What are the pipe structure and performance of aluminum alloy composite pipe fittings

Aluminum alloy lined plastic composite pipe is a new type of building material developed in China in recent years. Its outer layer is aluminum alloy and inner polypropylene (PP), which are closely combined. It can be widely used in domestic water supply, industrial water supply, hot water supply system and drinking water purification system, and has good promotion and application prospects and good social and economic benefits. 1.1 Pipe structure Cold water type seamless aluminum alloy lined plastic pipe lining material is polypropylene (PP), with seamless aluminum alloy pipe as the outer pipe; hot water type seamless aluminum alloy lined plastic pipe lining material is type III polypropylene (Random co-polypropylene PP-R), with seamless aluminum alloy tube as the outer tube.　　1.2 pipe performance 　　 1) light weight; 2) sanitation; 3) pressure resistance; 4) corrosion resistance; 5) small pipe resistance; 6) heat insulation; 7) beautiful; 8) durable.　　Second, the construction process　　2.1 connection method　　The seamless aluminum alloy lining plastic pipe adopts the card sleeve connection method.　　2.2 Construction process　　Familiar with the drawings-a set of pipes reserved for sub-L holes, a pipe rack system, a measurement and marking, all pipes, a nozzle cleaning, a pipe fitting inspection, a set of connections, a thermal compensator, a fixed pressure test, and an acceptance.