PP-R pipe production line 1. Special single screw extruder for polyolefin, have high extruding velocity and effective plasticization .2. Separation mixing ... die , reasonable channel . soomth outside and inside wall , and little inter stress4. Producing pipe limit 20-160mm , manufacture velocity up ... product HDPE silicon core tube , ordinary PP-R , PE and PEX pipes .6. Low cost: The cost of nanometer ...