Rectangular steel pipe, rectangular steel pipe manufacturers, thick-walled rectangular steel pipe, seamless rectangular steel pipe, rectangular steel pipe suppliers square pipe, square pipe and rectangular pipe a call, that is, the side looks of the steel pipe. Is made of the strip after the treatment process volume. Generally strip after unpacking, flat, curled, welded to form a tube, and then cut to required lengths by the tube rolling into square tube. Generally 50 per package, also known as square and rectangular cold-formed hollow sections, referred to as the square tube and rectangular tubes, Code F and J, seamless square pipe wall thickness allowable deviation when the wall thickness is not greater than 10mm shall not exceed the nominal wall thickness of plus or minus 10%, ± 8% of the wall thickness, bends when the wall thickness is greater than 10 mm wall thickness and weld area except. 2, the seamless tube Rectangular usually Delivery length to 4000mm-12000mm, mostly to 6000mm and 12000mm. Seamless rectangular tube allows delivery of not less than 2000mm short foot and non-Length can also interface tube forms of delivery, but the demand side, the tube should be used to interface resection. Short feet and the weight of the non-Length products does not exceed 5% of the total deliveries for the theoretical weight greater than 20kg / m seamless rectangular tube should not exceed 10% of the total deliveries, seamless square pipe degree of curvature is not greater than 2mm per meter, the total bending of not more than 0.2% of the total length.