Dear Team, During inspection we 2

[S.G]

Dear Team,

During inspection we observed that the weld-o-let fittings are not fitted or welded properly and have incomplete root penetration. Please note that this is a sour gas piping / on a reciprocating high-pressure gas compressor.

These spools are part of the compressor package and were fabricated at the packager's workshop and not on-site. The spools were hydro-tested have passed hydrostatic test. Please see attached pictures.

I would appreciate your advice on this, as our EPC contractor has submitted a technical query that this is acceptable.

Regards,

 

[DekDee]

S.G,
This is not just for you but anyone else interested in this subject.
The B31.3 committee is currently looking at the issue of NDT of Integrally Reinforced Fittings - extremely difficult to RT and in a lot of cases UT as well.
I have put forward an informal proposal that the weld attaching the fitting (Olet / Weldolet) to the run pipe must be visually inspected internally before the branch pipe is welded to the Olet / Weldolet).
Will see what eventuates.
Cheers,
Shane

 

[S.G]

Hello Shane (DekDee),

Thanks for the feedback. Much appreciated.

Regards,
Sohaib

 

[r6155]

My suggestions
1) Use a olet for welder performance qualification.
2)Visual inspection of the first pass of weld during fabrication
3)Acoustic emission test is the best practice during hydrostatic pressure test and in-service inspection.

Regards