welder Qualification for stub-on/stub-in

By Ajirajnatarajan Date 04-19-2006 14:04

For welding stub-in nozzle on a vessel,what is the diameter for which the welder should be qualified?Is it the vessel dia. or the nozzle dia.?

By Shane Feder (****)

Date 04-19-2006 20:46

Nozzle diameter,
Regards,
Shane

By MBlaha

Date 04-20-2006 03:45

Would this be a full penetration weld? Do you have to backgouge and reweld the back side?? If so, would it not be the diameter of the vessel??

Just asking

Mike

By Shane Feder (****)

Date 04-20-2006 13:50

Mike,
The diameter of the vessel is totally irrelevant.
I presume we are talking ASME IX.
For a 2'' nozzle they would do a welder qual on any diameter less than 2 7/8'and that qualifies for 1'' and greater to unlimited diameter.
Test coupon on 2 7/8'and over qualifies for that diameter and greater.
Hope this helps,
Regards,
Shane