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A53 pipe comes in three types and two grades, A53 Type F, which is longitudinally furnace butt welded or continuous welded (Grade A only), A53 Type E, which is longitudinally electric resistance welded (Grades A and B), and A53 Type S, which is seamless pipe, produced by hot working, and possibly cold finishing, the steel (Grades A and B). China Hot DIP Galvanizing Layer Thick ERW Welded/Hot Construction Carbon Black ERW Welded Round Steel Pipe Hot DIPChina Hot DIP Galvanizing Layer Thick ERW Welded/Hot Rolled/Cold Rolled Galvanized Steel Pipe, Find details about China Galvanized Carbon Steel Pipe, Hot DIP Galvanized Steel Pipe from Hot DIP Galvanizing Layer Thick ERW Welded/Hot Rolled/Cold Rolled Galvanized Steel Pipe

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