Submerged arc welded steel pipe: strip steel coil as raw material, regular temperature extrusion molding, automatic double-wire double-sided submerged arc welding process welded spiral seam steel pipe. Characteristics of submerged arc welded steel pipe: straight seam welded pipe production process is simple, high production efficiency, low cost, faster development. Spiral welded pipe strength is generally higher than the straight seam welded pipe, can use a narrower billet to produce a larger diameter welded pipe, but also can use the same width of the billet to produce a different diameter welded pipe. However, compared with the same length of straight seam pipe, the length of the welded seam increases by 30-100%, and the production speed is lower. Therefore, most of the smaller diameter welded pipes are welded with straight seam, and most of the large diameter welded pipes are welded with spiral.
