Dimensions and Nominal Masses of Black Steel Pipes Light, Medium & Heavy
Nominal Bore
Class
Outside Diameter
Thickness
Mass of Black Pipe
Max
Min
Plain End
Screwed & Socketed
mm
Kg/Mtr.
Kg./Mtr.
15
Light
21.4
21.0
2.0
0.952
0.961
Medium
21.8
2.65
1.22
1.23
Heavy
3.25
1.45
1.46
20
26.9
26.4
2.35
1.41
1.42
27.3
26.5
1.58
1.59
1.90
1.91
25
33.8
33.2
2.01
2.03
34.2
33.3
2.44
2.46
4.05
2.97
2.99
1. Thickness a) Light Pipes b) Medium & Heavy Pipes