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                                       welded steel pipeWelded steel pipe refers to steel pipe or steel plate bending deformation into a round,Website:http://www.hrmpipefitting.com, square and other shapes and then welded into the surface of the joints of the steel pipe, welded steel pipe used in the billet is steel or strip.Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technologies, the quality of