Hi,
In Caesar-II, we have option to define elbow type : 1. Single flange 2. Double flange. Question is do we must have to activate this option for elbow when it is with single flange or double flange? I mean do this added feature in C-II is due to B31.3 requirement?

As we have done so many projects earlier without using this option.

We have not used this option in our current project, but we got comment from Client to define elbow as single flange type or double flange type where it is applicable. Activating this option will affects flexibility and if it is connected to nozzle then nozzle load increases. At this stage of project it is difficult to ask equipment vendor to change allowable loads or change pipe routing to qualify nozzle loads

Please let me know your experience about this.
Thanks for your time..!!