Can the ANSI/FCI 70.2 (IEC 60534-4) control valve seat leakage classes be applied to ball valves?  Well, OK, yes I know they can, but would a supplier/manufacturer supply/manufacture to such standards?  Is there a standard specific for ball valves?
"Bubble Tight" does not come with a procedure to quantify it. 
FCI 70.2 at least specified that you test on air or water at around 50 psi, and it strongly hints at how much leakage is allowed.  It has no correlation to how much leakage you are going to get at operating pressure, though in any class except for class V.  I think the Sierra club should pursue FCI for all the trees that have been killed in the printing of Class 1, which is absolutely and completely meaningless, exceeded in meaninglessness only by its uselessness. 
MSS-SP61 is probably more appropriate for shutoff valves as is API 6D. 

MORE NEWS