Application of large-diameter square steel pipes in steel structure buildings

Using large-diameter square steel pipes as building columns offers superior performance compared to round steel pipes. When utilized at building corners, these square pipes significantly enhance the effective use of space. In applications such as steel structure residences and high-rise buildings, large-diameter square steel pipes show considerable promise.

Steel is typically categorized into four types based on cross-sectional shapes: profiles, plates, pipes, and metal products. Profiles can be further divided into ordinary and high-quality categories, with ordinary profiles classified into large, medium, and small sizes according to current metal product standards. Ordinary profiles encompass various shapes, including I-beams, channel steels, angle steels, and round steels. Large-scale steel products like I-beams, channel steels, angle steels, and flat steels are primarily hot-rolled, while round, square, and hexagonal steels may also be forged or cold-drawn.

Welding large-diameter square steel pipes involves a complex process. Many manufacturers require seamless butt joints with no gaps, ensuring strength and integrity. To reinforce the butt joint, a cross rib can be welded in one section of the pipe, and a groove can be prepared at the joint to facilitate the welding process. Spot welding may also be applied to another rectangular pipe or H-shaped steel to maintain alignment. It is essential to note that optimal welding is not solely defined by minimizing deformation but by achieving welds that meet the specified performance requirements.

Currently, large-diameter square steel pipes find extensive applications across various industries, including machinery manufacturing, construction, metallurgy, agriculture (including greenhouses), the automotive industry, railways, road guardrails, container frames, furniture, decoration, and steel structures.