The production system is mainly composed of control system, extruder, die head, sizing system, traction cutting device,cutting machine Compared with the traditional bracket type die head, the internal pressure distribution of the die head with spiral shunting head is more uniform. Adopt special vacuum sizing and cooling system: the perfect water temperature, water level and flow control, caensure the production of high quality pipe. The whole production line has the advantages of convenient operation, reliable running, high control precision and high output.