... OR others on request 3,Standard: GB/T13663-2000 4,Certification: ISO5,Connection: socket fusion joint,butt fusion ... joint,flanged joint Applications: 1,water supply2,industrial liquids transportation 3,sewage treatment 4,gas supplyAdvantages:1,Non-toxic ... as much as 50% over metal piping system 4,Higher Flow Capacity: smooth interior walls result in ... service and large discounts. hot sale HDPE water pipe