here is the note 11 from B31.3 2012 edition

(11) The out-of-plane stress intensification factor (SIF) for a reducing branch connection with branch-to-run diameter ratio of 0.5 < d /D < 1.0 may be nonconservative. A smooth concave weld contour has been shown to reduce the SIF. Selection of the appropriate SIF is the designer’s responsibility.

This is a goo reminder to be aware of the limits of any analysis that we are performing.

At this time we still have this option for users to submit their CAESAR II models for translation using FEATools (using accurate bend SIF and flexibilities), along with a review, and comments by Paulin Research Group.

http://www.coade.com/caesarii/FEAModels.shtml

This is good way for user to some exposure to the converted model and get to compare the results before and after using the FEA generated SIFs and flexibilities.

For those who many not know what FEATools is:
FEATools (developed by PRG and sold by Intergraph) incorporates FEA generated bend SIF and flexibilities in to CAESAR II model automatically and generates a modified model. You can explore more about FEATools on our website (at this time the link is at http://www.coade.com/products/featools)