1. Grinding of seamless steel pipe nozzles: Angle grinder should be used to polish the plastic coating at the nozzle after cutting. The purpose is to avoid melting or burning the plastic coating to damage the pipeline during flange welding. Using 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 every angle, 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. Layer peeling phenomenon, and finally the seamless steel pipe part of the pipeline was 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 and a toothless saw. 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 raw materials The original plastic layer.

4.Seamless steel pipe connection: After the plastic filling is completed, connect the pipe to the pipe fittings, add rubber pads between the flanges during the connection process, and tighten to the sealed state when tightening the bolts.

Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel pipe in China. We supply ERW steel pipe in high quality.