Spiral-welded steel pipes are those made by bending steel strips or plates into circular, square, or other shapes and then welding them together, resulting in pipes with a seam on the surface. They can be categorized by welding methods such as arc welding, high-frequency or low-frequency resistance welding, gas welding, furnace welding, and Bondi pipes. According to the shape of the weld, they can be divided into straight seam and spiral seam pipes. Electric welding pipes are used in oil and gas drilling, mechanical manufacturing, and other industries. Furnace-welded pipes can be used for water and coal gas pipes, while large-diameter straight seam pipes are used for high-pressure oil and gas transmission. Spiral-welded pipes are used for oil and gas transmission, pipe piles, bridge piers, etc. Welded steel pipes are more cost-effective and have higher production efficiency compared to seamless steel pipes.