... (or single screw extruder) ,machine head,Double-wall Corrugation Pipe forming machine,plastic pipe belling machine,stacker,water-cooling machine,air ... single-wall corrugation Pipe. Technical parameters of forming machine for single wall corrugation pipe line: Forming machine noBW-I-13BW-I-36BW-I ... .1-1 PE ,PVC single-wall,double-wall corrugation pipe production line