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AMSE Appendix 2

AMSE Appendix 2

AMSE Appendix 2

(OP)
Does anyone have any insight into the logic for the flange stress limits and stud sizing in Appendix2 of the ASME code?  If you look at a standard TEMA flange in the 1000 # range, the stress limit for the flange, Sh, seems to correspond with a little more than 25% of yield for the studs.  Is that typical?

RE: AMSE Appendix 2

Can you be more specific on what you are wandering about?
The limit for SH is 1.5Sf (in most common situations) and this can be close to but never higher than yield stress for flange material. Bolt material is a different matter, why should you compare its yield stress to that of flange material?
The rationale behind App.2 is that membrane stresses (SR, ST and bolt stress) are limited by the allowable stress in tension, and membrane+bending stresses (SH) are limited by 1.5 times the allowable stress in tension.


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