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Bolt stresses are not used in the calculaton of Wm1 and Wm2. Bolt allowable stress is used in the calculation of W for gasket seating. If you use the higher stresses you are suggesting, then the required bolt area, Am, will be incorrect and smaller than if calculated using the allowable from...

08tramp, Appendix S is a discussion on preloading flange bolting after the flange has been designed. The allowable stress for bolts to be used in the design of Appendix 2 flanges is as defined in Appendix 2; the appropriate maximum allowable stress from Section II, Part D, Table 3. In...

BigTank, Suggest you design the flange as 'ring type integral', not 'ring type loose'. If you try 'ring type loose' you will have a problem defining the flange ID in COMPRESS since it will be smaller than the shell OD. For 'ring type integral' the design calculations are the same as Fig. 2-4...

Simdro, If the external loads are resisted by the body flanges, usually they are, then they must be considered as they are UG-22 loadings. Currently, Section VIII-1 does not provide a method to consider the loads, an equivalent pressure method or some other method is acceptable (see U-2(g)) as...

Ganfoss2, Currently UHX does not have any rules that limit the size or location of a nozzle in an integral shell or channel relative to the tubesheet. We (SG-HTE) have an open item to investigate this issue but at this time we do not have a proposal for consideration. When a shell or channel...

The design of the flange is no different if it is tongue and groove or raised face except for the dimensioning of the tongue and groove. Appendix 2 and COMPRESS do not consider the raised face or groove in the calculation of the flange thickness 't'. When setting up the design, you must select...