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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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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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Precision steel pipe is a kind of seamless steel pipe with high precision and high brightness produced by cold drawing or cold rolling process. Its inner and outer diameter size can be accurate to 0.1mm, in order to ensure the bending and torsional strength is the same, light weight, so it is widely used in the manufacture of precision machinery parts.
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Welded steel pipe refers to the steel pipe with joints on the surface after bending the steel strip or steel plate into a round or square shape. The blank used for welding steel pipe is steel plate or strip steel.
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Welded square steel pipe refers to the steel pipe with joints on the surface after bending the steel strip or steel plate into a round or square shape. The blank used for welding steel pipe is steel plate or strip steel.
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