I am assessing the risk of a partially engaged plug on a ball valve. The minimum thread engagement specified in ASME B1.20.1 seems to be based on full strength of the fitting without considering actual forces acting over it.
In general plugs on valve body will be subjected to internal pressure...
Mike, "Hg is always Hp" and "it is the compression load remaining on the gasket..." are contradicting each other. Hg can't always be Hp if it is the remaining compression load, it is against simple statics, sum of forces equal to zero. If the gasket seating load is W=Ab*Sa, then during...
Mike, Thank you...
Yes, Appendix 2 gives option to select higher bolt load and clearly recommends flange design accordingly...
My clarification is that If I select bolt load equal to Ab*Sa or more than this, what would be the Hg value for operating condition??
To my knowledge Hg is the...
TGS, Thank you vey much for your response. I am aware of the Appendix S & PCC-1 loads. PCC-1 provides step by step procedure for calculating bolt load based on the gasket, bolt and flange rotation and finally suggesting checking of flange stresses either by elastic closed-form analysis or FE...
ASME Sec VIII Div 1 App 2 calls for stress verification for operating condition bolt load being Wm1 and for seating condition bolt load being Wg, recommended bolt load in place of Wm2. As per the code Wm1 & Wm2 are the minimum required bolt load for operating and seating condition. So we can...
