Spiral steel pipe, also known as spiral seam submerged arc welded steel pipe, is formed by bending and deforming steel strips or plates into circular or square shapes before welding.
Steel pipes with joints on the surface. It is mainly used for pipelines transporting oil and natural gas, and its specifications are represented by outer diameter * wall thickness. Spiral steel pipes can be welded on one side or on both sides.
The welded pipes should ensure that the water pressure test, tensile strength of the weld seam, and cold bending performance meet the requirements.