| Code | Minimum Test Pressure | Minimum Shell Thickness | Pressure Relief Provisions | Bottom Opening Provisions |
| T1 | 1.5 bar | 5 mm if D < 1.80 m or6 mm if D >1.80 | Normal (no bursting disc required) | 2 shut-off devices |
| T2 | 1.5 bar | 5 mm if D <1.80 m or6 mm if D >1.80 | Normal (no bursting disc required) | 3 shut-off devices |
| T3 | 2.65 bar | 5 mm if D < 1.80 m or 6 mm if D >1.80 | Normal (no bursting disc required) | 2 shut-off devices |
| T4 | 2.65 bar | 5 mm if D < 1.80 m or 6 mm if D >1.80 | Normal (no bursting disc required) | 3 shut-off devices |
| T5 | 2.65 bar | 5 mm if D < 1.80 m or 6 mm if D > 1.80 | Safety relief valve with bursting disc in series | Not allowed |
| T6 | 4 bar | 5 mm if D < 1.80 m or6 mm if D >1.80 | Normal (no bursting disc required) | 2 shut-off devices |
| T7 | 4 bar | 5 mm if D < 1.80 m or 6 mm if D > 1.80 | Normal (no bursting disc required) | 3 shut-off devices |
| T8 | 4 bar | 5 mm if D < 1.80 m or 6 mm if D >1.80 | Normal (no bursting disc required) | Not allowed |
| T9 | 4 bar | 6 mm | Normal (no bursting disc required) | Not allowed |
| T10 | 4 bar | 6 mm | Safety relief valve with bursting disc in series | Not allowed |
| T11 | 6 bar | 5 mm if D < 1.80 m or6 mm if D >1.80 | Normal (no bursting disc required) | 3 shut-off devices |
| T12 | 6 bar | 5 mm if D <1.80mor6mmif D>1.80 | Safety relief valve with bursting disc in series | 3 shut-off devices |
| T13 | 6 bar | 6 mm | Normal (no bursting disc required) | Not allowed |
| T14 | 6 bar | 6 mm | Safety relief valve with bursting disc in series | Not allowed |
| T15 | 10 bar | 5 mm if D < 1.80 m or 6 mm if D > 1.80 | Normal (no bursting disc required) | 3 shut-off devices |
| T16 | 10bar | 5 mm if D < 1.80 m or6 mm if D >1.80 | Safety relief valve with bursting disc in series | 3 shut-off devices |
| T17 | 10 bar | 6 mm | Normal (no bursting disc required) | 3 shut-off devices |
| T18 | 10 bar | 6 mm | Safety relief valve with bursting disc in series | 3 shut-off devices |
| T19 | 10 bar | 6 mm | Safety relief valve with bursting disc in series | Not allowed |
| T20 | 10 bar | 8 mm | Safety relief valve with bursting disc in series | Not allowed |
| T21 | 10bar | 10 mm Normal | no bursting disc required | Not allowed |
| T22 | 10 bar | 10 mm | Safety relief valve with bursting disc in series | Not allowed |
| T50 | Varies by Gas | Varies by Gas | Varies by Gas | Varies by Gas |