BS ISO 10639:2017 Plastics piping systems for pressure and non - pressure water supply — Glass - reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
2021BS EN ISO 23856:2021 Plastics piping systems for pressure and non-pressure water supply, drainage or sewerage. Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
1970BS ISO 10639:2017 Plastics piping systems for pressure and non - pressure water supply — Glass - reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
2013BS EN 14364:2013 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