Welded steel pipes refer to steel pipes with seams on the surface that are welded by steel strips or steel plates that are bent and deformed into round or square shapes. The blanks used for welded steel pipes are steel plates or strip steels.
According to the weld shape, it can be divided into straight seam welded pipe and spiral welded pipe
Longitudinal welded pipe: simple production process, high production efficiency, low cost, and rapid development.
Spiral welded pipe: the strength is generally higher than that of the straight seam welded pipe. A narrower blank can be used to produce a larger diameter welded pipe, and the same width of the blank can also be used to produce a different diameter welded pipe. But compared with the straight seam pipe of the same length, the weld length is increased by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes use straight seam welding, and the large diameter welded pipes mostly use spiral welding.
Classified by use, it is divided into general welded pipes, galvanized welded pipes, oxygen-blowing welded pipes, wire casings, metric welded pipes, roller pipes, deep well pump pipes, automotive pipes, transformer pipes, electric welded thin-walled pipes, and electric welded special-shaped pipes. And spiral welded pipe.
