Why spiral seam welded steel pipes are better than straight seam welded pipes? Click on the profile picture to enter the homepage for consultation. Spiral seam welded steel pipe is a type of welded pipe, which generally has higher strength than straight seam welded pipe. It can produce welded pipes with larger diameters using narrower billets, and can also produce welded pipes with different diameters using billets of the same width. However, compared to straight seam pipes of the same length, the weld length increases by 30% and the production speed is lower.