Firstly, the steel sheet piles should be processed, and the surface defects should be treated well, and the length, width, lock shape and other components should be inspected. If there are affected weldments, they need to be disposed of in advance. If there is serious corrosion, the actual thickness needs to be measured and reduced.

The seamless steel pipe is made of high-quality round steel as the main material, and then the round steel is perforated. The principle of perforation is to use high temperature to soften the round steel, and then use the plug to remove all the solid parts in the middle to become hollow round steel, that is, seamless steel pipe.

There are many measures to prevent welding deformation of welded pipes. Due to the welding deformation of welded pipes is inevitable in welding production. In order to achieve the purpose of controlling the amount of deformation, one or more methods should be selected in production according to the specific type of welding structure.

Surface roughness refers to the small spacing and small peak-to-valley unevenness on the surface of the processed seamless steel pipe.

Submerged arc welding is a welding method in which an arc burns under a layer of flux. Submerged arc welded pipe mainly includes straight seam submerged arc welded pipe (LSAW) and spiral submerged arc welded pipe (SSAW)

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