid Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 Dry Vent F Yes .50-73
    .58-1(e)    		 NA NA G
    Diethanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) NA NA G
    Diethylamine Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-C NA G
    Diethylenetriamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) NA NA G
    Diethyl ether, see Ethyl ether
    Diisobutylamine Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-C NA G
    Diisopropanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) NA NA G
    Diisopropylamine Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .55-1(c) I-C NA G
    N,N-Dimethylacetamide Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(b) I-D NA G
    Dimethylamine Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 NR Vent F Yes .55-1(c) I-C NA G
    Dimethylethanolamine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(b), (c) I-C NA G
    Dimethylformamide Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(e) I-D NA G
    1,4-Dioxane Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 Inert Vent F Yes No I-C NA G
    Diphenylmethane diisocyanate Atmos. Elev. II 1 i i
    2 i    		 Integral Gravity PV Closed I G-1 Inert
    Dry    		 Vent F Yes .50-5
    .56-1(a), (b)    		 NA Yes G
    Di-n-propylamine Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-C NA G
    Dodecyl- dimethyl- amine, Tetradecyldimethylamine mixture Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .56-1(b) NA NA G
    Dodecyl phenol Atmos. Amb. I 1 i i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-73 I-D NA 2
    Epichlorohydrin Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5 I-C NA G
    Ethanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) I-D NA G
    Ethyl acrylate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Ethylamine solution (72% or less) Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .55-1(b) I-D NA G
    N-Ethylbutylamine Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(b) I-C NA G
    Ethyl chloride Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 NR Vent F Yes No I-D NA 8
    N-Ethylcyclohexylamine Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(b) I-C NA G
    Ethylene chlorohydrin Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA G
    Ethylene cyanohydrin Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No NA NA G
    Ethylenediamine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-D NA G
    Ethylene dibromide Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Closed II G-1 NR Vent F No No NA NA G
    Ethylene dichloride Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    Ethylene glycol monoalkyl ethers
    Including:
    2-Ethoxyethanol
    Ethylene glycol butyl ether
    Ethylene glycol tert-butyl ether
    Ethylene glycol ethyl ether
    Ethylene glycol methyl ether
    Ethylene glycol n-propyl ether
    Ethylene glycol isopropyl ether     		Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-C NA G
    Ethylene glycol hexyl ether Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No NA NA G
    Ethylene glycol propyl ether Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes No NA NA G
    Ethylene oxide Press. Amb. I 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 Inert Vent F Yes .50-10
    .50-12    		 I-B .40-1(c) 4
    Ethyl ether Atmos. Amb. II 1NA
    2 i i    		 Ind. Gravity PV Closed II G-1 Inert Vent F Yes .50-40
    .50-42    		 I-C NA G
    2-Ethylhexyl acrylate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Ethylidene norbornene Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-5
    .50-74    		 NA NA G
    Ethyl methacrylate Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a) I-D NA G
    2-Ethyl-3-propylacrolein Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-C NA G
    Ferric chloride solutions Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-20
    .50-75    		 I-B NA G
    Fluorosilicic acid (30% or less) Atmos. Amb. II 1 i i
    2 i i    		 Ind. Gravity PV Closed II G-1 NR Vent F No .50-20
    .50-22
    .50-73
    .50-77    		 I-B NA 4
    Formaldehyde solution (37% to 50%) Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .55-1(h) I-B NA G
    Formic acid Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-73
    .55-1(i)    		 I-D NA G
    Furfural Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(h) I-C NA G
    Glutaraldehyde solution (50% or less) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No No NA NA G
    Glyoxylic acid solution (50% or less) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-73
    .50-81
    .58-1(e)    		 NA NA G
    Hexamethylenediamine solution Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-D NA G
    Hexamethyleneimine Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .56-1(b), (c) I-C NA G
    Hydrochloric acid Atmos. Amb. III 1NA
    2 i i    		 Ind. Gravity Open Open II G-1 NR Vent F No .50-20
    .50-22
    .50-73    		 I-B NA 4
    Hydrofluorosilicic acid (25% or less), see Fluorosilicic acid (30% or less)
    2-Hydroxyethyl acrylate Atmos. Amb. I 1 i i
    2 i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-70(a)
    .50-73
    .50-81(a), (b)    		 NA NA G
