×
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

visual inspection during hydrotest

visual inspection during hydrotest

visual inspection during hydrotest

(OP)
Dear Friends,
We are going to test a piping system which includes some underground and aboveground piping sections.
The system shall be tested as one package.
Can we eliminate the weld joints visual inspection for underground portion? (because we have to perform the wrapping before hydrotest).
Thank you

RE: visual inspection during hydrotest

Only if they don't leak.

RE: visual inspection during hydrotest

No you can't.  The codes specifically state that a visual inspection of joints is required.

"All joints, including welds and bonds, are to be left uninsulated and exposed for examination during leak testing, .. "

"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying."  Tony Hayward CEO BP
"Being GREEN isn't easy." Kermitfrog http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.liv

RE: visual inspection during hydrotest

What code are you working to ?

Most buried pipelines (pipeline design codes) are tested after they are backfilled. The test is of much longer duration in order for leaks to become noticeable.  

RE: visual inspection during hydrotest

(OP)
Dear Rneil,
The code is Api1104, but we have to test the buried pipe connected to aboveground totaly as one package.
 

RE: visual inspection during hydrotest

You asked if you can eliminate the weld joints visual inspection.  The answer to that is no.  For B31.3, 4 or 8.

For B31.3, you must be able to see the joints during testing.  For the pipeline codes you don't have to see them during testing and they could be buried after visual inspection, welding, coating and wrapping and the rest of the QA/QC work.   

In all cases you must visually inspect the welds as well as perform the other required QA/Qc work.

"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying."  Tony Hayward CEO BP
"Being GREEN isn't easy." Kermitfrog http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.liv

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