Extruder: It has high speed high efficiency screw, hard gear surface, FUJI invertor. This structure assures the material evenly heating, good plasticization and the extruding speed and efficiency. Corrugator: Close structure. Mold blocks through the gear transmission. Mold plate has water flowing to get cooling efficiency. The pipe cooling type is wind. This structure ensures high speed production and cooling. It can produce inner and outer layer smooth and corrugation uniformity pipe one time matching the corresponding molds. Mold block: The design of structure is reasonable, wind cooling and replacement of the module is convenient and reliable. Winding machine: Torque motor, single/double station winder.