Nominal Size Outside Diameter Wall Thickness
Class B Class C Class D Class E Class 'O' Class E Class E
(6 Bar) (9 Bar) (12 Bar) (15 Bar) NON PRESSURE (15 Bar) (15 Bar)
Inch Min. mm Max. mm Min. mm Max. mm Min. mm Max. mm Min. mm Max. mm Min. mm Max. mm Min. mm Max. mm Min. mm Max. mm BAR Min. mm Max. mm BAR
 1/2 21.20 21.50 - - - - - - 1.70 2.10 2.80 3.30 28.00 3.70 4.30 40.00
 3/4 26.60 26.90 - - - - - - 1.90 2.50 2.90 3.40 22.00 3.90 4.50 32.00
1 33.30 33.80 - - - - - - 2.20 2.70 3.40 4.00 24.00 4.50 5.20 32.00
1.1/4 42.00 42.50 - - - - 2.20 2.70 2.70 3.20 3.60 4.20 20.00 4.80 5.50 28.00
1.1/2 48.00 48.50 - - - - 2.50 3.00 3.10 3.70 1.80 2.20 3.70 4.30 18.00 5.10 5.90 25.00
2 60.00 60.70 - - 2.50 3.00 3.10 3.70 3.90 4.90 1.80 2.20 5.50 6.30 22.00
2 1/2 75.00 75.30 - - 3.00 3.50 3.90 4.50 4.80 5.50 1.80 2.20
3 88.40 89.40 2.90 3.40 3.50 4.10 4.60 5.30 5.70 6.60 1.80 2.20
4 113.70 114.90 3.40 4.00 4.50 5.20 6.00 6.90 7.30 8.40 2.30 2.80
5 139.40 141.00 3.80 4.40 5.50 6.40 7.30 8.40 9.00 10.40 2.60 3.10
6 167.40 169.10 4.50 5.20 6.50 7.60 8.80 10.20 10.80 12.50 3.10 3.70
8 218.00 220.20 5.30 6.10 7.50 9.00 10.30 11.90 12.60 14.50 3.10 3.70
10 271.60 274.40 6.60 7.60 9.70 11.20 12.80 14.80 15.70 18.10 3.10 3.70
12 322.20 325.50 7.80 9.00 11.50 13.30 15.20 17.50 18.70 21.60 3.10 3.70
14 353.70 357.30 8.50 9.80 12.60 14.50 16.70 19.20 - - 3.60 4.20
16 404.30 408.50 9.70 11.20 14.50 16.70 - - - - 4.10 4.80
18 456.70 457.70 11.00 12.60 16.30 18.80 21.40 24.60 4.60 5.30
20 507.50 508.50 12.20 14.10 18.10 20.90 5.10 5.90
MANUFACTURED TO 5.8 & 6 METERS
STANDARD LENGTH CLASS 'C', 'D', & 'E' ARE TO BS 3505
CLASS 'B', 'O', '6' & '7' ARE TO BS 3506
COLOUR DARK GREY
WHITE, GREY (CLASS 'O')
SOCKET TYPE SOLVENT WELD