... , independent research and development of PVC double-wall corrugated pipe production line, can production of PVC, PE double-wall corrugated pipe, production diameter range of 63mm-600mm ... , water transportation, ventilation systems, cable sheathing.PVC, PE double-wall corrugated pipe production line specifications: Φ90-Φ160, Φ200-Φ500, Φ200-Φ600 Plastic double-wall corrugated pipe production machine