1.HDPE service pipe. 2.water pipes. 3.drink hose. 4.ISO4427 international standard. 5.PE drink tube. The water supply pipes have two classes of PE80 and PE100. The products include six series of SDR11, SDR13.6, SDR17, SDR21, SDR26 and SDR33. The pressure resistance includes six classes of 0.4MPa, 0.6MPa, 0.8MPa, 1.0MPa, 1.25MPa and 1.6MPa. HDPE water supply pipes were produced by the national ...