Rectangular pipe is a kind of hollow pipe with square or rectangular cross-section. It belongs to a kind of steel pipe, mostly with small caliber. When the bending and torsional strength are the same, the weight is lighter, so it is widely used in manufacturing mechanical parts and engineering structures. Dimension:20mm*20mm-1000mm*1000mm Wall Thickness:2mm-35mm Steel Grade:Q195, Q235, Q345(16Mn), STKR400/490, A500, ST37/44/52, S235, S275, S355, etc. Standard:JISG3466,DIN EN 10210,DIN EN10219,ASTM A500,GB/T 3094-2000,GB/T 6728-2002 Surface Treatment: anti-rust oil, black painting, galvanizing Packing:in bundles with steel strips or in bulk as per the loading requirements Applications:Construction framework, trestle, motorcar cassis,flight terminal framework, shipbuilding, automobile axle pipe, MRT and so on. Rectangular pipe is a kind of hollow pipe with square or rectangular cross-section. It belongs to a kind of steel pipe, mostly with small caliber.