    Isoprene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Open II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Kraft pulping liquors (free alkali content 3% or more) (including: Black, Green, or White liquor) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .56-1(a), (c), (g)    		 NA NA G
    Mesityl oxide Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    Methylacetylene, Propadiene mixture Press. Amb. III 1 NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 NR Vent F Yes .50-79 I-C NA G
    Methyl acrylate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Methylamine solution (42% or less) Atmos. Amb. II 1NA
    2 i i    		 Ind. Gravity PV Closed II G-1 NR Vent F Yes .56-1(a), (b), (c), (g) I-D NA G
    Methyl bromide Press. Amb. I 1NA
    2 i i    		 Ind. Pressure SR Closed I P-2 NR Vent F Yes .50-5 I-D NA 2
    Methyl chloride Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-2 NR Vent F Yes .55-1(c) I-D NA 8
    Methylcyclopentadiene dimer Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-B NA G
    Methyl diethanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .56-1(b), (c) I-C NA G
    2-Methyl-5-ethylpyridine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(e) I-D NA G
    Methyl methacrylate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    2-Methylpyridine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(c) I-D NA G
    alpha-Methylstyrene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Monochloro- difluoromethane Press. Amb. III 1NA
    2 i    		 Ind. Pressure SR Restr. I P-1 NR NR No No NA NA G
    Morpholine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) I-C NA G
    Motor fuel anti-knock compounds (containing lead alkyls) Atmos. Amb. I 1 i i
    2 i i    		 Ind. Gravity PV Closed I G-1 NR Vent F Yes .50-6
    .50-73    		 I-D NA .50-6
    Nitric acid (70% or less) Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .50-20
    .50-73
    .50-80    		 I-B NA 4
    Nitrobenzene Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA G
    Nitrogen, liquefied Press. Low III 1NA
    2 i    		 Ind. Pressure SR Restr. II-L P-1 NR Vent F No .40-1(a)
    .50-30
    .50-36    		 NA .40-1(a) G
    1- or 2-Nitropropane Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-81 I-C NA G
    o-Nitrotoluene Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA G
    Octyl nitrates (all isomers), see Alkyl(C7-C9) nitrates
    Oleum Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-20
    .50-21
    .50-73    		 I-B NA 4
    Pentachloroethane Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No No NA NA G
    1,3-Pentadiene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81    		 I-D NA G
    Perchloroethylene Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No No NA NA G
    Phenol Atmos. Amb. I 1 i i
    2 i    		 Integral Gravity PV Closed I G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA 2
    Phosphoric acid Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-20
    .50-23
    .50-73    		 I-B NA 4
    Phosphorus, white (elemental) Atmos. Elev. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 Water
    Pad    		 Vent F Yes .50-50 NA NA 4-8
    Phthalic anhydride (molten) Atmos. Elev. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    Polyethylene polyamines Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(e) NA NA G
    Polymethylene polyphenyl isocyanate Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Closed II G-1 Dry Vent F Yes .55-1(e) NA NA G
    Potassium hydroxide solution, see Caustic potash solution
    iso-Propanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) I-D NA G
    Propanolamine (iso-, n-) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .56-1(b), (c) I-D NA G
    Propionic acid Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-73
    .55-1(g)    		 I-D NA G
    iso-Propylamine Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .55-1(c) I-D NA G
    Propylene oxide Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Restr. II P-1 Inert Vent F Yes .50-10
    .50-13    		 I-B NA G
    iso-Propyl ether Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 Inert Vent F Yes .50-70(a) I-D NA G
    Pyridine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(e) I-D NA G
    Sodium aluminate solution (45% or less) Atmos. Amb.
    Elev.    		 III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .56-1(a), (b), (c)    		 NA NA G
    Sodium chlorate solution (50% or less) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-73 NA NA G
    Sodium dichromate solution (70% or less) Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity Open Closed II G-1 NR Vent N No .50-5(d)
    .50-73
    .56-1(b), (c)    		 NA NA G
    Sodium hydroxide solution, see Caustic soda solution
    Sodium hypochlorite solution (20% or less) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .50-73
    .56-1(a), (b)    		 NA NA G
    Sodium sulfide, hydrosulfide solutions (H2S 15ppm or less) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-73
    .55-1(b)    		 NA NA G
    Sodium sulfide, hydrosulfide solutions (H2S greater than 15ppm but less than 200ppm) Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .50-73
    .55-1(b)    		 NA NA G
