3"thk using RT?
![eek :eek:](/f2/epx.png)
Why must use two different NDT method?
Hard to guess, and difficult to pinpoint the problem in your post....there are many many solutions like using UT alone, or replace the welder, or hire a CWI to monitor the welding, get a welding consultant, buy the exact lenght of pipe without the need to weld etc etc.