Spiral steel pipe

Spiral-welded steel pipes are those that are formed by bending and deforming steel strips or plates into circular, square, or other shapes and then welded together, resulting in a longitudinally seam-welded tube. 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, among others. They can also be classified by seam shape into straight seam-welded pipes and spiral seam-welded pipes. Welded steel pipes are used in the oil and gas drilling and mechanical manufacturing industries, among others. Furnace-welded pipes can be used for water and coal gas pipes, 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, bridge piers, etc. Welded steel pipes are more cost-effective and have higher production efficiency compared to seamless steel pipes.