Dear RUs

I found en error in final stress calculation on your spread sheet.

there are primary stress indices B1, B2.
It is right 0.5 and 1.0 each of factor only for straight pipe.
But in case of Elbow Mounted trunnion you can not use that value. you shoud calculate B1, B2 specially according to the FIG.NC-3763.2(b)

Confirm it again.