In the field of construction, rectangular pipes can be used to support structures, frames, curtain walls, roofs, etc., and can withstand greater pressure and loads. In the field of engineering, rectangular pipes can be used to manufacture mechanical parts, tools, pipelines, etc., to meet a variety of complex engineering needs. In the field of manufacturing, rectangular tubes can be used to manufacture automobiles, aircraft, ships, etc., which can provide high-quality and high-strength structural support. When the square tube is applied, it is required to have a certain strength, stiffness and stability, and it is easy to process and install. In the field of construction, rectangular pipes are often used in the construction of high-rise buildings, Bridges, tunnels and other large projects, which can improve the safety and durability of the structure. In the field of engineering, rectangular pipes can be used to manufacture mechanical parts, tools, pipelines, etc., to meet a variety of complex engineering needs. In the field of manufacturing, rectangular tubes can be used to manufacture automobiles, aircraft, ships, etc., which can provide high-quality and high-strength structural support. In short, rectangular pipe is a kind of structural pipe widely used in various fields, which can meet the needs of different projects and has high practicality and reliability.