Spiral steel pipe (also known as spiral welded pipe or spiral seam submerged arc welded steel pipe) is a type of steel pipe produced by winding hot-rolled steel strip into a tube blank at a certain spiral angle and then welding along the seam. Due to its mature production process, low cost, and ability to produce large-diameter pipes, it is widely used in fields such as oil and gas transmission, urban pipeline network construction, and municipal engineering.