Longitudinal welded pipe has simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipe is generally higher than that of straight seam welded pipe. It can produce welded pipes with larger pipe diameters from narrower blanks, and can also produce welded pipes with different pipe diameters from blanks of the same width. 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.
Large diameter or thick welded pipes are generally made directly from steel blanks, while small welded pipes and thin-wall welded pipes only need to be directly welded through steel strips. Then after a simple polishing, drawing is fine
Supplement: The welded pipe is welded with strip steel, so it is not as high as a seamless pipe.
