Orifice Plate

Hello,

I'm new member in this forum ... I have a sevral quastions about which method

to use for design orifice plate.

I use a difference method wich i gain a difference answers.

the method i recently use are:

1. based on crane flow

2. based on Mink, Chem.

3. based on Dennis kirk

Please advise according to yours experience which is the right method i can use for

gain the right answer.

Thanks a lot,

David