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The strip is cut into narrow strips of steel, which are then moulded into tubes. A special welder then welds the seam together. External weld is polished. The inner burr of the general welded pipe is not played. Internal burrs are only used for precision welded pipes. Main products: seamless square pipe, large diameter square pipe, galvanized square pipe, welded pipe, seamless steel pipe, boiler pipe,
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