Double Wall Corrugated Pipe is mainly used for water drainage system. It is a fully computer controlled line. It features high and stable output capacity, and highly automatic operation. For PE, you can choose high efficient single screw extruder. For PVCorFR-PP, you can choose conical twin-screw extruder or parallel twin- screw extruder. Forming system consists mould and corrugator. Mould blocks can be easily changed and they have air or water cooling system. The belling process is on line. High cutting can be guaranteed by cutting machine. The production line can also be equipped with SIEMENS PLC system.