... health, good sealing performance, corrosion resistance, shake resistance, good quality, cheap, easy to install and use the advantage. Music ... suitable for clean rainwater harvesting and large-diameter drainage systems. Physical properties ItemsIndexTesting resultRing stiffness KN/m^2S1≥44 ... delaminationConformedOven testno and drying crackConformedCreep rate,%≤20.46% High quality HDPE corrugated pipe