3PE anti-corrosion steel pipe inspection process

　　3PE anti-corrosion steel pipes this type of steel pipe has good anti-corrosion performance, so 3PE steel pipes are often used as buried steel pipes. However, 3PE anti-corrosion steel pipes need some preparations before they are buried. Today, the pipeline manufacturer will take you to understand the preparations for 3PE anti-corrosion steel pipes before they are buried.

　　Before understanding the coating, let us first briefly understand the advantages of 3PE anti-corrosion steel pipes: it combines the mechanical strength of steel pipes and the corrosion resistance of plastics; the outer wall coating is more than 2.5mm, scratch-resistant and bump-resistant; the inner wall friction coefficient is small, which can reduce energy consumption; the inner wall meets national health standards and is safe and harmless; the inner wall is smooth and not easy to scale, and has good self-cleaning function.

　　3PE anti-corrosion steel pipe inspection processFirst of all, the anti-corrosion steel pipe is inspected, and the steel pipe is inspected according to various conditions to make it meet the conditions for making the thermal insulation steel pipe. Check whether the steel pipe is corroded, check and remove the embroidery on the steel pipe. The next step is to put the rust and anti-corrosion steel pipe in a polyethylene casing for pipe forming. Then, after the head is repaired, the polyurethane foam is injected into it, and the gap should be fully filled to make it fully filled. Inspection of anti-corrosion steel pipes, and inspection of finished products for thermal insulation steel pipes.

　　3PE anti-corrosion steel pipe base material needs to check and record the steel pipe entering the pipe entry platform before the anti-corrosion treatment, and shot blasting and rust removal on the outer surface of the steel pipe, and then check whether the cleanliness of the outer surface of the steel pipe and the depth of the anchor pattern meet the requirements. Those that do not meet the requirements are polished and repaired by hand with a grinding wheel, and tape paper is wound around the pipe end, dust treatment, intermediate frequency heating to the required temperature, epoxy powder spraying, adhesive extruder side winding, PE extruder side winding and burning, anti-corrosion The pipes are cooled by water, and the qualified products are sprayed and marked, and the platform and stacking of the pipes are ready to be shipped.

　　3PE anticorrosion is generally composed of 3 layers:One layer of epoxy powder (FBE>100um)

　　Two-layer adhesive (AD) 170～250um

　　Three layers of polyethylene (PE) 2.5～3.7mm

　　In actual operation, the three materials are mixed and integrated, and after processing, they are firmly combined with the steel pipe to form an excellent anti-corrosion layer. Its processing methods are generally divided into two types: winding type and round mold wrapping type.

        3PE anti-corrosion steel pipe base material includes seamless steel pipe, spiral steel pipe and straight seam steel pipe. The three-layer polyethylene (3PE) anti-corrosion coating has been widely used in the oil pipeline industry due to its good corrosion resistance, water vapor permeability resistance and mechanical properties.