Summary of T1 - T22 T-Codes
Please refer to ADR or IMDG code chapters 4.2 for details full details of the T Codes, and for detailed provisions for individual substances.
Portable tank instructions specify the provisions applicable to a tank container when used for the transport of specific hazardous substances. The T codes T1 to T22 specify the minimum test pressure and the minimum shell thickness of the tank vessel (which is referred in mm reference steel), and the pressure relief valve and bottom-opening provisions.
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PORTABLE TANK INSTRUCTIONS |
Download T-Codes (70KB) |
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These portable tank instructions apply to liquid and solid substances of classes 3 to 9. The general provisions of IMDG Section 4.2.1 and the requirements of Section 6.7.2 |
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Portable Tank Instruction |
Minimum test pressure (bar) |
Minimum shell thickness (in mm-reference steel) (see IMDG 6.7.2.4) |
Pressure-relief requirements (see IMDG 6.7.2.8) |
Bottom opening requirements (see IMDG 6.7.2.6) |
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T1 |
1,5 |
>or = 6mm |
normal |
int + ext |
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T2 |
1,5 |
>or = 6mm |
normal |
Int+ext+cap/blank |
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T3 |
2,65 |
>or = 6mm |
normal |
int + ext |
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T4 |
2,65 |
>or = 6mm |
normal |
Int+ext+cap/blank |
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T5 |
2,65 |
>or = 6mm |
normal + rupture disc |
not allowed |
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T6 |
4 |
>or = 6mm |
normal |
int + ext |
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T7 |
4 |
>or = 6mm |
normal |
Int+ext+cap/blank |
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T8 |
4 |
>or = 6mm |
normal |
not allowed |
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T9 |
4 |
6 mm |
normal |
not allowed |
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T10 |
4 |
6 mm |
normal + rupture disc |
not allowed |
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T11 |
6 |
>or = 6mm |
normal |
Int+ext+cap/blank |
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T12 |
6 |
>or = 6mm |
normal + rupture disc |
Int+ext+cap/blank |
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T13 |
6 |
6 mm |
normal |
not allowed |
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T14 |
6 |
6 mm |
normal + rupture disc |
not allowed |
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T15 |
10 |
>or = 6mm |
normal |
Int+ext+cap/blank |
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T16 |
10 |
>or = 6mm |
normal + rupture disc |
Int+ext+cap/blank |
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T17 |
10 |
6 mm |
normal |
Int+ext+cap/blank |
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T18 |
10 |
6 mm |
normal + rupture disc |
Int+ext+cap/blank |
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T19 |
10 |
6 mm |
normal + rupture disc |
not allowed |
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T20 |
10 |
8 mm |
normal + rupture disc |
not allowed |
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T21 |
10 |
10 mm |
normal |
not allowed |
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T22 |
10 |
10 mm |
normal + rupture disc |
not allowed |
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T23 |
Depending on product |
Depending on product | Depending on product | Depending on product |
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T50 |
Depending on gas | Depending on gas | Depending on gas | Depending on gas |
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T75 |
Depending on gas(frozen) | Depending on gas(frozen) | Depending on gas(frozen) | Depending on gas(frozen) |