The manufacturing of spiral weld pipes with 2-Step technology corresponds with the technique of longitudinal welded pipes, where pipe forming is separated from the submerged-arc welding process.
After pipe forming and continuous tack-welding on the Spiral Pipe Machine, the pipe is transferred to the Submerged-Arc Final Welding Machines (FWM), where the tack-welded pipe seam is permanently (final) welded using the multi-wire submerged-arc welding process.
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