GB/T 18997.1-2020 Active

This part of GB/T 18997 specifies the terms and definitions, symbols and abbreviations, classification, conditions of use and marking, materials, requirements, test methods, inspection rules, marking, packaging, transportation, and storage of aluminum-plastic composite pressure pipes (referred to as welded aluminum-plastic pipes) reinforced with embedded overlapped-welded aluminum pipes as the metal layer and compounded with inner and outer layers of plastic by co-extrusion hot-melt adhesive.
This part is applicable to heat-resistant polyethylene welded aluminum-plastic pipes, cross-linked polyethylene welded aluminum-plastic pipes, and random copolymer polypropylene welded aluminum-plastic pipes used in cold and hot water distribution systems, as well as polyethylene welded aluminum-plastic pipes and cross-linked polyethylene welded aluminum-plastic pipes used in cold water, gas, compressed air, and special fluid distribution systems with operating temperatures not exceeding 40 °C.
Note: Polyethylene welded aluminum-plastic pipes, heat-resistant polyethylene welded aluminum-plastic pipes, and cross-linked polyethylene welded aluminum-plastic pipes adopt inner sealed mechanical connections, while random copolymer polypropylene welded aluminum-plastic pipes adopt double-sided hot-melt socket-and-plug connections.