Thedouble-wall corrugated pipes production line is made up of vibration sifrer machine, high speed mixed machine with cooling machine, plastic powder feeder, concial twin-screw extruder, ( single screw extruder) machine head, double-wall corrugated pipe shaping machine, belling machine, air compressing machine and stacker. It is used to product PVC, PE plastic double-wall waving pipes and plastic single-wall waving pipes.