1.HDPE double-wall corrugated pipe 2.Good abrasion resistance 3.Widely used in the drainage of railway,highway ,tunnel HDPE double-wall corrugated pipe using HDPE as main material, and adds various plastic additives,then by twin-screw extrusion, a pipe formed which consist of two layers, inner smooth wall and outer corrugation.Product Features:1.corrosion resistance 2.light weight, easy to ...