Butt weld: It is a circular weld formed by joining two steel pipes together.
Steel strip butt welding seam: It is the welding seam where the steel plate or steel strip on the spiral seam steel pipe is connected head to tail.
Tacking weld: It is a weld used to fix the butt edges before final welding.
Large diameter spiral steel pipe weld surface requirements
The shape of the weld seam of large-diameter spiral steel pipe should be uniform and regular, with gentle transition, and the surface of the weld seam should be free of defects such as arc breakage, burn-through, cracks, scarring, folding, and arc craters.
