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Spiral steel pipe is a spiral seam steel pipe made of strip coil plate, extruded at constant temperature and welded by automatic double-wire double-sided submerged arc welding process. The spiral steel pipe will send the strip into the welding pipe set. After being rolled by a multi-channel roll, the strip gradually rolls up to form a circular tube blank with an open gap. The pressure of the extrusion roll is adjusted so that the weld gap is controlled within 1~3mm and the two ends of the welding joint are flush.
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Galvanized steel pipe is welded steel pipe after decontamination and derusting treatment, and the internal and external surfaces are hot-dipped galvanized steel pipes.
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310L Stainless steel pipe rolling methods include hot rolling, hot extrusion and cold drawing stainless steel pipe. According to the different microstructure of stainless steel divided into half ferritic half martensitic stainless steel tube, martensitic stainless steel tube, austenitic system stainless steel tube, austenitic - ferritic iron series stainless steel tube.
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304L Stainless steel pipe rolling methods include hot rolling, hot extrusion and cold drawing stainless steel pipe. According to the different microstructure of stainless steel divided into half ferritic half martensitic stainless steel tube, martensitic stainless steel tube, austenitic system stainless steel tube, austenitic - ferritic iron series stainless steel tube.
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Seamless steel pipe is a kind of hollow section, a large number of pipe used for conveying fluid seamless steel pipe production process is the solid tube billet or steel ingot through the hollow tube, and then rolled into the required size of the steel pipe
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Seamless square steel pipe is a kind of hollow section, a large number of pipe used for conveying fluid seamless steel pipe production process is the solid tube billet or steel ingot through the hollow tube, and then rolled into the required size of the steel pipe
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Email : hjsteels@hjsteels.cn
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