T50 PORTABLE TANK INSTRUCTION T50
This portable tank instruction applies to non-refrigerated liquefied gases and chemicals under pressure (UN Nos. 3500, 3501, 3502, 3503, 3504 and 3505). The general provisions of 4.2.2 and the provisions of 6.7.3 shall be met.
UN No. Non-refrigerated liquefied gases Maximum allowable working pressure (bar) Small; Bare; Sunshield; Insulated respectively1 Openings below liquid level Pressure relief provisions2 (see 6.7.3.7) Maximum filling ratio (kg/L)
1005 Ammonia, anhydrous 29.0
25.7
22.0
19.7
Allowed See 6.7.3.7.3 0.53
1009 Bromotrifluoromethane (Refrigerant gas R 13B1) 38.0
34.0
30.0
27.5
Allowed Normal 1.13
1010 Butadienes, stabilized 7.5
7.0
7.0
7.0
Allowed Normal 0.55
1010 Butadienes and hydrocarbon mixture, stabilized with more than 40% butadienes See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
1011 Butane 7.0
7.0
7.0
7.0
Allowed Normal 0.51
1012 Butylene 8.0
7.0
7.0
7.0
Allowed Normal 0.53
1017 Chlorine 19.0
17.0
15.0
13.5
Not allowed See 6.7.3.7.3 1.25
1018 Chlorodifluoromethane (Refrigerant gas R 22) 26.0
24.0
21.0
19.0
Allowed Normal 1.03
1020 Chloropentafluoroethane (Refrigerant gas R 115) 23.0
20.0
18.0
16.0
Allowed Normal 1.06
1021 1-Chloro-1,2,2,2-tetrafluoroethane (Refrigerant gas R 124) 10.3
9.8
7.9
7.0
Allowed Normal 1.20
1027 Cyclopropane 18.0
16.0
14.5
13.0
Allowed Normal 0.53
1028 Dichlorodifluoromethane (Refrigerant gas R 12) 16.0
15.0
13.0
11.5
Allowed Normal 1.15
1029 Dichlorofluoromethane (Refrigerant gas R 12) 7.0
7.0
7.0
7.0
Allowed Normal 1.23
1030 1,1-Difluoroethane (Refrigerant gas R 152a) 16.0
14.0
12.4
11.0
Allowed Normal 0.79
1032 Dimethylamine, anhydrous 7.0
7.0
7.0
7.0
Allowed Normal 0.59
1033 Dimethyl ether 15.5
13.8
12.0
10.6
Allowed Normal 0.58
1036 Ethylamine 7.0
7.0
7.0
7.0
Allowed Normal 0.61
1037 Ethyl chloride 7.0
7.0
7.0
7.0
Allowed Normal 0.80
1040 Ethylene oxide with nitrogen up to a total pressure of 1 MPa (10 bar) at 50°C -
-
-
10.0
Not allowed See 6.7.3.7.3 0.78
1041 Ethylene oxide and carbon dioxide mixture with more than 9% but not more than 87% ethylene oxide See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
1055 Isobutylene 8.1
7.0
7.0
7.0
Allowed Normal 0.52
1060 Methylacetylene and propadiene mixture, stabilized 28.0
24.5
22.0
20.0
Allowed Normal 0.43
1061 Methylamine, anhydrous 10.8
9.6
7.8
7.0
Allowed Normal 0.58
1062 Methyl bromide with not more than 2% chloropicrin 7.0
7.0
7.0
7.0
Not allowed See 6.7.3.7.3 1.51
1063 Methyl chloride (Refrigerant gas R40) 14.5
12.7
11.3
10.0
Allowed Normal 0.81
1064 Methyl mercaptan 7.0
7.0
7.0
7.0
Not allowed See 6.7.3.7.3 0.78
1067 Dinitrogen tetroxide 7.0
7.0
7.0
7.0
Not allowed See 6.7.3.7.3 1.30
1075 Petroleum gas, liquefied See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
1077 Propylene 28.0
24.5
22.0
20.0
Allowed Normal 0.43
1078 Refrigerant gas, N.O.S. See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
1079 Sulphur dioxide 11.6
10.3
8.5
7.6
Not allowed See 6.7.3.7.3 1.23
1082 Trifluorochloroethylene, stabilized (Refrigerant gas R 1113) 17.0
15.0
13.1
11.6
Not allowed See 6.7.3.7.3 1.13
1083 Trimethylamine, anhydrous 7.0
7.0
7.0
7.0
Allowed Normal 0.56
1085 Vinyl bromide, stabilized 7.0
7.0
7.0
7.0
Allowed Normal 1.37
1086 Vinyl chloride, stabilized 10.6
9.3
8.0
7.0
Allowed Normal 0.81
1087 Vinyl methyl ether, stabilized 7.0
7.0
7.0
7.0
Allowed Normal 0.67
1581 Chloropicrin and methyl bromide mixture with more than 2% chloropicrin 7.0
7.0
7.0
7.0
Not allowed See 6.7.3.7.3 1.51
1582 Chloropicrin and methyl chloride mixture 19.2
16.9
15.1
13.1
Not allowed See 6.7.3.7.3 1.13
1858 Hexafluoropropylene (Refrigerant gas R 1216) 19.2
16.9
15.1
13.1
Allowed Normal 1.11
1912 Methyl chloride and methylene chloride mixture 15.2
13.0
11.6
10.1
Allowed Normal 0.81
1958 1,2-Dichloro-1,1,2,2-tetrafluoroethane (Refrigerant gas R 114) 7.0
7.0
7.0
7.0
Allowed Normal 1.30
1965 Hydrocarbon gas, mixture liquefied, N.O.S. See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
1969 Isobutane 8.5
7.5
7.0
7.0
Allowed Normal 0.49
1973 Chlorodifluoromethane and chloropentafluoroethane mixture with fixed boiling point, with approximately 49% chlorodifluoromethane (Refrigerant gas R 502) 28.3
25.3
22.8
20.3
Allowed Normal 1.05
1974 Chlorodifluorobromomethane (Refrigerant gas R 12B1) 7.4
7.0
7.0
7.0
Allowed Normal 1.61
1976 Octafluorocyclobutane (Refrigerant gas RC 318) 8.8
7.8
7.0
7.0
Allowed Normal 1.34
1978 Propane 22.5
20.4
18.0
16.5
Allowed Normal 0.42
1983 1-Chloro-2,2,2-trifluoroethane (Refrigerant gas R 133a) 7.0
7.0
7.0
7.0
Allowed Normal 1.18
2035 1,1,1-Trifluoroethane (Refrigerant gas R 143a) 31.0
27.5
24.2
21.8
Allowed Normal 0.76
2424 Octafluoropropane (Refrigerant gas R 218) 23.1
20.8
18.6
16.6
Allowed Normal 1.07
2517 1-Chloro-1,1-difluoroethane (Refrigerant gas R 142b) 8.9
7.8
7.0
7.0
Allowed Normal 0.99
2602 Dichlorodifluoromethane and difluoroethane azeotropic mixture with approximately 74% dichlorodifluoromethane (Refrigerant gas R 500) 20.0
18.0
16.0
14.5
Allowed Normal 1.01
3057 Trifluoroacetyl chloride 14.6
12.9
11.3
9.9
Not allowed See 6.7.3.7.3 1.17
3070 Ethylene oxide and dichlorodifluoromethane mixture, with not more than 12.5% ethylene oxide 14.0
12.0
11.0
9.0
Allowed See 6.7.3.7.3 1.09
3158 Perfluoro(methyl vinyl ether) 14.3
13.4
11.2
10.2
Allowed Normal 1.14
3159 1,1,1,2-Tetrafluoroethane (Refrigerant gas R 134a) 17.7
15.7
13.8
12.1
Allowed Normal 1.04
3161 Liquefied gas, flammable, N.O.S. See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
3163 Liquefied gas, N.O.S. See MAWP definition in 6.7.3.1 Allowed Normal See 4.2.2.7
3220 Pentafluoroethane (Refrigerant gas R 125) 34.4
30.8
27.5
24.5
Allowed Normal 0.87
3252 Difluoromethane (Refrigerant gas R 32) 43.0
39.0
34.4
30.5
Allowed Normal 0.78
3296 Heptafluoropropane (Refrigerant gas R 227) 16.0
14.0
12.5
11.0
Allowed Normal 1.20
3297 Ethylene oxide and chlorotetrafluoroethane mixture, with not more than 8.8% ethylene oxide 8.1
7.0
7.0
7.0
Allowed Normal 1.16
3298 Ethylene oxide and pentafluoroethane mixture, with not more than 7.9% ethylene oxide 25.9
23.4
20.9
18.6
Allowed Normal 1.02
3299 Ethylene oxide and tetrafluoroethane mixture, with not more than 5.6% ethylene oxide 16.7
14.7
12.9
11.2
Allowed Normal 1.03
3318 Ammonia solution, relative density less than 0.880 at 15°C in water, with more than 50% ammonia See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 See 4.2.2.7
3337 Refrigerant gas R 404A 31.6
28.3
25.3
22.5
Allowed Normal 0.82
3338 Refrigerant gas R 407A 31.3
28.1
25.1
22.4
Allowed Normal 0.94
3339 Refrigerant gas R 407B 33.0
29.6
26.5
23.6
Allowed Normal 0.93
3340 Refrigerant gas R 407C 29.9
26.8
23.9
21.3
Allowed Normal 0.95
3500 Chemical under pressure, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43
3501 Chemical under pressure, flammable, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43
3502 Chemical under pressure, toxic, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43
3503 Chemical under pressure, corrosive, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43
3504 Chemical under pressure, flammable, toxic, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43
3505 Chemical under pressure, flammable, corrosive, n.o.s. See MAWP definition in 6.7.3.1 Allowed See 6.7.3.7.3 TP43

