方管 规格表
2种规格数据
方管是正方形和矩形截面的闭合截面钢管，比开口截面型钢具有更优的抗扭刚度。广泛用于设备框架、大门、储物结构和运输台车。厚度从t1.6到t9不等，易切割和焊接，外观整洁适合组装结构。
常见问题 (FAQ)
When should I choose square tube vs. round pipe?
Square tubes simplify flat welding and bolted connections, ideal for structural frames. Round pipes offer equal strength in all directions and better pressure performance. Frames typically use square tubes; piping uses round.
How do I distinguish between square and rectangular tube applications?
Square tubes suit columns and legs needing equal strength in both directions. Rectangular tubes suit beams where higher strength in one direction is needed — orient the long side in the load direction.
How do I select tube wall thickness (t)?
Determine by structural calculation based on load and span. General frames use t2.3–3.2mm; heavy structures use t4.5–6.0mm. Thicker walls mean more strength but also more weight.