NP EN 1448-2000 Plastics piping systems Glass-reinforced thermosetting plastics(GRP)components Test methods to prove the design of rigid locked socket-and-spigot joints with elastomeric seals
2000NP EN 1448-2000 Plastics piping systems Glass-reinforced thermosetting plastics(GRP)components Test methods to prove the design of rigid locked socket-and-spigot joints with elastomeric seals