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The Difference Between Welded Square Tube and Seamless Square Tube

Date:2019-11-27View:795Tags:The Difference Between Welded Square Tube and Seamless Square Tube
Welded square tube is hollow square steel tube, also known as hollow cold bending section steel. The utility model relates to a section steel with square section, which is formed by taking hot-rolled or cold-rolled strip or coil as blank through high-frequency rolling after cold bending. In addition to increasing the wall thickness of seamless square tube, the corner size and edge straightness reach or exceed the level of resistance welded cold-formed square tube. The R angle is usually between two and three times the wall thickness. It can also generate the R square of the size required by customers according to their needs. The general length is 6 meters. The production process of welded steel pipe is simple, the production efficiency is high, the varieties and specifications are more, the equipment investment is less, but the comprehensive strength is lower than seamless steel pipe.


The seamless square tube is a long steel strip with a hollow part and no seam at the periphery, and is a square tube formed by the seamless tube passing through four sides of the mold. The square tube has a hollow part and is used as a conduit for conveying fluid. Mainly used in liquid transportation, hydraulic support, mechanical structure, medium and low pressure, high pressure boiler pipe, heat exchange pipe, natural gas, oil and other industries. It is stronger than welded square tube and will not crack. Generally speaking, welded square tube is formed by bending and welding of plates, so the compression capacity of mechanical properties is not as stable as seamless square tube, but welded square tube is undoubtedly super economical and efficient.