UT weld Testing to Replace RT Testing
UT weld Testing to Replace RT Testing
(OP)
I have a client spec. that requires RT Testing of CJP welds, and a fabricator who wants to
use UT Testing instead? I'm wondering if anyone has feedback regarding the reliability of UT testing as compared with RT. Will UT testing miss flaws that would be detected by RT?
Have you had issues with lack of permanent hard copy record from UT Testing?
The application is general structural steel fabrication inspection.
Thanks
use UT Testing instead? I'm wondering if anyone has feedback regarding the reliability of UT testing as compared with RT. Will UT testing miss flaws that would be detected by RT?
Have you had issues with lack of permanent hard copy record from UT Testing?
The application is general structural steel fabrication inspection.
Thanks






RE: UT weld Testing to Replace RT Testing
Although the above reference allows UT of 5/16" thick material, I do not recommend its use below 3/8", as I have found the results to be inconsistent.
RE: UT weld Testing to Replace RT Testing
Any method is operator dependant. Make sure that the person doing the testing is certified. In the US, that certification would typically be at least a Level II ASNT certification.
The reason that there is usually no "hard copy" of the UT results is that it is the operator's interpretation of an oscilliscope image. If you were give an RT film would you be able to interpret that in accordance with the applicable code? Probably not unless you were experienced and certified for RT. You can request a screen shot of the UT image...but it won't tell you much.
UT is much more common and readily available than UT for general structural work. I would have no hesitation to use either for the appropriate application.
Background....former Certified Welding Inspector, ASNT Level 1 UT, ASNT Level 3 radiographer.
RE: UT weld Testing to Replace RT Testing