... -DN630mm 2,Easy construction,environmental,economic 3,Powerful guarantees the high quality of the productsHDPE pipe:1.Mainly used in urban water supply network ... .Health and consecrated antibacterial, long-term use not fouling, solve the pollution of drinking water;3.Inside sleek, low friction coefficient, medium ... cost is low;5.In normal conditions, using life-span of 50 years.