Q.Lack of fusion is vertical flaw Is it detected by 70 degree probe?BY V.SRINIVAS SCR BZA DIV
A. Lack of fusion is of course a vertical defect. AT weld is tested at high gain (sensitivity set with 3 mm hole). A vertical flaw will give signal by 70 degree but signal height may be small but due to high gain we are getting signal from vertical flaw. ANSWER BY PANT SIR