Portable tank instructions

Portable tank instructions specify the requirements applicable to a portable tank when used for the
carriage of specific substances. Portable tank instructions T1 to T22 specify the applicable minimum
test pressure, the minimum shell thickness (in mm reference steel), and the pressure-relief and bottomopening
requirements.
 

T1 - T22

PORTABLE TANK INSTRUCTIONS

T1 - T22

These portable tank instructions apply to liquid and solid substances of Class 1 and Classes 3 to 9. The general provisions of Section 4.2.1 and the requirements of Section 6.7.2 shall be met.

Portable tank instruction

Minimum test pressure (bar)

Minimum shell thickness (in mm-reference steel) (see 6.7.2.4)

Pressure-relief requirementsa(see 6.7.2.8)

Bottom opening requirementsb(see 6.7.2.6)

T1

1.5

See 6.7.2.4.2

Normal

See 6.7.2.6.2

T2

1.5

See 6.7.2.4.2

Normal

See 6.7.2.6.3

T3

2.65

See 6.7.2.4.2

Normal

See 6.7.2.6.2

T4

2.65

See 6.7.2.4.2

Normal

See 6.7.2.6.3

T5

2.65

See 6.7.2.4.2

See 6.7.2.8.3

Not allowed

T6

4

See 6.7.2.4.2

Normal

See 6.7.2.6.2

T7

4

See 6.7.2.4.2

Normal

See 6.7.2.6.3

T8

4

See 6.7.2.4.2

Normal

Not allowed

T9

4

6mm

Normal

Not allowed

T10

4

6mm

See 6.7.2.8.3

Not allowed

T11

6

See 6.7.2.4.2

Normal

See 6.7.2.6.3

T12

6

See 6.7.2.4.2

See 6.7.2.8.3

See 6.7.2.6.3

T13

6

6mm

Normal

Not allowed

T14

6

6mm

See 6.7.2.8.3

Not allowed

T15

10

See 6.7.2.4.2

Normal

See 6.7.2.6.3

T16

10

See 6.7.2.4.2

See 6.7.2.8.3

See 6.7.2.6.3

T17

10

6mm

Normal

See 6.7.2.6.3

T18

10

6mm

See 6.7.2.8.3

See 6.7.2.6.3

T19

10

6mm

See 6.7.2.8.3

Not allowed

T20

10

8mm

See 6.7.2.8.3

Not allowed

T21

10

10mm

Normal

Not allowed

T22

10

10mm

See 6.7.2.8.3

Not allowed

When the word "Normal" is indicated, all the requirements of 6.7.2.8 apply except for 6.7.2.8.3.

When this column indicates "Not allowed", bottom openings are not permitted when the substance to be carried is a liquid (see 6.7.2.6.1). When the substance to be carried is a solid at all temperatures encountered under normal conditions of carriage, bottom openings conforming to the requirements of 6.7.2.6.2 are authorized.

 

T23 PORTABLE TANK INSTRUCTION T23

 

This portable tank instruction applies to self-reactive substances of Class 4.1 and organic peroxides of Class 5.2. The general provisions of Section 4.2.1 and the requirements of Section 6.7.2 shall be met. The additional provisions specific to self-reactive substances of Class 4.1 and organic peroxides of Class 5.2 in 4.2.1.13 shall also be met.

UN

No.

Substance

Minimum test pressure (bar)

Minimum shell thickness (mm- reference steel)

Bottom opening requi- rements

Pressure- relief requi- rements

Degree of filling

Control tempe- rature

Emergency temperature

3109

ORGANIC PEROXIDE, TYPE F, LIQUID

tert-Butyl hydro- peroxidea, not more than 72% with water

Cumyl hydro-peroxide, not more than 90% in diluent type A

Di-tert-butyl peroxide, not more than 32% in diluent type A

Isopropyl cumyl hydro- peroxide, not more than 72% in diluent type A

p-Menthyl hydro- peroxide, not more than 72% in diluent type A

Pinanyl hydro- peroxide, not more than 56% in diluent type A

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

   

3110

ORGANIC PEROXIDE TYPE F, SOLID

Dicumyl peroxide b

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

   

3119

ORGANIC PEROXIDE, TYPE F, LIQUID, TEMPERATURE CONTROLLED

4

See

6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

c

c

tert-Amyl peroxyneodecanoate, not more than 47% in diluent type A

         

-10 °C

-5 °C

tert-Butyl peroxyacetate, not more than 32% in diluent type B

         

+30 °C

+35 °C

tert-Butyl peroxy-2- ethylhexanoate, not more than 32% in diluent type B

         

+15 °C

+20 °C

 

 

Provided that steps have been taken to achieve the safety equivalence of 65% tert-Butyl hydroperoxide and 35% water.

