BS EN 1115-1:2001 Plastics piping systems for underground drainage and sewerage under pressure — Glass - reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) — Part 1 : General
2006BS EN 14364+A1:2006 Plastics piping systems for drainage and sewerage with or without pressure. Glass-reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP). Specifications for pipes, fittings and joints
1970BS EN 1115-1:2001 Plastics piping systems for underground drainage and sewerage under pressure — Glass - reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) — Part 1 : General