The rectangular tube is a hollow long strip of steel, also known as a flat tube, a flat square tube or a square flat tube (as the name suggests). When the bending and torsional strength are the same, the weight is light, so it is widely used in the manufacture of mechanical parts and engineering structures. The rectangular tube is a hollow square section light thin-walled steel pipe, also known as steel refrigeration curved profile. It is a section steel of square cross-section shape made by Q235 hot-rolled or cold-rolled strip or coiled steel as the base material after cold bending forming and then high-frequency welding. In addition to the thickening of the wall thickness of the hot-rolled thick-walled square pipe, the corner size and the straightness of the edge are both at or above the level of the cold-formed square tube of the resistance welding. Construction, machinery manufacturing, steel construction projects, shipbuilding, solar power brackets, steel structure engineering, power engineering, power plants, agriculture and chemical machinery, glass curtain walls, automotive chassis, airports, etc.
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