Octg pipe is an important way of energy protection. During the anticorrosion construction process of oil and gas pipelines, the surface treatment of LSAW pipes is one of the key factors 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 coating depends on factors such as coating type, coating quality and construction environment, and the surface treatment of straight seam steel pipes has an impact on the life of the anti-corrosion coating. About 50%. Therefore, it is necessary to strictly follow the requirements of the anti-corrosion layer specification for the surface of steel pipes, continuously explore and summarize, and continuously improve the surface treatment methods of steel pipes.
A method and production process for preventing straight seam steel pipes from breaking.
1. Cleaning of straight seam steel pipes Use solvents and emulsions to clean the steel surface to remove oil, grease, dust, lubricants and similar organic substances. However, it cannot remove rust, scale, welding flux, etc. on the surface of steel, so it is only used as an auxiliary means in anti-corrosion production
.
2. The tool derusting of straight seam steel pipes mainly uses tools such as wire brushes to polish the steel surface, which can remove loose or raised scale, rust, welding slag, etc. Hand tool derusting can reach Sa2 level, and power tool derusting can reach Sa3 level. If the iron oxide scale is firmly attached to the surface of the steel, the derusting effect of the tool is not ideal, and the anchor pattern depth required for anti-corrosion construction cannot be reached.
3. Pickling of straight seam steel pipes is generally done by chemical and electrolytic pickling methods, and only chemical pickling is used for pipeline anticorrosion. Can remove scale, rust, old coatings and is sometimes used as a post-blasting re-treatment. Although chemical cleaning can make the surface reach a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the environment.
It has been verified by research institutions that the life of the anti-corrosion coating depends on factors such as coating type, coating quality and construction environment, and the surface treatment of straight seam steel pipes has an impact on the life of the anti-corrosion coating. About 50%. Therefore, it is necessary to strictly follow the requirements of the anti-corrosion layer specification for the surface of steel pipes, continuously explore and summarize, and continuously improve the surface treatment methods of steel pipes.
A method and production process for preventing straight seam steel pipes from breaking.
1. Cleaning of straight seam steel pipes Use solvents and emulsions to clean the steel surface to remove oil, grease, dust, lubricants and similar organic substances. However, it cannot remove rust, scale, welding flux, etc. on the surface of steel, so it is only used as an auxiliary means in anti-corrosion production
.
2. The tool derusting of straight seam steel pipes mainly uses tools such as wire brushes to polish the steel surface, which can remove loose or raised scale, rust, welding slag, etc. Hand tool derusting can reach Sa2 level, and power tool derusting can reach Sa3 level. If the iron oxide scale is firmly attached to the surface of the steel, the derusting effect of the tool is not ideal, and the anchor pattern depth required for anti-corrosion construction cannot be reached.
3. Pickling of straight seam steel pipes is generally done by chemical and electrolytic pickling methods, and only chemical pickling is used for pipeline anticorrosion. Can remove scale, rust, old coatings and is sometimes used as a post-blasting re-treatment. Although chemical cleaning can make the surface reach a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the environment.
