Welded Shaft Ultrasonic Test Standards with Flaw Certificates - Steel - 6 samples Additional photos, weights and dimensions attached in Description Below or Download Excel Sheet. Welded shafts with known flaw sizes and locations described in the accompanying FlawTech certificates. Can be used for Probability of Detection studies or UT equipment training & qualification. See attached samples, Six steel welded shafts with known flaw sizes for UT inspection qualification and calibration. (Located: 1 River Road, Schenectady, NY 12345)