Select to compute pressure stresses in the shell and nozzle according to WRC 368. WRC 368 provides a method for calculating stresses in a cylinder-to-cylinder intersection (such as cylinder-to-nozzle) due to internal pressure and pressure thrust loading.
Using WRC 368 with WRC 107/297 is not accurate for calculating the combined stress
from pressure and external loads. So, this option is only available when the attachment
type is round and when no external loads are specified.