There are mechanical, chemical and electrochemical methods for removing scale from stainless steel pipes. Due to the complexity of the scale composition of stainless steel pipes, it is not easy to remove the scale on the surface and make the surface highly clear and smooth. The removal of scale on stainless steel welded pipes generally takes two steps, one is pretreatment, and the other is ash removal.

Before the stainless steel welded pipe is processed and welded, the rust, oil, water, paint, etc. that are harmful to welding should be completely removed, and the welding rod suitable for the steel type should be selected. The processing time of stainless steel welded pipe is shorter than that of carbon steel spot welding, and stainless steel welded pipe brush should be used to remove welding slag. After welding, in order to prevent local corrosion or strength reduction, the surface should be ground or cleaned.

High-pressure boiler tubes are a type of boiler tubes and belong to the category of seamless steel tubes. The manufacturing method is the same as that of the seamless pipe, but there are strict requirements on the steel type used in the manufacture of the steel pipe.

​​​​​​​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.

For welded pipes of special materials, heat treatment must be carried out before and after welding, which is very important to the welding quality. The pre-heating of welded pipes made of special materials can not only slow down the cooling rate after welding, but also help hydrogen diffuse and escape from the weld metal to avoid hydrogen-induced cracking. At the same time, the degree of hardening of the weld seam and the heat-affected zone is reduced, and the crack resistance of the welded joint is improved.

Large-diameter LSAW pipes are widely used in natural gas, petroleum, chemical industry, octg pipe and other fields, and generally refer to straight seam steel pipes with an outer diameter of 500mm or more.