Special packing provisions:

TP4
The degree of filling shall not exceed 90% or, alternatively, any other value approved by the competent authority (see 4.2.1.16.2).
TP19
The calculated shell thickness shall be increased by 3 mm. Shell thickness shall be verified ultrasonically at intervals midway between periodic hydraulic tests.
TP20
This substance shall only be transported in insulated tanks under a nitrogen blanket.
TP21
The shell thickness shall be not less than 8 mm. Tanks shall be hydraulically tested and internally inspected at intervals not exceeding 2.5 years.
TP40
Portable tanks shall not be transported when connected with spray application equipment.
TP90
Tanks with bottom openings may be used on short international voyages.

  1. “Small” means tanks having a shell with a diameter of 1.5 metres or less; “Bare” means tanks having a shell with a diameter of more than 1.5 metres without insulation or sun shield (see 6.7.3.2.12); “Sunshield” means tanks having a shell with a diameter of more than 1.5 metres with sun shield (see 6.7.3.2.12); “Insulated” means tanks having a shell with a diameter of more than 1.5 metres with insulation (see 6.7.3.2.12); (See definition of “Design reference temperature” in 6.7.3.1).

  2. The word “Normal” in the pressure relief column indicates that a frangible disc as specified in 6.7.3.7.3 is not required.

  3. For UN Nos. 3500, 3501, 3502, 3503, 3504 and 3505, the degree of filling shall be considered instead of the maximum filling ratio.