Orifice Flow Conditions

[MatthewD]

I am curently designing a orifice plate that is attached to the discharge of a pressurized vessel. Since this is a transient system I am not sure at what point during the depressurization I should use for the designing of the orifice. Any advice would be appreciated.

 

[MatthewD]

Jay165 I find the idea of a choke nipple appealing. I wish I could provide a flowsheet but I have to be careful about confidentiality btw my company and our clients. Everyone has been very helpful and my thanks to everyone in this regard