2. Seamless steel pipe plastic coating treatment: after polishing, use oxygen and C2H2 to heat the pipe mouth outside the pipe until the internal plastic layer is melted, and then the skilled worker will evenly apply the prepared plastic powder to the pipe mouth , It should be noted that it must be applied in place, and the flange plate shall be painted above the water stop line. In this process, the heating temperature should be strictly controlled. If the temperature is too high, there will be bubbles during the coating process. How much is the seamless pipe? If the temperature is too low, the plastic powder will not melt completely during the coating process. The above conditions are in the pipeline After being put into use, the plastic layer will fall off, and eventually the seamless steel pipe part of the pipeline will be corroded and damaged.
3. Seamless steel pipe cutting: According to the actual length of the pipeline, the pipe should be cut with a metal saw or a toothless saw. In the cutting process, there must be a method of protecting raw materials when using water welding. When cutting, fire-resistant and heat-resistant materials should be used as baffles to capture sparks and hot iron beans during cutting to protect the original plastic layer of the raw materials.