Just a reminder, B31.3 does not apply an SIF to reducers the way B31.1 does.

I would also like to get some clarification on the "tapered transition" fitting type. I've seen other people use it in a file to model the two ends of a reducer, but I don't know what the basis for that is and there's no mention that I can find in the manuals as to what it is supposed to mean. I was admittedly disturbed to see it generate an SIF value at all in a B31.3 model, if it is intended to represent a reducer.