27.10. What is the role of the primary tube incision inspection?

The diameter and wall thickness of spiral seam double-sided submerged arc welded pipe are relatively large, and most of them are currently cut by plasma. In order to ensure the verticality of the cut and the pipe body, a synchronous trolley is used to drive the plasma cutting machine for cutting.
After the external welding is completed, the inspector conducts a preliminary inspection of the entire pipe weld and pipe body, marks the defects that need to be repaired, and enters the next process. The content of external inspection includes the surface quality of steel pipes, forming defects, welding defects and defects.