Twinwall Standards
| Standard | Title | Application |
| BS EN 1295-1:1997 | Structural design of buried pipelines under various conditions of loading. General requirements. | |
|
BS EN 13476-3:2007 |
Plastics piping systems for non-pressure underground drainage and sewerage. Structured-wall piping systems of unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE). Specifications for pipes and fittings with smooth internal and profiled external surface and the system, Type B | |
|
WIS 4-35-01 |
Specification for thermoplastics structured wall pipes, joints and couplers with a smooth bore for gravity sewers for the size range 150-900 inclusive |