In the anti -corrosion construction of oil and gas pipelines, straight steel pipes are used as common welded pipes, and their surface treatment is crucial. Because the service life of anticorrosive coatings is affected by multiple factors such as coating type, quality, and construction environment, the surface treatment of straight steel pipes occupies an important position, which directly affects the firmness and durability of the coating. According to professional institutions, the surface treatment of straight steel pipes contributes to 50%of the life life of the anti -corrosion layer. Therefore, we must strictly follow the surface anticorrosive coating specifications of straight steel pipes, and continuously optimize its surface treatment methods to ensure the long -term safe and stable operation of the oil and gas pipeline.
In the process of production and maintenance of straight steel pipes, rust removal is an indispensable part. The following introduces several common straight seam steel pipe rust removal methods:
First, cleaning is a preliminary rust removal step. Using specific solvents and emulsions, it can effectively remove impurities such as oil stains, fats, dust, and lubricants on the surface of the steel pipe. But it should be noted that this method cannot completely remove the rust.
Pickle is one of the more effective rust removal methods. In anticorrosive work, acidic chemicals are used to rinse rust to achieve the purpose of removing. However, the pickling process needs to be strictly controlled to avoid pollution to the environment. At the same time, it is necessary to ensure that the selected pickled drugs do not cause damage to the steel pipe.
Then the tool removing rust. Tools such as steel wire brushes are used to polish the surface of the steel pipe, which can remove loose oxide, rust, and welding slag. Manual tools can achieve SA2 rust removal effect, while electric tools can achieve higher rust removal levels.
Spraying rust removal is a more efficient rust removal method. The high -power motor drives the spray blades high -speed rotation, so that the abrasives such as steel balls and steel sand are sprayed on the surface of the steel pipe under the action of strong centrifugal force, which can not only completely remove the rust, but also enable the surface of the steel pipe to achieve the uniformity required, enhance the enhancement The adhesion of the anticorrosive layer and the surface of the steel pipe.
Shipping rust removal is mainly used for the treatment of the inside surface of the pipeline, while the surface of the straight seam steel pipe is commonly used to polish or sand -spraying. During the rust removal process, technical indicators must be strictly controlled to avoid secondary damage to steel pipes.
The straight -sewing steel pipes that have been treated with rust removal will be smoother, laying a good foundation for subsequent anti -corrosion treatment. This is not only an important technology in the production process of steel pipes, but also a key step in ensuring the quality and service life of steel pipes.
