Square rectangular pipe, is square pipe and rectangular pipe a name, that is, the length of the same and not equal steel pipe.It is made of strip steel by technological treatment.The strip is usually unpacked, flat, rolled and welded to form a tube, which is then rolled into a square tube and then cut to a desired length.
1. The allowable deviation of the wall thickness of rectangular pipe shall not exceed plus or minus 10% of the nominal wall thickness when the wall thickness is no more than 10mm, plus or minus 8% of the nominal wall thickness when the wall thickness is more than 10mm, except for the wall thickness of corners and welding seams.
2. The normal delivery length of rectangular pipe is 4000mm-12000mm, with 6000mm and 12000mm being the majority.Square rectangular pipe is allowed to deliver short and non-fixed size products not less than 2000mm, and can also be delivered in the form of interface pipe, but the user should remove the interface pipe when using.The weight of short and non-fixed size products shall not exceed 5% of the total delivery quantity, and for square rectangular pipes with theoretical weight greater than 20kg/m, the weight shall not exceed 10% of the total delivery quantity
3. The bending degree of rectangular pipe shall not be greater than 2mm per meter and the total bending degree shall not be greater than 0.2% of the total length
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