Guideline F-14

Yes, when the weldment can create a pressure hazard on the pressure bearing component.

Examples of welding operation for which qualification is required according to Annex I section 3.1.2 include:

1. Welding of a lifting lug on a pressure bearing chamber;
2. Welding of an attachment to a valve body;
3. Welding of reinforcing pads for nozzles;
4. Repair by welding on a chamber before placing on the market;
5. Major welding on a casting during production.

Examples of welding operations for which qualification is required according to Annex I section 3.1.2, unless the hazard analysis demonstrates that there is no pressure hazard, include:

1. Minor welding on a casting during production;
2. Buttering of a tubesheet;
3. Overlay welding on a pressure chamber (anticorrosive, wear coating…).