    Sodium sulfide, hydrosulfide solutions (H2S greater than 200ppm) Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Closed II G-1 NR Vent F No .50-73
    .55-1(b)    		 NA NA G
    Sodium thiocyanate solution (56% or less) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .58-1(a) NA NA G
    Styrene monomer Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Sulfur (molten) Atmos. Elev. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 Vent N Vent N Yes .50-55 I-C .40-
    1(f)(1)    		 G
    Sulfur dioxide Press. Amb. I 1NA
    2 i i    		 Ind. Pressure SR Closed P-2 NR Vent F No .50-30
    .50-84
    .55-1(j)    		 NA NA 2
    Sulfuric acid Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-20
    .50-21
    .50-73    		 I-B NA 4
    Sulfuric acid, spent Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N No .50-20
    .50-21
    .50-73    		 I-B NA 4
    1,1,2,2-Tetrachloroethane Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F No No NA NA G
    Tetraethylenepentamine Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(c) I-C NA G
    Tetrahydrofuran Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(b) I-C NA G
    Toluenediamine Atmos. Elev. II 1 i i
    2 i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-73
    .56-1(a), (b), (c), (g)    		 NA NA G
    Toluene diisocyanate Atmos. Amb. I 1 i i
    2 i i    		 Integral Gravity PV Closed I G-1 Dry
    N2     		Vent F Yes .50-5
    .55-1(e)    		 I-D NA G
    o-Toluidine Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Closed II G-1 NR Vent F Yes .50-5
    .50-73    		 I-D NA G
    1,2,4-Trichlorobenzene Atmos. Amb. III 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes No I-D NA G
    1,1,2-Trichloroethane Atmos. Amb. III 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .50-73
    .56-1(a)    		 I-D NA G
    Trichloroethylene Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No No I-D NA G
    1,2,3-Trichloropropane Atmos. Amb. II 1 i i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-73
    .56-1(a)    		 I-D NA G
    Triethanolamine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(b) I-C NA G
    Triethylamine Atmos. Amb. II 1 i i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .55-1(e) I-C NA G
    Triethylenetetramine Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR Vent N Yes .55-1(b) I-C NA G
    Triphenylborane (10% or less), Caustic soda solution Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .56-1(a), (b), (c) NA NA G
    Trisodium phosphate solution Atmos. Amb.
    Elev.    		 III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .56-1(a), (c)    		 NA NA G
    Urea, Ammonium nitrate solution (containing more than 2% NH3) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity PV Restr. II G-1 NR Vent F No .56-1(b) I-D NA G
    Valeraldehyde (all isomers) Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 Inert Vent F Yes No I-C NA G
    Vanillan black liquor (free alkali content 3% or more) Atmos. Amb. III 1 i
    2 i    		 Integral Gravity Open Open II G-1 NR NR No .50-73
    .56-1(a), (c), (g)    		 NA NA G
    Vinyl acetate Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Open II G-1 NR Vent F Yes .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Vinyl chloride Press. Amb. II 1NA
    2 i i    		 Ind. Pressure SR Closed II P-2 NR Vent F Yes .50-30
    .50-34    		 I-D NA 8
    Vinyl chloride Atmos. Low II 1NA
    2 i i    		 Ind. Gravity PV Closed II-L G-2 NR Vent F Yes .50-30
    .50-34    		 I-D .40-
    1(b)(1)    		 8
    Vinylidene chloride Atmos. Amb. II 1NA
    2 i i    		 Ind. Gravity PV Closed II P-2 Padded Vent F Yes .55-1(f)
    .50-70(a)
    .50-81(a), (b)    		 I-D NA G
    Vinyltoluene Atmos. Amb. III 1 i
    2 i i    		 Integral Gravity PV Restr. II G-1 NR Vent F Yes .50-70(a)
    .50-81
    .56-1(a), (b), (c), (g)    		 I-D NA G
    For requirements see these sections in Part 151: .10-1 .13- 5 .15- 1 .15-5 .15- 10 .20- 1 .20- 5 .25-1 .25-2 .30 111.105 (Sub-chapter J) .40 .04- 5

    See Table 2 of Part 153 for additional cargoes permitted to be carried by tankbarge.

    Terms and symbols:

    Segregation - Tank -

    Line 1 - Segregation of cargo from surrounding waters:

    i = Skin of vessel (single skin) only required. Cargo tank wall can be vessel's hull.

    i i = Double skin required. Cargo tank wall cannot be vessel's hull.

    Line 2 - Segregation of cargo space from machinery spaces and other spaces which have or could have a source of ignition:

    i = Single bulkhead only required. Tank wall can be sole separating medium.

    i i = Double bulkhead required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid (if compatible with cargo) is satisfactory.

    Internal tank inspection -

    G - Indicates cargo is subject to general provisions of 151.04-5(b).

    Specific numbers in this column are changes from the general provisions.

    Abbreviations used:

    Tank type: Ind = Independent.

    Vent:

    PV = Pressure vacuum valve.

    SR = Safety relief.

    Gauging device: Restr. = Restricted.

    General usage:

    NR = No requirement.

    NA = Not applicable.

    1. The provisions contained in 46 CFR Part 197, subpart C, apply to liquid cargoes containing 0.5% or more benzene by volume.

    [USCG-2000-7079, 65 FR 67183, Nov. 8, 2000]