ASME pressure vessel internal pitting weld build-up repair 1

[mariolucas75]

Dear Forum,

Would you please advise on the following:
The ASME vessel internal pitting was repaired by weld-build up. Now the question is to inspect the applied weld.
I was thinking it all goes with PCC-2, but recently read about NBIC and got confused... so which of them gives instruction how a weld repair should be inspected (visual, MPI, volumetric - UT / RT)?

PCC-2 "211-5.1.2 Nondestructive Examination AfterWelding" advises to do MPI as per construction code... (if construction code was asme VIII therefore the ASME UW-42 SURFACE WELD METAL BUILDUP recommends MPI as per its appendix 6).

Why I need NBIC here at all ?

Thank you so much

 

[DVWE]

so which of them gives instruction how a weld repair should be inspected (visual, MPI, volumetric - UT / RT)?

Both list NDE requirements.

Why I need NBIC here at all ?

NBIC needs to be followed if the vessel requires an “R” stamp.

The devil is in the details; she also wears prada.

 

[Christine74]

The reason(s) you may need to follow NBIC is if 1) it is a requirement of your jurisdictional authority, or 2) it is a requirement of the Owner/User.


-Christine

 

[r6155]

Be careful, in addition to the above mentioned, PWHT and also a pressure test may be required.
Contact the inspector.

Regards

 

[IdanPV]

What is the location of the installation?
Does the pressure vessel is registered with the National Board?

 

[r6155]

@ mariolucas75
I have a question.
Was there an inspector during the repair?
If so, does the inspector not know what type of inspection is required for the repair?
If no, do you believe that an inspector can approve a repair that he did not see?

Regards

 

[Louisiana Inspector]

It's a simple repair. As Christine74 mentioned above an R stamp is not required unless it's needed for the owner user or your jurisdictional. If not then you can do a 510 routine repair but an API 510 has to be involved with the repair planning and the final acceptance.

At a minimum, the prepped surface should have had PT performed before welding along with a visual. Depending on the thickness of the vessel you may have needed to do a preheat of 200°F. UTT should be performed to ensure nominal thickness was achieved after/during the repair and PT and visual of the completed repair.

Again an inspector should have been involved in the repair planning and during the repair. The inspection methods should have been determined before the repair even took place.


8.1.2 Authorization of Repair and Alteration
All repair and alteration work shall be authorized by the inspector before the work is started by a repair
organization. Authorization for alterations to any pressure vessels and for repairs to pressure vessels that comply
with ASME BPVC, Section VIII, Division 2 may not be initiated until an engineer has also authorized the work.
The inspector will designate the hold points required for repairs and alterations. The inspector may give prior
general authorization for limited or routine repairs on a specific vessel provided the inspector is satisfied with the
competency of the repair organization and the repairs are the kind that will not require a pressure test, e.g., weld
overlay of corrosion on a vessel that does not require postweld heat treatment (PWHT).

8.1.2.1 Before any repairs are performed, all proposed methods of design, execution, materials, welding
procedures, NDE, and testing shall be approved by the inspector or engineer. For alterations, major repairs, and
temporary repairs, approval by both the inspector and engineer is required. The inspector may establish hold
points to be implemented during the work execution.

8.1.2.2 The inspector shall approve all specified repair and alteration work at designated hold points and after
completion of the work in accordance with the repair plan.

 

[mariolucas75]

Dear All,

Thank you very much....