×
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

B31.3 Radiography Examination

B31.3 Radiography Examination

B31.3 Radiography Examination

(OP)
Hi,

I'm hoping someone can help me clarify the B31.3 radiography examination requirements.

As per B31.3 “Not less than 5% of circumferential butt and
miter groove welds shall be examined fully by random
radiography”

If a after a hydro 5% of the welds need to be radiographed. When you have few welded joints to test, does the 5% applies to the number of welded joints or to the total length welded?

If it’s to the number of welded joints, if I have total of 3 welds does that mean I have to test at least one full weld?

Thanks,
Andrew

RE: B31.3 Radiography Examination

Andrew,
I take "shall be examined fully" as stated in B31.3 to mean the complete circumferential weld. Also "not less than 5%" can obviously be more than that - even 33% in your described situation. So yes, I believe you should be testing at least one full weld.

I am a bit puzzled though by the bit about radiography after hydro. Radiography and any other NDE is meant to confirm integrity of welds prior to hydrotest, and hopefully highlight if any repair is required. I thought maybe a "golden weld" situation, as then you could have radiography after hydro, but can't be the case as that weld needs to be fully radiographed anyway, so the original question would not have been necessary.
Cheers,
John

RE: B31.3 Radiography Examination

Andrew,
I agree with Johns response.
The other thing to consider is how many welders ?
1 welder x 3 joints or 3 welders x 1 joint ?
Your inspection must cover all the welders so if 3 x welders you will have to RT 3 x joints.
Cheers,
DD

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