I've had a look at the CAESAR trunnion module, but hit a problem right from the start. It limits the D/t ratio to between 20 and 60 and the first trunnion I looked at was 4" SCH80 [D/t=13.35!!] B*mmer!
Since I have had no joy [yet] in obtaining a copy of Hankinson et al's paper, can anybody [not-withstanding the stated limits of the Hankinson method] offer some advice on calculating suitable SIFs to use for a bend / trunnion intersection, or offer some sage advice on modifying the Kellogg method for use on elbows.