×
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

Pipeline repair - wall thickness for new weld tie-in

Pipeline repair - wall thickness for new weld tie-in

Pipeline repair - wall thickness for new weld tie-in

(OP)
Hello, can anyone tell me guidelines/codes used when making a new weld into exisitng piping, specifically if there is corrosion or some other indication in the existing pipe, what are acceptable limits of the corrosion or indications where the new weld will be? Situation involves gas tranismission pipeline, tie-in for a new pup or spool piece, and inspection of the tie-in point where the new circumferential welds will be has shown corrosion. Thank you.

RE: Pipeline repair - wall thickness for new weld tie-in

brimmer

If you're in the US, I'd say ASME B31.8 for acceptable limits and API 1104 for welding.

Greg Lamberson, BS, MBA
Consultant - Upstream Energy
Website: www.oil-gas-consulting.com
 

RE: Pipeline repair - wall thickness for new weld tie-in

ASME Section IX for welding procedure qualification and welder qualification in the US.

RE: Pipeline repair - wall thickness for new weld tie-in

If corrosion is found during the pre-welding inspection, the pipeline owner will have to advise of its acceptability based on a fitness for service analysis incorporating the presence of any future girth weld to be made.  Bear in mind that you might not want a great corrosion pit in the weld zone showing up on the radiograph of your nice, pristine weld and having it rejected!

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

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