What are the standards for judging the quality of square pipes?

Square tube is a hollow square cross-section lightweight thin-walled steel tube, also known as steel cold-bent profile. It is a square section steel with a square cross-section shape and size made of Q235 hot-rolled or cold-rolled strip or coil as the base material, cold bending and then high-frequency welding. In addition to the thickening of the wall thickness, the corner size and edge straightness of hot-rolled extra thick-walled square tubes reach or even exceed the level of resistance welded cold-formed square tubes. It has good comprehensive mechanical properties, good weldability, cold and hot processing properties and corrosion resistance, and has good low-temperature toughness. The uses of square tubes include construction, machinery manufacturing, steel construction and other projects, shipbuilding, solar power generation brackets, steel structure engineering, power engineering, power plants, agricultural and chemical machinery, glass curtain walls, automobile chassis, airports, boiler construction, highway railings, House construction, pressure vessels, oil storage tanks, bridges, power station equipment, lifting and transportation machinery and other higher load welded structural parts, etc. With the development of the economy, more and more counterfeit products appear in society. In order to prevent yourself from being deceived when purchasing square pipes, you need to know some knowledge about how to judge the authenticity of square pipes: "We can Judge by observing the surface smoothness and flatness of the square tube. If the surface of the square tube is relatively flat, it can reflect that the square tube is good. On the contrary, if the surface is not so flat and the size and thickness are not standardized, then It can reflect that this square tube is an inferior product.”

The above are the standards for judging the quality of square tubes summarized by the editor of GNEE STEEL Building Materials for you. I hope it will be helpful to everyone!