Thanks for ur explain about inspection of Drill pipe used UT sear wave... Please upload again with detail caibration used V1 and V2 include side drillhole and etc.. GOD Blessing u too 😇🙏..
Best if you have the probe where the contact surface is same contour of the pipe diameter then we just have to scan in the direction of the circumference of the pipe. actually, even with longitudinal scanning and ordinary probes, you can detect even the longitudinal crack. We have tried that in the past and able to detect longitudinal cracked non-mag collar.