How to perform non-destructive testing on the L360 LSAW pipe surface?

The selection principle of the surface non-destructive testing method of L360 LSAW pipe: for ferromagnetic steel pipes, magnetic particle testing should be used; for non-ferromagnetic steel pipes, penetration testing should be used.

For welded joints with delayed cracking tendency, the surface non-destructive inspection shall be carried out after the welding cooling time; for welded joints with reheat cracking tendency, the surface non-destructive examination shall be carried out after welding and after heat treatment.

The application of surface non-destructive testing is carried out in accordance with the requirements of the standard, and the detection objects and applications are generally as follows:

(1) L360 LSAW pipe material outer surface quality inspection.

(2) Detection of surface defects of important butt welds.

(3) Detection of surface defects of important fillet welds.

(4) Detection of surface defects in the welded joints of important socket welding and jumper three-way branch pipes.

(5) Surface defect detection after pipe bending.

(6) Groove detection of welded joints with larger material quenching tendency.

(7) Detection of grooves for non-austenitic stainless steel pipes whose design temperature is lower than or equal to -29 degrees Celsius.

(8) Double-sided weldments require root-removal welds and inspection after root-removal

(9) When using oxyacetylene flame to cut welding fixtures on alloy pipes with a tendency to harden, detect the defects in the grinding parts.