Dave-San,
Please find my doubts in red color,
If you use the newer SIFs ( Means from other sources like FE not from code ASME B31.3) in B31.3 in CAESAR II and the SIF addresses the higher effective stress in the branch of reduced outlet tees, do not call the intersection a tee, since CAESAR II will then apply Zeffective"(If user do not specify tee type then Z exact is used) if Zexact is used still stress in the branch is increased. can you please clarify your statement what you written its bit confusing..
please correct me If I am wrong.
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Thanks,
Durga