PV Elite (nozzle joint efficiency)

[Champ58]

I am using PV Elite 2017 with code reference ASME Sec VIII, Div-1 for Pressure Vessel Design.
now i have a issue with nozzle joint efficiency. I need to know how the system acquires nozzle joint efficiency, or the input tabs for it.
I have input longitudinal and circumferential seam efficiencies as 0.85 for all shells and selected RT-3 in the design section, but i am not aware of the nozzle joint efficiency that the system acquiring.

Do I need to input additional data for nozzle joint efficiency or it will work on itself after i select 0.85 long and 0.85 circ seam efficiency for elements (shell and heads) and select RT-3 in design panel?

 

[CuMo]

It should comply with the rules in ASME VIII-1 for joint efficiencies.
Have you checked the logic in the code in accordance with your specific design?

 

[Champ58]

Thank you CuMo, but i am still not clear about my question...

I went through the code book of ASME VIII-1 with many paragraphs/codes regarding this issue but still not satisfied with explanations there and i particularly want to know how should we handle nozzle joint efficiency (flange to neck joint) while designing that nozzle. I did not find any use of nozzle joint efficiency in nozzle calculations except (nozzle efficiency and shell efficiency, both i think will be 1 for my case as i am using seamless neck and there is no seam clash, refereed UG-37 and UG-27).

So, what should i do if i want to design my whole vessel with RT-3 and i am not getting any input sections for nozzle joint efficiency. I have selected Spot radiography per UW-11(b)type-1 for all heads and shells so i would like to do the same with nozzle joint efficiency.

 

[IdanPV]

Refer to Table UW-12 for Type No. (7), as stated by the table, the limitations are per Figure UW-16.1 and there is no joint efficiency for this kind of joint.
However, UW-15 provide few other rules for the design of welded connection and nozzle attachment.
P.S
there are some code interpretations regarding this issue.

 

[david339933]

Nozzles are exempt from RT if they are 10" NPS or less and less than 1.125" WT.