Dear All,

As per my knowledge we are checking the stresses at Trunnion and Run pipe junction based on the Kellogs formulae.
It is
S=(1.17*(R^0.5)(F1+1.5F2)/(t^1.5)
where F1= Unit loading due to longitudinl Bending moment(M/∏R^2)
F2= Unit loading due to radial thrust(W/2∏R)

Please tell me that is there any change in the values of F1 and F2 when trunnion is attached for an elbow.