Maximum quantity per portable tank: 2000 kg.

As approved by the competent authority.

 

T23 PORTABLE TANK INSTRUCTION (cont'd) T23

 

This portable tank instruction applies to self-reactive substances of Class 4.1 and organic peroxides of Class 5.2. The general provisions of Section 4.2.1 and the requirements of Section 6.7.2 shall be met. The additional provisions specific to self-reactive substances of Class 4.1 and organic peroxides of Class 5.2 in 4.2.1.13 shall also be met.

UN

No.

Substance

Minimum test pressure (bar)

Minimum shell thickness (mm- reference steel)

Bottom opening requi- rements

Pressure- relief requi- rements

Degree of filling

Control tempe- rature

Emergency temperature

3119

(Cont'd)

tert-Butyl peroxypivalate, not more than 27% in diluent type B

         

+5 °C

+10 °C

tert-Butyl peroxy- 3,5,5-trimethyl- hexanoate, not more than 32% in diluent type B

         

+35 °C

+40 °C

Di-(3,5,5-trimethyl- hexanoyl) peroxide, not more than 38% in diluent type A or type B

         

0 °C

+5 °C

Peroxyacetic acid, distilled, type F, stabilized d

         

+30 C

+35 C

3120

ORGANIC PEROXIDE, TYPE F, SOLID, TEMPERATURE CONTROLLED

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

c

c

3229

SELF-REACTIVE LIQUID TYPE F

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

   

3230

SELF-REACTIVE SOLID TYPE F

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

   

3239

SELF-REACTIVE LIQUID TYPE F, TEMPERATURE CONTROLLED

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

c

c

3240

SELF-REACTIVE SOLID TYPE F, TEMPERATURE CONTROLLED

4

See 6.7.2.4.2

See 6.7.2.6.3

See 6.7.2.8.2

4.2.1.13.6

4.2.1.13.7

4.2.1.13.8

See 4.2.1.13.13

c

c

 

 

As approved by the competent authority.

Formulation derived from distillation of peroxyacetic acid originating from peroxyacetic acid in concentration of not more than 41% with water, total active oxygen (Peroxyacetic acid+H2O2 9.5%, which fulfils the criteria of the Manual of Tests and Criteria, paragraph 20.4.3 (f). "CORROSIVE" subsidiary risk placard required (Model No 8, see 5.2.2.2.2).

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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated; respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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

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

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated; respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

1028

Dichlorodifluoromethane (Refrigerant gas R 12)

16.0

15.0

13.0

11.5

Allowed

Normal

1.15

1029

Dichlorofluoromethane (Refrigerant gas R 21)

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 1MPa (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

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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 R 40)

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 gases, 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

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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

0.81

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

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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 1,1-difluoroethane azeotropic mixture with approximately 74% dichlorodifluoromethane (Refrigerant gas R 500)

20.0

18.0

16.0

14.5

Allowed

Normal

1.01

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated; respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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

3153

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

 

T50 PORTABLE TANK INSTRUCTION (cont'd) 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 Section 4.2.2 and the requirements of Section

6.7.3 shall be met.

UN

No.

Non-refrigerated liquefied gases

Max. allowable working pressure (bar): Small; Bare; Sunshield; Insulated; respectivelya

Openings below liquid level

Pressure- relief requirementsb(see 6.7.3.7)

Maximum filling ratio

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

0.84

3338

Refrigerant gas R 407A

31.3

28.1

25.1

22.4

Allowed

Normal

0.95

3339

Refrigerant gas R 407B

33.0

29.6

26.5

23.6

Allowed

Normal

0.95

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

TP43c

3501

Chemical under pressure, flammable, n.o.s.

See MAWP definition in 6.7.3.1

Allowed

See 6.7.3.7.3

TP4c

3502

Chemical under pressure, toxic, n.o.s.

See MAWP definition in 6.7.3.1

Allowed

See 6.7.3.7.3

TP4c

3503

Chemical under pressure, corrosive, n.o.s.

See MAWP definition in 6.7.3.1

Allowed

See 6.7.3.7.3

TP4c

3504

Chemical under pressure, flammable, toxic, n.o.s.

See MAWP definition in 6.7.3.1

Allowed

See 6.7.3.7.3

TP4c

3505

Chemical under pressure, flammable, corrosive, n.o.s.

