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 spread the pipe mouth with the prepared plastic powder , It should be noted that it must be applied in place, and the flange plate shall be painted above the water stop line. This process should strictly control the heating temperature. If the temperature is too high, bubbles will be generated during the plastic coating process. If the temperature is too low, the plastic powder will not melt completely during the plastic coating process. The above conditions will produce plastic after the pipeline is put into use. The phenomenon of layer peeling, and finally the seamless steel pipe part of the pipeline is corroded and damaged.
4. Seamless steel pipe pipe connection: After the plastic repair is completed, the pipe and the pipe fittings are connected and installed, and the rubber pad is added between the flanges during the connection process, and the bolts are tightened to the sealed state.
Tips: A53 ERW pipe is a typical carbon steel pipe. It is largely used to convey fluids at low / medium pressures such as oil, gas, steam, water, air and also for mechanical applications.