dear All senior
when i weld coupling 1/2" 3000# to shell plate OD 2000 mmx 16 mm THK, which OD i should follow for choice welder qualification?could i find it in ASME VIII div 1? i only have welder with range qualification from 25 mm till U/L
it's possible when i run welder test with 1/2" sch XXS process GTAW+SMAW for cover this matter.

thanks n best regard

Hi there,

The OD limits are used for groove weld. Weld coupling to shell plate is a kind of fillet weld. Per QW-451.4, all the grove tests qualified all the fillet sizes. You needn't do anything as long as the welder has the qualification of the same process. Hope this helps

Tony

thanks alot sir