Tightness test duration and allowable pressure drop for existing installations. (IGEM/UP/1A)
Installation Volume in metres³ | Tightness Test Duration in Minutes (Existing Installations) | |
Test using Air | Test using Gas | |
<=0.15 | 2 | 2 |
>0.15 up to 0.3 | 3 | 2 |
>0.3 up to 0.45 | 5 | 3 |
>0.45 up to 0.6 | 6 | 4 |
>0.6 up to 0.75 | 8 | 5 |
>0.75 up to 0.9 | 9 | 6 |
>0.9 up to 1 | 10 | 6 |
Maximum allowable pressure drop (mbar)
On existing installations there is an allowable drop based on the smallest volume of space that the gas could potentially end up in should a leak be present in that space. The volume of that space is given along the top of the table and the installation volume down the side.
IV | VOLUME OF SMALLEST OCCUPIED SPACE (RV)(m³) | ||||||||||||||||||||||||||
metres³ | <=10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 35 | 40 | 45 | 50 | 55 | =>60 |
<=0.15 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 2 | 2.1 | 2.4 | 2.8 | 3.1 | 3.5 | 3.9 | 4.2 |
>0.15-0.2 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 2 | 2.1 | 2.3 | 2.8 | 3 | 3.4 | 3.8 | 4.1 |
>0.2-0.25 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 1.9 | 2 | 2.2 | 2.7 | 2.9 | 3.3 | 3.7 | 4 |
>0.25-0.3 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.6 | 1.6 | 1.7 | 1.7 | 1.8 | 1.8 | 2 | 2.1 | 2.7 | 2.9 | 3.2 | 3.6 | 3.9 |
>0.3-0.35 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 0.9 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.6 | 1.6 | 1.6 | 1.7 | 1.7 | 1.8 | 1.9 | 2.1 | 2.6 | 2.8 | 3.2 | 3.6 | 3.9 |
>0.35-0.4 | 0.6 | 0.7 | 0.8 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.5 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.7 | 1.8 | 1.9 | 2 | 2.6 | 2.8 | 3.1 | 3.5 | 3.8 |
>0.4-0.45 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.7 | 1.8 | 1.9 | 2 | 2.5 | 2.7 | 3.1 | 3.4 | 3.7 |
>0.45-0.5 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.6 | 1.7 | 1.7 | 1.9 | 2 | 2.5 | 2.7 | 3 | 3.4 | 3.7 |
>0.5-0.55 | 0.6 | 0.6 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.5 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.8 | 2 | 2.4 | 2.6 | 3 | 3.3 | 3.6 |
>0.55-0.6 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.8 | 1.9 | 2.4 | 2.6 | 3 | 3.3 | 3.6 |
>0.6-0.65 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.8 | 1.9 | 2.3 | 2.5 | 2.9 | 3.2 | 3.5 |
>0.65-0.7 | 0.5 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.2 | 1.2 | 1.2 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.6 | 1.7 | 1.9 | 2.3 | 2.5 | 2.9 | 3.2 | 3.5 |
>0.7-0.75 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 1 | 1.1 | 1.1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.9 | 2.2 | 2.4 | 2.9 | 3.1 | 3.4 |
>0.75-0.8 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 1 | 1.1 | 1.1 | 1.1 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.7 | 1.9 | 2.2 | 2.4 | 2.8 | 3.1 | 3.3 |
>0.8-0.85 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.8 | 0.8 | 0.9 | 1 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.5 | 1.6 | 1.8 | 2.1 | 2.3 | 2.8 | 3 | 3.2 |
>0.85-0.9 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 1 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.5 | 1.5 | 1.6 | 1.8 | 2.1 | 2.3 | 2.6 | 3 | 3.1 |
>0.9-0.95 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.9 | 0.9 | 1 | 1 | 1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.6 | 1.8 | 2 | 2.2 | 2.6 | 2.9 | 3.1 |
>0.95-1.0 | 0.5 | 0.5 | 0.6 | 0.6 | 0.7 | 0.7 | 0.8 | 0.8 | 0.9 | 0.9 | 1 | 1 | 1.1 | 1.1 | 1.2 | 1.2 | 1.3 | 1.3 | 1.4 | 1.4 | 1.5 | 1.7 | 2 | 2.2 | 2.5 | 2.8 | 3 |
Let-By testing to IGEM/UP/1A
Let-By to be carried out at 50% of operating pressure OP.
Installation Volume (metres³) | Let-By Test Duration (minutes) |
<=0.5 | 2 |
>0.5 <=0.8 | 3 |
>0.8 <=1.0 | 4 |