1. Grinding of seamless steel pipe nozzles: After cutting, an angle grinder should be used to polish the plastic coating at the nozzles. The purpose is to avoid melting or even burning the plastic coating to damage the pipeline during flange welding. Use an angle grinder to sand the plastic layer of the nozzle.

2. Plastic coating of seamless steel pipe: After grinding, use oxygen and C2H2 to heat the nozzle on the outside of the pipe. If the internal plastic layer part is melted, the technical worker will apply the prepared plastic powder to the nozzle evenly. It should be noted that it must be applied in place, and the flange must be painted above the waterline. This process should strictly control the heating temperature. If the temperature is too high, bubbles will be generated during the coating process. If the temperature is too low, the plastic powder will not melt completely during the coating process. The phenomenon of the layer falling off, the seamless steel pipe part of the final pipeline is corroded and damaged.

3. Seamless steel pipe cutting: According to the actual required pipeline length, the metal pipe and toothless saw should be used for cutting the pipeline. When using water welding in the cutting process, there must be a protective method for the raw materials. When cutting, the fire-resistant and heat-resistant materials should be used as baffles at the ends of the fracture to catch the sparks and hot iron beans falling during the cutting to protect the The original plastic layer.

4.Seamless steel pipe connection: After the plastic filling is completed, connect the pipe to the pipe and install it. During the connection process, add rubber pads between the flanges and tighten the bolts to a sealed state.