Do not be concerned for my sake... His comment speaks eloquently on his own up bringing, and cultural value(s). I still think he would have greater success getting his nebulous question answered in those other forums but if he wants to fish in a lake that has few fish in it so be it.
The question is nebulous because different companies have different standards on V as well as Industry practice. The question reminds me of "What is the best (Tea,Coffee, Bier.... etc.)" Or athe evr popular what coefficient should Mu be?
We all know as V goes up the possibility of flow induced vibration increases , but there is no single magic number that fits all occasions, only a person lacking knowledge on the subject would ask what is the single magic number?
I hope he finds success in his quest for the magic number, perhaps he will also come across the lost ark of the covenant, the holy grail or the magic touchstone that converts lead to gold!
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Best Regards,
John C. Luf