More of an answer to OP's question:
The analysis of a simple case of a nozzle is summarized below:
1) Use UG-40 to calculate the limits of reinforcement both in the parallel and outer normal directions(inner limits not supported by 1-7 last I checked).
2) Area available per UG-37 is...
I found this on Codeware's website:
Question:
How does COMPRESS determine which nozzles fall under the category of "large openings" subject to the rules of Appendix 1-7?
Answer:
For shells under 40" diameter, UG-36(b)(1) specifies that rules for reinforcing of nozzles per UG-36 through...
