Hello,
I have the a Full Coupling 2.5" #3000 threaded, welded into a 4" NPS SCH. XXS Elbow right in the neck.
Please see the attached sketch.
This is an ASME U vessel, is this legal according to ASME VIII DIV. 1? I want to apply the configuration of Figure UW-16.2 (L), but I don't know what...