NF T57-224:1997 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.
1997NF T57-224:1997 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.