Code of Federal Regulations Title 46. Shipping 46 CFR Pt. 151, Subpt. 151.05, Tbl. 151.05 Table 151.05 to Subpart 151.05 of Part 151—Summary of Minimum Requirements

Current as of January 02, 2025 | Updated by Findlaw Staff

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

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Cite this article: FindLaw.com - Code of Federal Regulations Title 46. Shipping 46 CFR Pt. 151, Subpt. 151.05, Tbl. 151.05 Table 151.05 to Subpart 151.05 of Part 151—Summary of Minimum Requirements - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-46-shipping/cfr-pt-46-151-subpt-151-05-tbl-151-05/

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Code of Federal Regulations Title 46. Shipping 46 CFR Pt. 151, Subpt. 151.05, Tbl. 151.05 Table 151.05 to Subpart 151.05 of Part 151—Summary of Minimum Requirements

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