Hi Ramesh, Referring the UT of IBR drum, some brief considerations I hope will be helpful for you : 1. UT and RT are complementary and the best result is when you use the both; 2. For 100 mm thickness, UT achieves a better sensitivity than RT, especially for higher angled planar discontinuities, but lower (acceptable) accuracy in discontinuity sizing and diagnosis; Some minimum conditions are necessary for a well done UT: 1. Base material and filler material: close-grained unalloyed steel (or alloyed, but non-austenitic); 2.UT procedure containing (preferably) well known reference documents (ASME, EN, etc.) for UT technique and specific acceptance criteria agreed by client and/or national regulations (if pressure vessel, for example); 3. NDT (UT) certified and authorized personnel, at least level 2, according to (preferably) recognized standards (SNT-TC-1A, EN 473, etc.); 4. Calibrated ultrasonic instruments, transducers, reference blocks, etc.; 5. Part configuration enables the required directions of ultrasonic testing and assures the width of scanning area; 6. Scanning surface conditioning is necessary. Note: If IBR material is austenitic steel or other coarse-grained steel, UT can be possible but RT is better. --- On Sat, 4/10/10, Ramesh Barot <rameshnbarot@yahoo.com> wrote:
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