Spiral-welded steel pipes are seamless steel pipes that are formed by bending and deforming steel strips or plates into circular, square, or other shapes and then welded together, with a seam on the surface. They can be categorized by welding methods into arc-welded pipes, high-frequency or low-frequency resistance-welded pipes, gas-welded pipes, forge-welded pipes, and Bondi pipes, among others. According to the shape of the seam, they can be classified into straight seam weld pipes and spiral seam weld pipes. Electric welded steel pipes are used in oil and gas drilling, mechanical manufacturing, and other industries. Forge-welded pipes can be used for water and coal gas pipes, while large-diameter straight seam weld pipes are used for high-pressure oil and gas transmission; spiral seam weld pipes are used for oil and gas transmission, pile pipes, pier piers, etc. Welded steel pipes are more cost-effective and have higher production efficiency than seamless steel pipes.