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Difference in ERW and SAWL steel pipe

ERW and SAWL steel pipe Straight seam welded steel pipe, according to welding process can be divided into high frequency resistance welding (ERW Steel Pipe) and submerged arc welding (SAWL Steel Pipe), longitudinal submerged arc welded is short for SAWL, high-frequency straight seam resistance welding is short for ERW. High...
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