Penetration welds
Penetration welds
(OP)
Can you advise the following. Is there a section in AWS D1.1 that advises on level of NDT with regards to the following
complete Joint penetration welds. What is level of 100% NDT UT & MT ?
Partial Joint penetration welds. what level of NDT 100% MT?
complete Joint penetration welds. What is level of 100% NDT UT & MT ?
Partial Joint penetration welds. what level of NDT 100% MT?





RE: Penetration welds
Is the job specfication silent on this subject?
RE: Penetration welds
Generally fillet welds and partial penetration welds require visual inspection of fit-up prior to welding, and completed welds. NDT can be used if welds are completed and effective weld sizes cannot be determined.
Note that complete penetration welds rely on the lack of discontinuities to develop the full strength of the welded parts. Discontinuities can result is stress risers and/or cracks which significantly reduce the weld strength. Many fabricators NDT 100% of their CJP welds as part of their internal QC program.
http://www.FerrellEngineering.com
RE: Penetration welds
Best regards - Al