Spiral steel pipe

Spiral-welded steel pipes refer to seamless steel pipes with seams on the surface, which are formed by bending and deforming steel strips or plates into circular, square, and other shapes before being welded. They can be classified into various types according to the welding method, such as arc-welded pipes, high-frequency or low-frequency resistance-welded pipes, gas-welded pipes, furnace-welded pipes, and Bondi pipes. Based on the seam shape, they can be divided into straight seam welded pipes and spiral seam welded pipes. Electric welded steel pipes are used in the oil drilling and mechanical manufacturing industries. Furnace-welded pipes can be used for water and coal gas pipelines, while large-diameter straight seam welded pipes are used for high-pressure oil and gas transmission. Spiral seam welded pipes are used for oil and gas transmission, pile foundations, and bridge piers. Welded steel pipes are more cost-effective and have higher production efficiency than seamless steel pipes.