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Details of inspection Visual examination of connection, shoulder, and tool joints and profile check of threads. Evaluated by handling damage, galling, washouts, fins, visibly non-flat shoulders, corrosion, weight /grade marking on tool joint.
Measurement or Go-No-Go gauging of pin and box OD, pin ID, shoulder width, tong space, box counterbore. Evaluated by torsional capacity of pin and box, adequate shoulder to support make-up stress, adequate gripping space for tongs.
Fluorescent wet magnetic particle inspection using DC current. Evaluated by existence of fatigue cracks.
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