The simple and simple process flow of spiral seam submerged arc welded steel pipe production:
① Inspect the spiral seam submerged arc welded steel pipes to make them suitable for the conditions for making insulated steel pipes, and inspect the steel pipes based on various conditions;
② Remove the embroidery on the steel pipe and use some special materials to clear the rust on the surface of the steel pipe so that the steel pipe will not be corroded;
③Pipe forming, place the rust-removed and anti-corrosion steel pipe in a polyethylene casing;
④ Repair the head and inject polyurethane foam into the center to fill the space between the steel pipe and the polyethylene casing to make them integrated;
⑤ Product inspection: inspect the finished spiral seam submerged arc welded steel pipes, sell products that meet the specifications, and renovate and improve unsuitable products.

As long as the rust-free and anti-corrosion steel pipe is placed in a polyethylene casing, polyurethane foam is injected in the center to fill the space between the steel pipe and the polyethylene casing, so that the steel pipe, casing, and insulation layer form a stable body. To achieve the effect of anti-corrosion and heat preservation, the insulated steel pipe is formed. This anti-corrosion and insulation method of insulated steel pipes can be placed or buried underground. The entire construction process can be carried out on-site, which is convenient for construction and operation. It is also easy to be controlled by the construction personnel and the process is relatively simple.