1.PE corrugated pipe line 2.PE/PVC pipe extrusion line 3.HDPE/ ... Description Features and application:1. PE or PVC twin-wall corrugated pipes are light, shock resistant, higher circle stiffness, corrosion resistant, chilliness ... Description Features and application:1. PE or PVC twin-wall corrugated pipes are light, shock resistant, higher circle stiffness, corrosion resistant, chilliness ...