Richard-San & Dave-San,

http://www.paulin.com/Downloads.html

From the above link I downloaded one document regarding how to use SIF values from FE to CAESAR-II.

Can you please go through the notes 4 in the attachment: It states that "Input values of ii and io override the effective section modulus calculation. stresses even at intersection are calculated using iM/Z when the SIF is entered. IS IT TRUE??

B31.1 & B31.3 have different approaches to reduced outlet tees. B31.1 adjusted the SIF while B31.3 adjusted the section modulus used for those branches. I guess you could say that Tony Paulin's work follows the B31.1 approach, it is consistent with stress adjustment through SIF alone.
If you use the newer SIFs 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.

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.

You must determine if your new SIF should be used with the B31.3 Ze or not used with the B31.3 Ze. I can only guess that your new FEA calculation for the branch SIF on a reduced outlet intersection would be used with Z rather than Ze. For B31.3, CAESAR II will use Ze for the branch stress calculation on reduced intersections. In CAESAR II, for B31.3, you control the use of Z or Ze for the branch by the tee designation. Identify the tee to use Ze, do not call out the tee to use Z.
Try it.

Dave-San,

From your previous posts "Do not identify the type of branch in CAESAR II (e.g., UFT) as that will have the program calculate an effective section modulus (Ze) in B31.3. Your FEA SIFs reflect the intent of the Ze so Ze should not be used in CAESAR-II. Confirm the proper use of in- and out-of-plane SIFs."

I think from this statement what I understand is : If u take SIF values from FE => its already consider the effect of Ze" SO no need to consider the Ze again in stress calculations.

From your latest post "I can only guess that your new FEA calculation for the branch SIF on a reduced outlet intersection would be used with Z rather than Ze " IS it true I think from above statement FEA calcularions use Ze not Z"

Thanks for your explanation, please correct me if I am wrong.

I do not know why someone who uses FEA to calculate a "more rigorous" SIF would consider a second adjustment so that a Ze could be used.
Tony Paulin's work on the ASME project ST-LLC 07-02 was to align SIF for consistent use by all Code books. The SIFs he proposes are intended to be used with Z and not the Ze currently found in B31.3 branches of reduced outlet tees.
I do not believe I have anything further to add here.

Thanks Dave-San,

Its clear.