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...
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...