×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Welding - repairs to repairs

Welding - repairs to repairs

Welding - repairs to repairs

(OP)
Hi,

I have a carbon steel presure vessel with a 6"NB XXS nozzzle which is terminated in a pipe cap.
X-ray of the nozzle to pipecap weld found a defect in the weld which has been repaired.
However, x-ray of the repair has shown a defect in the repaired weld (albeit not as bad as the original defect).

Am I ok to repair the repair ?

Are there any restrictions concerning repairs of repairs, can I go on as many times as is needed until they get it right ?

Advice will be appreciated.

RE: Welding - repairs to repairs

You can only repair 3 times, other than that, go for it. After 3 repairs then the weld is to be completely removed and rewelded.

RE: Welding - repairs to repairs

Search in ASME Section VIII div 1, paragraphs: UW-38, UW-51.

Regards,

Luis C.

RE: Welding - repairs to repairs

After 3 repairs??????????? Where did this advice come from? You can weld repair as many times as needed provided total PWHT time is factored into the WPS used for the repair, if PWHT is applicable. If not, there is no limit on weld repairs provided NDT is performed before and after repairs.

RE: Welding - repairs to repairs

Generally, most client specifications will not allow any repair without a qualified repair weld procedure, and they generally restrict the number of repairs to those number of repair cycles qualified.

Back to the ASME codes, and others for that matter, as metengr noted, the number of PWHT cycles is a essential variable and will need to be qualified. I have used and seen many client specification that state that WPS's need to be qualified with a minimum of 3 PWHT cycles.

RE: Welding - repairs to repairs

(OP)
Thanks guys, I think that tells me what to do.
Cheers

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources