The straight seam steel pipe is mainly a production process of double-sided submerged arc welding. Products meet the requirements of relevant standards through multiple processes such as bending, external welding, straightening, seam welding, internal welding and flat end. Next, I will explain how to remove rust from straight seam steel pipes.

1. Cleaning straight seam steel pipe

Use solvent and emulsion to clean the surface of straight seam steel pipe to remove oil, grease, dust, lubricant and similar organic substances, but it cannot remove rust, oxide scale, welding flux, etc. The method of cleaning is only used as an auxiliary means.

2. Pickling straight seam steel pipe

Generally, there are two methods for pickling, chemical and electrolytic. The anti-corrosion of straight seam steel pipe only adopts chemical pickling, which can remove oxide scale, rust, and old coating. Sometimes it can be used as a retreatment after sandblasting and rust removal. Although chemical cleaning can make the surface achieve a certain degree of cleanliness and roughness, its anchor pattern is shallow and it is easy to cause pollution to the surrounding environment.

3. Tool rust removal

Mainly use tools such as wire brushes to grind the surface of straight seam steel pipes, which can remove loose oxide scale, rust, welding slag, etc. The rust removal of manual tools can reach Sa2 level, and the rust removal of power tools can reach Sa3 level. If the steel surface is adhered to a firm scale of iron oxide, the rust removal effect of the tools is not ideal, and the anchor pattern depth required for anti-corrosion construction cannot be achieved.

4. spray rust

Jet derusting is to drive the jet blades to rotate at a high speed through a high-power motor, so that abrasives such as steel shot, steel sand, iron wire segments, minerals, etc. are sprayed on the surface of the straight seam steel pipe under the powerful centrifugal force of the motor, which can not only completely remove oxides , rust and dirt, and the straight seam steel pipe can achieve the required uniform roughness under the action of the violent impact and friction of the abrasive.

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

In the production process, the relevant technical indicators of rust removal should be strictly required to prevent the damage to the straight seam steel pipe caused by operation errors. Embroidery is a technique that is often used in the steel pipe industry.

The above is the sharing of the relevant content of the straight seam steel pipe. I hope that you will have a further understanding of the rust removal of the straight seam steel pipe through the above content. If you have more questions, please contact Cangzhou Shenlong Pipe Manufacturing Co., Ltd. !