METHOD OF MAGNETIC INSPECTION OF WELDED SEAMS Russian patent published in 1995 - IPC

FIELD: non-destructive inspection. SUBSTANCE: method involves the steps of: magnetizing a welded seam with adjacent area near the seam, reading-out topography of magnetic relief of a portion being inspected near the seam and determining the presence of flaws from a magnetogram, deriving the information on a flaw position from the results of comparing amplitudes of signals read-out at the same distances from the edges of welded seam taking into account that the distance from the flaw center to the edges of welded seam is proportional to amplitudes of signals. EFFECT: enhanced reliability. 1 dwg, 1 tbl