BS 7291 - Thermoplastics Pipes for Hot and Cold Water - Dimensions
BS 7291 Thermoplastics pipe and fitting systems for hot and cold water for domestic purposes and heating installations in buildings. General requirements - is divided in four parts
- Part 1 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. General requirements
- Part 2 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. Specification for polybutylene (PB) pipes and associated fittings
- Part 3 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. Specification for crosslinked polyethylene (PE-X) pipes and associated fittings
- Part 4 Thermoplastics pipes and associated fittings for hot and cold water for domestic purposes and heating installations in buildings. Specification for chlorinated polyvinyl chloride (PVC-C) pipes and associated fittings and solvent cement
Dimensions Part 2 - PB pipes
PB pipes consistent with EN 1057
| Nominal Size (mm) | Mean Outside Diameter (mm) | Wall Thickness (mm) | ||
|---|---|---|---|---|
| Min. | Max. | Min. | Max. | |
| 10 | 9.9 | 10.1 | 1.5 | 1.8 |
| 12 | 11.9 | 12.1 | 1.5 | 1.8 |
| 15 | 14.9 | 15.1 | 1.5 | 2.0 |
| 18 | 17.9 | 18.1 | 1.8 | 2.0 |
| 22 | 21.9 | 22.1 | 2.0 | 2.3 |
| 28 | 27.9 | 28.1 | 2.6 | 2.9 |
| 35 | 34.9 | 35.1 | 3.2 | 3.5 |
PB pipes consistent with ISO 4065
| Nominal Size (mm) | Mean Outside Diameter (mm) | Wall Thickness (mm) | ||
|---|---|---|---|---|
| Min. | Max. | Min. | Max. | |
| 10 | 10.0 | 10.2 | 1.5 | 1.8 |
| 12 | 12.0 | 12.3 | 1.5 | 1.8 |
| 16 | 16.0 | 16.3 | 1.5 | 2.1 |
| 20 | 20.0 | 20.3 | 1.9 | 2.2 |
| 25 | 25.0 | 25.3 | 2.3 | 2.7 |
| 32 | 32.0 | 32.3 | 2.9 | 3.3 |
| 40 | 40.0 | 40.4 | 3.7 | 4.2 |
| 50 | 50.0 | 50.5 | 4.6 | 5.2 |
| 63 | 63.0 | 63.6 | 5.8 | 6.5 |
| 75 | 75.0 | 75.7 | 6.8 | 7.6 |
| 90 | 90.0 | 90.9 | 8.2 | 9.2 |
| 110 | 110. | 111.0 | 10.0 | 11.2 |
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