... wall corrugated pipe, production diameter range of 63mm-600mm. Molding machine with horizontal structure, chain drive, closed water cooling, vacuum forming ... and outside the hollow wall of a special pipe, mainly used for underground sewage drainage system, water transportation, ventilation systems, ... .PVC, PE double-wall corrugated pipe production line specifications: Φ90-Φ160, Φ200-Φ500, Φ200-Φ600