The anti-corrosion spiral welded pipe has single-sided welding and double-sided welding. The welded pipe should ensure the hydrostatic test, the tensile strength of the weld and the cold bending performance must meet the requirements.

Butt welding seam: It is a circular weld formed by connecting two sections of steel pipes together.

Tack welding seam: It is the welding seam used to fix the butt edge before the final welding.

Steel strip butt welding seam: The steel strip butt welding seam is the welding seam of the steel plate or steel strip on the spiral seam steel pipe.

Anti-corrosion spiral welded pipe is made by rolling a low-carbon carbon structural steel or low-alloy structural steel steel strip into a tube blank at a certain spiral angle (also called forming angle), and then welding the seam of the tube. It can be narrower Strips produce large diameter steel pipes. Spiral steel pipe is used for oil and gas pipelines. Spiral steel pipes are welded on one side and on both sides. Welded pipes shall ensure the hydrostatic test, tensile strength of welds and cold bending functions to comply with the rules.