Spiral-welded steel pipes are those made by bending and deforming steel strips or plates into circular, square, or other shapes and then welding them together, resulting in a longitudinally seam-welded pipe. 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 seam, they can be divided into straight seam and spiral seam pipes. Welded steel pipes are used in the oil and gas drilling industry and mechanical manufacturing. Furnace-welded pipes can be used for water and coal gas pipelines, while large-diameter straight seam pipes are used for high-pressure oil and gas transmission. Spiral seam pipes are used for oil and gas transmission, pile foundations, bridge piers, etc. Welded steel pipes are more cost-effective and have higher production efficiency compared to seamless steel pipes.