Steel tubes in the process of production have many factors will influence the quality of pipe end, so, in order to make the pipe's overall quality guaranteed, we must master some methods, for HDPE double-wall corrugated pipe, we need to master the following method:
　　1. The screw rotation speed
　　Screw speed depends on the size, depends on the diameter size, speed to add, extrusion amount to add, material by shear force is big, helps material plasticizing, but the retention period of material in the screw is shorter, high strength of the pipe wall contrast rough, frictional heat pipe down, therefore, the screw rotation speed control should be based on output value, product appearance and function of physical and mechanical requirements all trade-offs.
　　2. The choice of materials
　　Pipe standard brand variety, countless, same a brand of raw materials to produce HDPE double-wall corrugated pipe but not produce PE water pipe. Here is still demand for manufacturers to identify themselves, choose the appropriate pipe material, the selection of time to test the material function.
　　3. The compressed air and speed of traction
　　Compressed air pipe shape and roundness, its pressure usually is 0.02 ~ 0.05 mpa, and should cooperate with extrusion speed and traction speed, usually drawing speed is 1% ~ 10% higher than pipe extrusion speed.
　　All, product appearance and function of physical and mechanical requirements.
　　4. The unstable temperature
　　Processing of hard PVC tubes, due to the processing temperature and differentiation temperature approached, produced in should strictly control the temperature of the material, the temperature is too low, plasticizing, high temperature, the material easy differentiation, temperature control should be based on the original formula, extruder, and the nose structure, rotating speed of screw elements such as judges, pay attention to the temperature measurement with appearance of error and the measurement point location.