Class
Nominal
Pressure in Bars
Nominal O.D
 Tolerance ON O.D
mm mm
Class 1

2 BAR
Wall
Thickness		 Nominal
Weight
mm kg/m
Class 2

4 BAR

Wall
Thickness		 Nominal
Weight
mm kg/m
Class 3

6 BAR

Wall
Thickness		 Nominal
Weight
mm kg/m
Class 4

10 BAR

Wall
Thickness		 Nominal
Weight
mm kg/m
Class 5

16 BAR

Wall
Thickness		 Nominal
Weight
mm kg/m
 
20 +0.2                 1.5 0.137
25 +0.2             1.5 1.174 1.9 0.212
32 +0.2             1.8 0.264 2.4 0.342
40 +0.2         1.8 0.334 1.9 0.350 3.0 0.525
50 +0.2         1.8 0.422 2.4 0.552 3.7 0.809
63 +0.2         1.9 0.562 3.0 0.854 4.7 1.29
75 +0.3     1.8 0.642 2.2 0.782 3.6 1.22 5.6 1.82
90 +0.3     1.8 0.774 2.7 1.13 4.3 1.75 6.7 2.61
110 +0.3 1.8 0.950 2.2 1.16 3.2 1.64 5.3 2.61 8.2 3.90
160 +0.4 1.8 1.39 3.2 2.41 4.7 3.44 7.7 5.47 11.9 8.17
200 +0.4 1.8 1.74 4.0 3.70 5.9 5.37 9.6 8.51 14.9 12.8
250 +0.5 2.0 2.40 4.9 5.65 7.3 8.31 11.9 13.2 18.6 19.9
315 +0.6 2.5 3.78 6.2 9.02 9.2 13.2 15.0 20.9 23.4 31.5