Surface Treatment Method of LSAW Steel Pipe

1. Cleaning

Grease, dust, lubricants, and organic matter adhering to the surface of the LSAW steel pipe, usually we use solvents and emulsions to clean the surface. However, the rust, oxide scale, and welding slag on the surface of the steel pipe cannot be removed, so that it needs tools.

2. Tools to remove rust

Steel pipe surface oxide scale, rust, welding slag, wire brush can be used to clean and polish the surface treatment. There are two types of tool rust removal: manual and power. Hand tools can reach Sa2 level, and power tools can reach Sa3 level.

3. Pickling

Common pickling includes chemical and electrolytic methods. However, only chemical pickling is used for anticorrosion of pipelines. Chemical pickling can able to get a certain degree of cleanliness and roughness on the surface of the steel pipe, which is convenient for subsequent anchor lines. Usually used as a reprocessing after shot blasting (sand).

4. Shot blasting to remove rust

The high-power motor drives the blades to rotate at high speed, so that steel grit, steel shot, iron wire segments, minerals and other abrasives are sprayed and projected on the surface of the steel pipe under the action of centrifugal force. On the one hand, rust, oxide and dirt are completely removed, on the other hand. The steel pipe achieves the required uniform roughness under the action of the violent impact and friction of the abrasive.

Among the four treatment methods, shot blasting is the most ideal treatment method for pipeline rust removal. Generally, shot blasting is mainly used for inner surface treatment of steel pipes, and shot blasting is mainly used for outer surface treatment of steel pipes.

Changsha Xiangjia Metal Materical Co., Ltd. the Steel Pipe Division of ADTO GROUP, is one of the leading manufacturers of steel products in China. We specializes in manufacturing all kinds of steel pipe in various grades and sizes. Years of production experience and manufacturing facilities who have a capacity of 200,000 tons per annual will ensure the good quality and competitive duration of our products.