Spiral submerged arc welded steel pipe

　　It is a spiral seam steel pipe with strip coil as the raw material, often warm-extruded, and welded by automatic double-wire double-sided submerged arc welding.

　　The characteristics of spiral submerged arc welded pipe: straight seam welded pipe has simple production process, high production efficiency, low cost and rapid development. The strength of spiral welded pipes is generally higher than that of straight seam welded pipes. Welded pipes with larger diameters can be produced from narrower billets. Welded pipes with different diameters can also be produced with billets of the same width. Therefore, most of the smaller-diameter welded pipes are straight seam welded, and large-diameter welded pipes are mostly spiral welded.

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