Hello,

I would like to know how Caesar calculate the stresses used for fatigue analysis for different piping components , for example in a B16.9 Tee.

I have read the applicable part in the technical reference manual and I understand that for most codes stress intensity is used. For a straight pipe I understand how the stress intensity is calculated. However how is a bend or a tee handled is there stress indices used to give an appropriate stress intensity at such components?

The stresses are computed as described in the Technical Reference Manual. A fitting (which is modeled as straight pipe) has an SIF associated with it, so this SIF is applied to the stresses (bending and/or torsion) as necessary.