Double-sided submerged-arc spiral steel pipe
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Double-sided submerged-arc spiral steel pipe
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| Detailed Introduction
Double-sided submerged-arc spiral steel pipe feeds the strip steel into the welded pipe mill; as it passes through multiple sets of rolls, the strip gradually curls up to form a circular tube blank with an open seam. By adjusting the penetration depth of the squeeze rolls, the weld gap is maintained within 1–3 mm, and the two ends of the weld are kept flush. Spiral welded pipe is produced by using a forming machine to helically shape the raw strip steel, followed by internal and external submerged-arc welding, thereby manufacturing spirally welded pipes of various specifications.
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