ASME B31.3-nde
ASME B31.3-nde
(OP)
Hi, I have an odd situation that I cannot find an appropriate answer to.
A closure weld has been performed, and subsequently RT was also performed. The rt passed and was acceptable but today this joint became internally accessible. The root could now be visually inspected (there was no plan for this prior) and upon inspection of the root pass it was found unacceptable. Excessive pen, burn through, and a portion of a tack had fallen onto the root and fused at one end. We have repaired the root by means of grinding. Does this joint need to be radiographed again now that it has been "worked" after the initial RT. Remember that somehow it passed the first time.
A closure weld has been performed, and subsequently RT was also performed. The rt passed and was acceptable but today this joint became internally accessible. The root could now be visually inspected (there was no plan for this prior) and upon inspection of the root pass it was found unacceptable. Excessive pen, burn through, and a portion of a tack had fallen onto the root and fused at one end. We have repaired the root by means of grinding. Does this joint need to be radiographed again now that it has been "worked" after the initial RT. Remember that somehow it passed the first time.





RE: ASME B31.3-nde
RE: ASME B31.3-nde
RE: ASME B31.3-nde
RE: ASME B31.3-nde
341.3.3 Defective Components and Workmanship.
Examination shall be as follows:
(a) When the defective item or work is repaired, the
repaired portion of the item or work shall be examined.
The examination shall use the same methods and acceptance
criteria employed for the original examination
Cheers,
Shane
RE: ASME B31.3-nde
RE: ASME B31.3-nde
opposite to this?
RE: ASME B31.3-nde
RE: ASME B31.3-nde
I don't see how some touch up grinding to smooth or blend in portions of the weld root would require additional RT.
I would agree RT would be necessary if a portion of the weld was excavated and rewelded. Depending on the extent of rewelding, PWHT may be required in addition to the RT if PWHT was a requirement for the initial weld.
I guess it comes down to terminology. A repair involving welding - RT needed.
A rework to blend in excessive reinforcement, improve weld profiles, etc. where no welding is necessary - requiring RT doesn't sound reasonable.
Best regards - Al
RE: ASME B31.3-nde
RE: ASME B31.3-nde
metengrs second post had not shown when I posted (maybe my stating "opposite" was incorrect).
I personally agree it should have RT but one thing has me unsure.
How do you identify any additional RT ?
It cannot be an R1 because the original film was deemed acceptable.
RE: ASME B31.3-nde
What I did find was "The examination shall use the same methods and acceptance
criteria employed for the original examination" is actually based on RT v UT or MT v PT.
I agree with Al's post but would like to pose a hypothetical question.
A weld on P1 piping is visually inspected by the contractor and passes.
It is then subsequently radiographed and passes.
The clients inspector then finds unacceptable undercut.
It is ground and rewelded.
Does it require additional RT ?
I would say no,volumetric integrity has been confirmed by initial RT and the repair was surface only - VT/MT only required.
Any thoughts ?
Cheers,
Shane
RE: ASME B31.3-nde
Best regards - Al
RE: ASME B31.3-nde
RE: ASME B31.3-nde
Not trying to argue - more trying to generate a bit of debate / discussion.
If the code allows minor repairs to be done after leak testing without subsequently retesting then why not allow minor surface repairs after RT or UT ?
Al,
I noted P1 material (eg. 106 Gr B) in my earlier post.
Agree with you 100% if the materials are P-Nos. 3, 4, 5A, 5B, 5C, and 15E due to PWHT requirements but unsure on why P1 would require it ?
As noted previously, how do you identify a repair weld if the original RT passed ?
Cheers,
Shane
RE: ASME B31.3-nde
I concur with DekDee in that if a weld has been rejected (visually or per RT), and can be repaired using minor surface grinding (e.gf. excess root weld penetration), then that should be OK. However, that should then be verified (if Im not mistaken) with a NDE method that also highlighted the defect.
RE: ASME B31.3-nde
I will concede there are several questions that are unanswered, information not provided by the initial question, so we can only respond based on the information offered.
Best regards - Al
RE: ASME B31.3-nde