Pipe socket welding seam detection issues

Regarding the question of why the fillet welds of socket welded pipes are not subject to radiographic testing but replaced by magnetic particle testing or penetrant testing, the main reason is that the socket welding hoop needs to undergo heat treatment during installation, which will reduce the sensitivity of radiographic testing and make it difficult to detect defects. In contrast, magnetic particle inspection and penetrant inspection can detect more subtle defects and are therefore more suitable for socket weld ferrule inspection. At the same time, magnetic particle testing and penetrant testing are also more convenient, faster, and lower cost, so they are widely used. It should be noted that when using magnetic particle testing and penetrant testing, relevant testing standards and requirements must be followed to ensure the accuracy and effectiveness of testing. .

Because the thickness of the welded parts of the pipeline is inconsistent, and the wall thickness on both sides of the weld is generally very different, the radiation exposure time cannot be unified. Knowing this principle, there is a way to use radiographic flaw detection through hard work.

The statements and difficulties encountered by flaw detectors who have worked for a long time. excerpt

How do you do X-rays on fillet welds? The thickness in each direction is different. Should we do an NMR?

It’s not that I don’t want to, it’s just that I can’t do it. Asking this question shows that you haven’t had much contact with RT.