orifice plate sizing

[cams1975]

Hi
Sorry if this has been covered before, but can someone advise if there is a formaula i can use to claculate the required size of an orifice plate.

Thanks

 

[Artisi]

Have alook at this site

http://www.efunda.com/formulae/fluids/calc_orifice_flowmeter.cfm

 

[dcasto]

if you need custody transfer you'll need to get API chapter 14 or ISO 5167.