1) Used for producing plastic single/double wall corrugated pipe 2) Sizes for pipe: a) HDPE double-wall corrugated pipe extrusion line: 0mm-500mm, PVC double-wall corrugated b) Pipe extrusion line: 0mm-00mmsmall-sized, single/double-wall corrugated c) Pipe extrusion line: 0mm-60mm, PVC / PE / PPR d) Plastic pipe extrusion line: 0mm-30mm 3) Mainly used for PVC, PE, HDPE and PP material 4) Small-sized single/double wall corrugated pipe extrusion line, used for HDPE, PVC and PP material, 0-60mm 5) Fully computer controlled, automatic production line 6) Belling machine series; extruder series; die head and mould