Large diameter square tube: a large diameter square tube made by welding steel plates or steel strips after being curled and formed. Moreover, there are many varieties and specifications with high production efficiency, and this type of large-diameter square tube requires very little equipment and funding, making it suitable for the production of small galvanized large-diameter square tube manufacturers. However, in terms of strength, the strength of this type of steel pipe is far lower than the classification of seamless large-diameter square pipes. From the perspective of production technology, it is divided into large-diameter square pipes and cold-galvanized large-diameter square pipes. It is precisely because of the differences in the addition of these two types of galvanized large-diameter square pipes that many different physical and chemical properties are created Transporting gases or liquids: Square rectangular tubes can be used to transport gases or liquids such as wat…