1.HDPE double-wall corrugated pipe 2.Good abrasion resistance 3.Widely used ... the drainage of railway,highway ,tunnel HDPE double-wall corrugated pipe using HDPE as main material, and adds various ... tunnel , waste landfill, green belts ,sports ground and slopes with high water content, etc.1 Municipal engineering rainwater, sewage discharges ... should be smooth , no burr. HDPE double-wall corrugated pipe