... of PVC pipe production line including: 1. Twin-screw extruder, 2. Mould, 3. Vacuum calibration and cooling ... tank, 4. Hualing off machine(2-pedrails, 3-pedrails, 4-pedrails, 6-pedrials, ... production line: 1. Hot and cooling mixer 2. Socketing machine 3. PVC crusher and pulverizer ... brand, like Siemens, FUJI, ABB and Schneider 2. Superior quality screw and barrel which are ...