API 5L GR B Seamless Steel Pipe-ASTM A252 Spiral Steel Pipe_ASTM A106 GR B Carbon Steel Pipe_API 5L GR B Seamless Steel Pipe_ASTM A53 GR B Black Steel Pipe_BS1139 Scaffolding Tube_Longitudinal Submerged Arc Welded steel Pipe-Tianjin Xinyue Steel Group
FAQ

API 5L GR B Seamless Steel Pipe

API 5L Spec line pipe according to the provisions of the production process were divided into 8 kinds of seamless steel pipe, ERW steel pipe, submerged arc welded pipe and so on. But the most commonly used types are seamless steel pipe (Seamless), straight seam high frequency electric resistance welded pipe (Electric Resistance Welding, named as ERW), LSAW pipe (Longitudinally Submerged Arc Welding, named as LSAW), spiral submerged arc welded pipe ( Spirally Submerged Arc Welding, abbreviated as SSAW), etc.
Due to the limitation of seamless and ERW pipe size, the main line (generally larger diameter) usually use LSAW (with UOE based) and SSAW.

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