PPR water pipes, short for random copolymer polypropylene pipes, are polymeric pipes made from type III polypropylene. These pipes feature high temperature resistance (up to 90℃), good pressure resistance, hygiene, and leak-proof heat fusion connections. They have a service life of up to 50 years and are mainly used in building water supply and drainage, urban and rural water supply and drainage, and agricultural irrigation. As a replacement for galvanized pipes, UPVC water supply pipes, and aluminum-plastic composite pipes, their materials are non-toxic, environmentally friendly, and have passed national standard certification.
The color of PPR pipes is determined by the added color masterbatch. Cold water pipes and hot water pipes are distinguished by blue/red marking lines and pipe wall thickness. They employ heat fusion socket connection technology, requiring specialized heat fusion tools and control of heating time, insertion depth, and other parameters. During construction, low-temperature brittleness must be avoided. For exposed or direct burial installations, supports and hangers (spacing ≤400mm) must be installed, and anti-expansion measures must be taken. In winter, when temperatures drop below 5℃, the heating time should be extended by 50%. Compared with copper pipes and aluminum-plastic composite pipes, PPR pipes have the advantages of moderate price and stable performance, but the cost of fittings is higher and the construction requirements are strict.
