Plastics piping systems -- Glass-reinforced thermosetting plastics (GRP) pipes and fittings -- Test method to prove the structural design of fittings— 12 стр.
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 (ISO 23856:2021)
