PVC double pipe machine 1.double-screw extruder 2. electric threat-passing pipes 3. produce two pipe simultanouesly PVC Twin Pipe Making Machine Equipment included: This production line composes a conical double-screw extruder, different pipe die heads and the relevant auxiliary machines. Finished products and application It is mainly used to produce PVC twin pipes which are used as electric thread-passing pipes and so on. With excellent extruding capacity, the production line can make small diameter pipes of high quality in excellent productivity. The whole set is easy and safe to operate. According to requirements of different clients, the whole production line has desirable man and machine interface which adopts PLC controlling program