Insulated steel pipe

Spiral-welded steel pipes are钢管 made by bending and forming steel strips or plates into circular, square, and other shapes, then焊接焊接 together, resulting in pipes with seams 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, furnace-welded pipes, and Bondi pipes, among others. Based on seam shape, they can be divided into straight seam-welded pipes and spiral seam-welded pipes. Arc-welded pipes are used in the oil and gas drilling industry and mechanical manufacturing. Furnace-welded pipes can be used for water and coal gas pipes, while large-diameter straight seam-welded pipes are suitable for high-pressure oil and gas transmission. Spiral seam-welded 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 than seamless steel pipes.