See MAWP definition in 6.7.3.1

Allowed

See 6.7.3.7.3

TP4c

 

"Small" means tanks having a shell with a diameter of 1.5 m or less; "Bare" means tanks having a shell with a diameter of more than 1.5 m 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 m with sun shield (see 6.7.3.2.12); "Insulated" means tanks having a shell with a diameter of more than 1.5 m with insulation (see 6.7.3.2.12); (See definition of "Design reference temperature" in 6.7.3.1).

The word "Normal" in the pressure relief requirements column indicates that a frangible disc as specified in

6.7.3.7.3 is not required.

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

T75

PORTABLE TANK INSTRUCTION

T75

 

This portable tank instruction applies to refri ovisions of Section 4.2.3 and

the requirements of Section 6.7.4 shall be met.

 

Portable tank special provisions

Portable tank special provisions are assigned to certain substances to indicate provisions which are in
addition to or in lieu of those provided by the portable tank instructions or the requirements in
Chapter 6.7. Portable tank special provisions are identified by an alpha numeric code beginning with
the letters "TP" (tank provision) and are assigned to specific substances in Column (11) of Table A of
Chapter 3.2. The following is a list of the portable tank special provisions:
TP1 The degree of filling prescribed in 4.2.1.9.2 shall not be exceeded.
 
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).
TP5 The degree of filling prescribed in 4.2.3.6 shall be met.
TP6 To prevent the tank bursting in any event, including fire engulfment, it shall be provided
with pressure-relief devices which are adequate in relation to the capacity of the tank
and to the nature of the substance carried. The device shall also be compatible with the
substance.
TP7 Air shall be eliminated from the vapour space by nitrogen or other means.
TP8 The test pressure may be reduced to 1.5 bar when the flash point of the substances
carried is greater than 0 °C.
TP9 A substance under this description shall only be carried in a portable tank under an
approval granted by the competent authority.
TP10 A lead lining, not less than 5 mm thick, which shall be tested annually, or another
suitable lining material approved by the competent authority is required.
TP12 (Deleted)
TP13 (Reserved)
TP16 The tank shall be fitted with a special device to prevent under-pressure and excess
pressure during normal carriage conditions. This device shall be approved by the
competent authority.
Pressure-relief requirements are as indicated in 6.7.2.8.3 to prevent crystallization of the
product in the pressure-relief valve.
TP17 Only inorganic non-combustible materials shall be used for thermal insulation of the
tank.
TP18 Temperature shall be maintained between 18 °C and 40 °C. Portable tanks containing
solidified methacrylic acid shall not be reheated during carriage.
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 carried 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.
TP22 Lubricant for joints or other devices shall be oxygen compatible.
TP23 Deleted.
TP24 The portable tank may be fitted with a device located under maximum filling conditions
in the vapour space of the shell to prevent the build up of excess pressure due to the
slow decomposition of the substance carried. This device shall also prevent an
unacceptable amount of leakage of liquid in the case of overturning or entry of foreign
matter into the tank. This device shall be approved by the competent authority or its
authorized body.
TP25 Sulphur trioxide 99.95% pure and above may be carried in tanks without an inhibitor
provided that it is maintained at a temperature equal to or above 32.5 °C.
TP26 When carried under heated conditions, the heating device shall be fitted outside the
shell. For UN 3176 this requirement only applies when the substance reacts dangerously
with water.
TP27 A portable tank having a minimum test pressure of 4 bar may be used if it is shown that
a test pressure of 4 bar or less is acceptable according to the test pressure definition
in 6.7.2.1.
TP28 A portable tank having a minimum test pressure of 2.65 bar may be used if it is shown
that a test pressure of 2.65 bar or less is acceptable according to the test pressure
definition in 6.7.2.1.
TP29 A portable tank having a minimum test pressure of 1.5 bar may be used if it is shown
that a test pressure of 1.5 bar or less is acceptable according to the test pressure
definition in 6.7.2.1.
TP30 This substance shall be carried in insulated tanks.
TP31 This substance may only be carried in tanks in the solid state.
TP32 For UN Nos. 0331, 0332 and 3375, portable tanks may be used subject to the following
conditions:
(a) To avoid unnecessary confinement, each portable tank constructed of metal shall
be fitted with a pressure-relief device that may be of the reclosing spring-loaded
type, a frangible disc or a fusible element. The set to discharge or burst pressure,
as applicable, shall not be greater than 2.65 bar for portable tanks with minimum
test pressures greater than 4 bar.
(b) For UN 3375 only, the suitability for carriage in tanks shall be demonstrated. One
method to evaluate this suitability is test 8 (d) in Test Series 8 (see Manual of
Tests and Criteria, Part 1, Sub-section 18.7).
(c) Substances shall not be allowed to remain in the portable tank for any period that
could result in caking. Appropriate measures shall be taken to avoid accumulation
and packing of substances in the tank (e.g. cleaning, etc).
TP33 The portable tank instruction assigned for this substance applies to granular and
powdered solids and to solids which are filled and discharged at temperatures above
their melting point which are cooled and carried as a solid mass. For solids which are
carried above their melting point, see 4.2.1.19.
TP34 Portable tanks need not be subjected to the impact test in 6.7.4.14.1 if the portable tank
is marked "NOT FOR RAIL TRANSPORT" on the plate specified in 6.7.4.15.1 and
also in letters of at least 10 cm high on both sides of the outer jacket.
TP35 Deleted.
TP36 Fusible elements in the vapour space may be used on portable tanks.
TP37 Deleted.
TP38 Portable tank instruction T9 prescribed in ADR applicable up to 31 December 2012 may
continue to be applied until 31 December 2018.
TP39 Portable tank instruction T4 prescribed in ADR applicable up to 31 December 2012 may
continue to be applied until 31 December 2018.
TP40 Portable tanks shall not be carried when connected with spray application equipment.
TP41 With the agreement of the competent authority, the 2.5 year internal examination may be
waived or substituted by other test methods or inspection procedures, provided that the
portable tank is dedicated to the carriage of the organometallic substances to which this
tank special provision is assigned. However this examination is required when the
conditions of 6.7.2.19.7 are met.

