HDPE(High Density Polyethylene) pipes are made of a high crystalline and no crystalline thermoplastic resin, with excellent resistance to most of life and industrial chemicals. Insulation dielectric strength is high,also has excellent impact resistance and good economy and perfect flexibility. HDPE pipe is a replacement oftraditional steel pipe,it has wide range of uses,the main usage is water supply system,such as municipal,building and residential area,factory,industrial and it also can be used in the water treatment pipeline system.