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welding black steel pipe

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  • [Industry News] Submerged arc welded pipes with some features

    What is the definition of submerged arc welded straight seam steel pipe?The submerged arc straight seam steel pipe body has a longitudinal weld, and when the diameter is greater than 914mm, two welds are allowed. The wire submerged arc filler welding is used. The submerged arc longitudinal seam stee

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