Spiral seam double-sided submerged arc welded pipes typically have relatively large diameters and wall thicknesses, and most often, plasma cutting is employed for this purpose. To ensure perpendicularity between the cut and the pipe body, a synchronized trolley is utilized to drive the plasma cutting machine.
After the completion of external welding, inspectors conduct an initial inspection of the entire pipe weld and pipe body, marking any areas with defects that require repair before proceeding to the next production step. The external inspection covers the surface quality of the steel pipe, forming defects, welding defects, and imperfections.
