HDPE double wall corrugated pipe is a new type of lightweight pipe made of polyethylene as raw material, processed through extrusion and special molding processes, with smooth inner walls and closed corrugated outer walls. Due to the use of a special hollow ring structure, it has excellent ring stiffness and good strength and toughness. Double wall corrugated pipe has become the preferred pipe material for "replacing steel with plastic" in the pipeline field. It overcomes the disadvantages of difficult installation, easy corrosion, high water flow resistance, bacterial growth, and short service life of concrete pipes, cast iron pipes, etc.