HDPE double wall corrugated pipe extrusion line 1.Outer Diameter(mm): 400, 500, 600, 700, 800, ... 1000 2.Raw material: PE80,PE100 HDPE double wall corrugated pipe extrusion line Service Conditions:1 Power supply:(380V+5% 50Hz ,adjustable ... is used by two single screw composite extrusion way to production HDPE double-wall corrugated pipes Technical performance:1 Raw material : PE80 ...