API 5L Gr.B steel plate for pipeline welding

API 5L Gr.B steel plate for pipeline according to the production process is divided into submerged arc welded steel pipe 8 kinds. But mainly the use of seamless steel pipe (Seamless), straight seam high frequency resistance welded steel pipe (Electric-Resistance Arc Welding, abbreviated as ERW), Longitudinal submerged arc welded pipe (Longigudinally Submerged Arc Welding, abbreviated as LSAW), spiral buried Arc welded pipe (Spirally Submerged Arc Welding, abbreviated as SSAW) and so on.

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