The following is the latest knowledge update about square tubes，Covering technological advancements、Market dynamics and industry news：

technical progress

High precision forming technology

Domestic square tube production enterprises have achieved the production of high-precision square and rectangular tubes，The dimensional accuracy can be stably achieved±0.05mmwithin。for example，Shanghai Jialeng Steel, with the assistance of North China University of Technology and Dalian Sangao Company，Developed a high-precision complex cross-section cold bending production line，Adopting guide column high stiffness frame、plug-in4Roller frame and other technologies。

In terms of high-precision detection technology，COPRA?Desktop cross-sectional scanners are widely used，Can achieve non-contact measurement of profile cross-section，And compare it with the ideal design section，Quickly and accurately determine deviations。

Flexible Forming Technology

The development of a new cold bending forming unit makes the specification adjustment of square tubes more flexible。for example，Cold bending forming unit with adjustable roll width developed by Dalian Fudi and other enterprises，Capable of quickly adapting to the production of products of different specifications。

New type of rolling mill structure（Such as floating memorial?archway mill）Further enhancing the flexibility and adaptability of square tube production。

New materials and new processes

Beijing University of Science and Technology has developed a new technology for the rolling die forming of large-diameter square tubes，Successfully achieved650×650mmbelow、Maximum wall thickness25mmForming of Square and Rectangular Tubes。

Linggang Steel Pipe Company has developed high-performance、High precision tower crane specific square tube，useQ355Bmaterial，wall thickness12mm，The strength is ordinary welded pipe1.94times。