... , 3.Easy operation 4.Recyclable, 5.Good impact resistanc HDPE corrugated pipe with double wallsProduct advantages:1. High density, good compression resistance ... , easy but no leakage in the joit;4. Smooth interior wall and low friction, high flow capacity;5. Good corrosion resistance ... delamination, no dehicenceCreep Proportion≤4Leakage TestNo rupture, no leakage HDPE corrugated pipe with double walls