plastic extruder for pvc pipe Screw and barrel made of nitrided 38CrMoALA wear resistant, corrosion resistant, high strength plastic extruder for pvc pipepvc drainage pipe ... of polymer products, can produce from HDPE, PP, ABS, PVC, PET, PC, PS and other plastics material to pipes, ... 55kw SJ-120HY120mm25:1 30-90r/min1000mm 250kg/h75kw pvc drainage pipe making machine/plastic extruder for pvc pipe