What are the methods to extend the service life of square pipes?

I believe many people have seen square pipes. During the anti-corrosion construction process of oil (gas) pipelines, the surface treatment of square pipes is one of the key factors that determine the length of the anti-corrosion service life of the pipeline. It is whether the anti-corrosion layer and the rectangular pipe can be firmly combined. premise. So what issues should we pay attention to when using square pipes to extend the service life of square pipes? The editor will share it with you below. 1. Square tube tools for rust removal

Mainly use tools such as wire brushes to polish the surface of the square pipe to remove loose or lifted rust, oxide scale, welding slag, etc. The rust removal of hand tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the surface of square pipe and welded pipe is firmly adhered to the iron oxide scale, the rust removal effect of the tool will not be ideal, and the depth of anchor pattern required for anti-corrosion construction will not be reached. 2. Square tube surface cleaning

Use solvents and emulsions to clean the surface of rectangular tubes to remove oil, grease, dust, lubricants and similar organic matter. However, it cannot remove rust, oxide scale, flux, etc. on the surface of rectangular tubes, so it is only used as an auxiliary in anti-corrosion production. means.

3. Square tube spraying (throwing) rust removal

Spraying (throwing) rust removal uses a high-power motor to drive the spraying (throwing) blades to rotate at high speed, so that abrasives such as steel sand, steel shots, iron wire segments, minerals, etc. are sprayed (throwing) on the surface of the rectangular tube under the action of centrifugal force. Treatment can not only completely remove rust, oxides and dirt, but also achieve the required uniform roughness of square pipes and welded pipes under the action of violent impact and friction of abrasives.

After spraying (throwing) rust removal, it can not only expand the physical adsorption on the pipe surface, but also enhance the mechanical adhesion between the anti-corrosion layer and the pipe surface. Therefore, spraying (throwing) rust removal is an ideal rust removal method for pipeline anti-corrosion. Generally speaking, shot blasting (sand) rust removal is mainly used for the inner surface treatment of rectangular pipes, and shot blasting (sand) rust removal is mainly used for the outer surface treatment of steel pipes.

4. Pickling of square tubes

Generally, chemical and electrolytic methods are used for pickling treatment. Only chemical pickling is used for pipeline anti-corrosion, which can remove scale, rust, and old coatings. Sometimes it can be used as a reprocessing after sand blasting and rust removal. Although chemical cleaning can achieve a certain degree of cleanliness and roughness on the surface, its anchor lines are shallow and it can easily cause environmental pollution.

After listening to the introduction by the editor of the square tube manufacturer, do you have a certain understanding of the methods to extend the service life of square tubes? If you need help, you can contact the online customer service of our website, we will serve you wholeheartedly!