METHOD FOR RADIOGRAPHIC INSPECTION OF WELDED JOINTS Russian patent published in 2015 - IPC G01N23/18 

FIELD: physics.

SUBSTANCE: method includes illuminating welded joints fitted with defect sample-imitators with ionising radiation and determining the type and size of the detected defects of the welded joints; measuring, during angular illumination, the angle α between the direction of illumination and the plane of the welded joint; measuring, on the picture, the length L_pr. of the projection of defects of the type of pores stretched on the cross-section of the joint and calculating the size of said defects on the cross-section of the joint Δd_sec. for the condition of vertical orientation thereof in the plane of the joint; and during normal illumination - in the direction of the plane of the joint, with impossible or difficult comparative estimation of the size Δd_sec. of vertical pores, using defect sample-imitators, the method includes performing additional illumination of the welded joint at an angle to the plane of the joint and calculating the size Δd_sec., similarly to that performed with angular illumination, based on the measured illumination angle α and the measured length L_pr. of the projection of the vertical pores on the additional picture.

EFFECT: high information value and reliability of radiographic inspection of welded joints.

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