Cangzhou Steel Pipe Group (CSPG) Co., Ltd.

3PE anti-corrosion spiral steel pipe specific operating environment

The implementation of some projects requires a large number of oil and gas dedicated buried 3pe anti-corrosion steel pipe spiral gas pipeline as a transport medium. Long-distance oil and gas anti-corrosion steel pipe pipelines are hundreds of kilometers in engineering applications and thousands of kilometers long. They pass through different types of soil rivers and lakes, due to the heterogeneity of soil. Winter and summer freezes and melts. Groundwater level changes, The complex burial conditions such as the penetration of microbial stray currents on the coating of the roots of the plant cause complex corrosion of the organic sulphide, salt, formation water and mineral oxygen, so the anti-corrosion form of the buried oil pipeline All have anti-corrosion inside the pipeline, anti-corrosion outside the pipeline, cathodic care of the pipeline, and anti-corrosion of the pipeline on the ground. Requirements for anti-corrosion coating: Excellent corrosion resistance against soil, water, mold and construction. Excellent electrical insulation. Anti-corrosion coating should have the ability to resist cathodic disbonding strength when operating with cathode care. There is sufficient mechanical strength to ensure that the coating is not damaged by handling and soil pressure impregnation. It is one of the ways to prevent the corrosion of steel pipe roots by uniformly coating the paint on the rust-preventing anti-corrosion steel pipe and separating it from various corrosive media.

3PE anti-corrosion steel pipe base material includes seamless steel pipe, spiral steel pipe and straight seam steel pipe.

3PE anti-corrosion generally consists of a three-layer structure:

The first layer of epoxy powder (FBE>100um)

The second layer of adhesive (AD) 170 ~ 250um

The third layer of polyethylene (PE) is 1.8 to 3.7 mm

In the actual operation, the three materials are integrated into one body, and the steel is stably connected with the steel pipe to form an excellent anti-corrosion layer. The processing method is generally divided into two types:

entangled and round mold.