The use of square pipes has penetrated into all areas of our society, but steel products have a shortcoming that is oxidized and rusted, and corrosion protection is imminent. There are many anti-corrosion processes such as oiling, galvanizing, and spraying, each with its advantages and disadvantages

Carbon steel pipes with square and rectangular (rectangular) cross-sections:　　 Weight unit per meter: kg/m (kilogram/meter) & lb/ft (lb/ft)　Commonly used square tube calculation formula 1:　　(Length + width)×2÷3.14-thickness×thickness×0.02466= kg/m　　 Formula 2:　　Kg/m = (Oc-4Wt) * Wt * 0.00785

The inspection and acceptance of straight seam steel pipes shall be carried out by the technical supervision department of the supplier. The supplier needs to ensure that the straight seam steel pipe meets the requirements of the corresponding product standards at the time of delivery. The purch