 

4.3

USE OF FIXED TANKS (TANK-VEHICLES), DEMOUNTABLE TANKS, TANK-CONTAINERS AND TANK SWAP BODIES WITH SHELLS MADE OF METALLIC MATERIALS, AND BATTERY-VEHICLES AND MULTIPLE-ELEMENT GAS CONTAINERS (MEGCs)

NOTE: For portable tanks and UN multiple-element gas containers (MEGCs) see Chapter 4.2; for fibrereinforced
plastics tanks, see Chapter 4.4; for vacuum operated waste tanks, see Chapter 4.5.

Scope

Provisions which take up the whole width of the page apply both to fixed tanks (tank-vehicles),
demountable tanks and battery-vehicles, and to tank-containers, tank swap bodies and MEGCs.
Provisions contained in a single column apply only to:
- fixed tanks (tank-vehicles), demountable tanks and battery-vehicles (left-hand column);
- tank-containers, tank swap bodies and MEGCs (right-hand column).

These provisions apply to:

fixed tanks (tank-vehicles), demountable tanks
and battery-vehicles
  tank-containers, tank swap bodies and MEGCs

used for the carriage of gaseous, liquid, powdery or granular substances.

Section 4.3.2 lists the provisions applicable to fixed tanks (tank-vehicles), demountable tanks, tankcontainers
and tank swap bodies, intended for the carriage of substances of all classes, and to batteryvehicles
and MEGCs intended for the carriage of gases of Class 2. Sections 4.3.3 and 4.3.4 contain
special provisions adding to or amending the provisions of Section 4.3.2.

For requirements concerning the construction, equipment, type approval, tests and marking, see
Chapter 6.8.

For transitional measures concerning the application of this Chapter, see:

1.6.3.  |    1.6.4.

Provisions applicable to all classes

Use

A substance subject to ADR may be carried in fixed tanks (tank-vehicles), demountable tanks, batteryvehicles,
tank-containers, tank swap bodies and MEGCs only when provision is made for a tank code
according to 4.3.3.1.1 and 4.3.4.1.1 in Column (12) of Table A in Chapter 3.2.

The required type of tank, battery-vehicle and MEGC is given in code form in Column (12) of Table
A in Chapter 3.2. The explanations for reading the four parts of the code are given in 4.3.3.1.1 (when
the substance to be carried belongs to Class 2) and in 4.3.4.1.1 (when the substance to be carried
belongs to Classes 1 and 3 to 9)1.

The required type according to 4.3.2.1.2 corresponds to the least stringent construction requirements
which are acceptable for the dangerous substance in question unless otherwise prescribed in this
Chapter or in Chapter 6.8. It is possible to use tanks corresponding to codes prescribing a higher
minimum calculation pressure, or more stringent requirements for filling or discharge openings or for
safety valves/devices (see 4.3.3.1.1 for Class 2 and 4.3.4.1.1 for Classes 3 to 9).
 
1 An exception is made for tanks intended for the carriage of substances of classes 1, 5.2 or 7 (see 4.3.4.1.3).

For certain substances, tanks, battery-vehicles or MEGCs are subject to additional provisions which
are included as special provisions in Column (13) of Table A in Chapter 3.2.
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