Dear All,
As you guys are aware how difficult it is for one to evaluate flange leakage from a stress analysis point of view. I have encountered numerous ideas and spoke to many people regarding this subject. Some brush of the idea of performing a flange leakage calc in this present day while some others suggest the infamous pressure equivalent method, low stress comparison method or the ASME VIII Div.1 Appendix 2 method. Some went even as far to propose nuclear codes.
In newer Caesar II version, COADE has included flange leakage calculations in them as well and I think it is more inclined towards the ASME VIII method.
I have also done my homework on ASME VIII and I feel that the calculations performed are based on the internal pressure and has nothing to do with external loadings from pipes.
To Mr. Abdel Halim Galala, I have read your post and you have some good insight to this. Could you kindly assist me with my queries as well?
You have written numerous threads on performing calculations for std, non std flanges and blind flanges.
My query is this. Is it safe to say that ASME VIII Div.1 Appdx 2 calc is to determine the flange stresses due to internal pressure and compare it with the allowables only. I dont think we can determine the thickness of the non standard flange with this calc as we should already know the thickness of the non standard flange in the first place. We are just comparing the flange stresses SH,SR,ST....
Second query is whether we can determine bending stresses from ASME VIII calculation and compare that with the stresses obtain from Caesar II for flange leakage? As you might already be aware Caesar II allows us obtain bending stresses/moments for flanges at the flange itself or just before the flange
Lastly, does anyone have any reference to ASME Codes to calculate bolt torque values? I have not done my homework on this...
Thank you for your thoughts...
Bending Stresses for Flanges
