Technical Booklet L Combustion Appliances and Fuel Storage Systems·Page 90·Table B2
Pressure classes table
Table B2 specifies test pressures in Pascals and maximum leakage rates for each pressure class (N1, N2, P1, P2, H1, H2).
Table B2 Pressure classes
Pressure class | Test pressure Pa | Gas tightness Maximum leakage rate L/s/m2
N1 | 40 | 2.0
N2 | 20 | 3.0
P1 | 200 | 0.006
P2 | 200 | 0.120
H1 | 5000 | 0.006
H2 | 5000 | 0.120
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