... speed mixer, cooling machine, plastic feeder,conical twin screw extruder (or single screw extruder) ,machine head,Double-wall Corrugation Pipe forming machine,plastic pipe belling machine,stacker,water-cooling ... .15-1.5BW-II-1500Shuttle50010001000-1200HDPE/PP0.1-1 PE ,PVC single-wall,double-wall corrugation pipe production line