Welding operator qualification for full structural weld overlay repair

[stanweld99]

For full structural weld overlay repair, the welding procedure is qualified per ASME IX QW-202.3. Should welding operator qualification be on groove joint design or overlay joint prep?

 

[metengr]

Groove weld qualifies for both groove and ......

QW-202.3 Weld Repair and Buildup. WPS qualified
on groove welds shall be applicable for weld repairs to
groove and fillet welds and for weld buildup under the following
provisions:.....

 

[stanweld99]

Metengr:
Thanks for the response. for the mentioned full structural weld overlay repair, per Section Ix for procedure and operator qualification, I am planning:
1. PQR on groove weld per QW-202.3
2. prepare WPS for overlay application
3. Qualify welding operator on overlay weld (not groove weld)

Please suggest if item 3 meeting ASME IX requirements.

Thanks

 

[metengr]

The welder performance qualification will be per a groove weld.

QW-303.1 Groove Welds — General. Welders and
welding operators who pass the required tests for groove
welds in the test positions of Table QW-461.9 shall be qualified
for the positions of groove welds and fillet welds
shown in Table QW-461.9. In addition, welders and welding
operators who pass the required tests for groove
welds shall also be qualified to make fillet welds in all
thicknesses and pipe diameters of any size within the limits
of the welding variables of QW-350 or QW-360, as
applicable.

 

[stanweld99]

Metengr:

The main point is the actual welding is not groove weld or fillet weld, it is overlay outside the surface of the pipe.

 

[DekDee]

stanweld99,
See QW 381, 382 & 383.
You have not noted if it is corrosion resistant overlay, hardfacing overlay or cladding so you will have to decide which is applicable to your situation.
Cheers,
DD

 

[stanweld99]

Thanks DD for the reply.

The overlay is for structual reinforcement and is structural weld overlay. Should not be classified as corrosion resistant overlay, hardfacing overlay or cladding per Section Ix Qualification.

Can we conclude that ASME IX does not cover this for WPQ?

 

[DekDee]

stanweld99,
You are the only one who can answer your question.
What is your fabrication code ?
If it is structural welding with no contact with a pressure containing item then ASME IX would not be applicable ( but your specifications may say otherwise - heaven forbid !!)
Good luck,
DD

 

[metengr]

stanweld99;
Look again in Section IX, a weld build-up can be for structural purposes either to restore wall thickness or to add material. It is handled under a groove weld procedure and operator qualification.

 

[stanweld99]

DD: the application is similar per code case N-504