METHOD OF MAGNETIC TAPE-TESTING OF MULTILAYER WELDED JOINTS Russian patent published in 1995 - IPC

FIELD: non-destructive inspection. SUBSTANCE: method involves the steps of: magnetizing a welded joint to be tested together with a magnetic tape applied to it by U-shaped electric magnet and determining quality of welded joint from the results of comparison of obtained magnetogram with a magnetogram obtained in the same way on the check specimen. The method is characterized in that preliminarily of the check specimen and inspected joint zones of maximum probability of the presence of flaws are selected in the transverse direction relative to the joint, comparison is performed in the respective zones and flaw parameters are determined considering that a flaw is the deeper, the closer to the joint symmetry plane it is disposed. EFFECT: enhanced reliability. 2 dwg