1,PP-R pipe production line 2,pipe diameter:20-63mm 3,Speed upto 16m/min 4,Also ... welcome to our websitezhangjiagang xintain machienry Co., Ltd PP-R pipe production lineFeatures and applicants:special single screw extruder for polyolefin ... channel, smooth outside and inside wall, and a litte internal stress.producing pipe limit 20-63mm, manufacture velocity upto 16m/minmay be ...