HDPE double wall corrugated composite pipe 1.DN:200-800mm 2.Ring ... and SN8 3.Material:PE HDPE double wall corrugated composite pipe Features:1, HDPE double wall corrugated pipe ... health, good sealing performance, corrosion resistance, shake resistance, good quality, cheap, easy to install and use the advantage. Music ... testno and drying crackConformedCreep rate,%≤20.46% High quality HDPE corrugated pipe