1.PE water supply pipe. 2.HDPE drink pipe. 3.HDPE water tube. 4.ISO4427 international standard. 5.New materials. The water supply pipes ... 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 ... chemical liquid transmission and protecting sleeve of cable etc. HDPE water supply pipes have blue and black with blue coloured tapes ...