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 |