Nominal Size (inch)
Outside Diameter (mm)
Wall Thickness (mm)
CLASS 'B'
CLASS 'C'
CLASS 'D'
CLASS 'E'
CLASS 'O'
CLASS '6'
CLASS '7'
MIN
MAX
1/2
21.2
21.5
1.7
2.1
2.8
3.3
3.7
4.3
3/4
26.6
26.9
1.9
2.5
2.9
3.4
3.9
4.5
1
33.4
33.7
2.2
2.7
4.0
5.2
1 1/4
42.1
42.4
3.2
3.6
4.2
4.8
5.5
1 1/2
48.1
48.4
3.0
3.1
1.8
5.1
5.9
2
60.2
60.5
6.3
2 1/2
75.0
75.3
3.5
3
88.7
89.1
4.1
4.6
5.3
5.7
6.6
4
114.1
114.5
6.0
6.9
7.3
8.4
2.3
6
168.0
168.5
7.6
8.8
10.2
10.8
12.5
8
218.8
219.4
6.1
7.8
9.0
10.3
11.9
12.6
14.5
Standard Length
:
5.8 & 6 meters
Color
Dark Gray (except Class ‘O’ – White & Class ‘B’ - Black
Socket Type
Solvent Weld & Plain-end
Note: Above standard is replaced by BS EN 1452 - 2 : 2000