The HDPE/PVC double-wall corrugated pipe extrusion line with a diameter of 200-600 manufactured by our company has the advantages of high output, stable extrusion and high automation. The extruder can be specially designed according to the user's raw materials. HDPE adopts a new type of high-efficiency single-screw extruder. Mold and auxiliary equipment: The forming machine and machine head have high precision, and the modules are interchangeable. There are two cooling methods for the modules: water cooling and air cooling. The performance indicators of the formed pipes are guaranteed. The entire production line has a high automatic control function.