Long-distance oil and gas pipelines are an important way of energy security. During the anticorrosion construction process of oil and gas pipelines, the surface treatment of straight seam steel pipes is the key factor determining the service life of pipeline anticorrosion. It is the premise of whether the anticorrosion layer can be firmly combined with the steel pipe. . It has been verified by research institutions that the life of the anti-corrosion layer depends on factors such as the type of coating, coating quality, and construction environment. The surface treatment of straight seam steel pipes has an impact on the life of the anti-corrosion layer. Standardize the requirements for the surface of steel pipes, continuously explore and summarize, and continuously improve the surface treatment methods of steel pipes.
1. The pickling of straight seam steel pipes generally adopts acid and electrolytic treatment. Pipe anticorrosion is simply chemical pickling that removes scale, rust, and old coatings. Sometimes it can be used for sandblasting and rust removal. Reprocessing. Although chemical cleaning can achieve a certain degree of cleanliness and roughness, its anchoring pattern is shallow and it is easy to pollute the environment.
2. The cleaning of straight seam steel pipes uses solvents and emulsions to clean the surface of the steel to remove oil, grease, dust, lubricants, and similar organic matter, but it cannot remove rust, scale, flux, etc. on the steel surface, so keep it. Production is for aid only.
3. Straight seam steel pipe corrosion tools mainly use tools such as wire brushes to polish the steel surface, which can remove loose or raised rust, rust residue, welding slag, etc. The rust removal of hand tools can reach the Sa2 level, and the rust removal of electric tools can reach the Sa3 level. If there is a strong oxidized iron scale attached to the steel surface, the de-rusting effect of the tool is not ideal, and the anchorage depth required for the anti-corrosion structure cannot be achieved.
Post time: Dec-27-2022