... 5.Good impact resistanc HDPE double wall corrugated tube Product introduction:According to different ring stiffness grades, HDPE double wall corrugated pipe falls into S1(ring ... resistant2. Smooth inner surface, thus large flowing amount3. Convenient pipe connection, perfect connecting sealing, anticorrosion, no leakage, no ... , no delamination, no crackCreep rate≤4 HDPE double wall corrugated tube