HDPE (High density PE) double-wall bellows

HDPE (High density PE) double-wall bellowsProduct introductionExexutive standard: GB/T19472.1-2004 Polyethylene structure wall piping system for underground use Part 1 Polyethylene double wall corrugated pipe.Polyethylene double wall corrugated pipe is a new type of pipe with smooth inner wall and ring-shaped outer wall, which is made of high-density polyethylene as the main raw material and produced by three processes of pipe forming, cutting and expanding. It is a double