Before I had access to such software, I would state the following: "Due to the inability to verify the SIFs at attachments on bends, I cannot recommend installing trunnions on bends. Industry leaders advise me that SIFs can range from anywhere to below 1 (noting that minimum SIF then becomes 1) to 10 and possibly even higher, depending on the geometry of the bend, trunnion, and weld, and calculating SIFs on such geometry are outside the scope of the piping to code to calculate. Because of this fact, CAESAR presently does not have the functionality to calculate such SIFs itself, and will be unlikely to until the piping code includes it."

As such, I gave them 4 options:
1. Buy the software.
2. Expect attachment on an elbow to be rerouted.
3. Accept liability for ignoring best recommended industry practice.
4. Pay someone else who has the software to do the work.

As a side note, there are plenty of other configurations and fittings that the piping code does not directly address, either, including laterals and Y-joints.