Gas Orifice Flow Meter Calculator
This application calculates the flowrate through a large-diameter orifice using the approach outlined in ISO 5167 2:2003
Orifice meters use the pressure loss across a constriction (that is, the orifice plate) in a pipe to determine the flowrate.
The formulas are valid for
pipes diameters between 50mm and 1000 mm,
and pressure ratios greater than 0.75.
Reference: http://en.wikipedia.org/wiki/Orifice_plate
Pipe Diameter D1 (m)
Molecular Weight
Orifice Diameter D2 (m)
Compressibility Factor
Upstream Pressure P1 (Pa)
Specific Heat Ratio
Downstream Pressure P2 (Pa)
Fluid Viscosity (Pa s)
Upstream Temperature (K)
Tap Type
Corner TapsD-D2/2 TapsFlange Taps
0.016584 m3 s-1
Legal Notice: © Maplesoft, a division of Waterloo Maple Inc. 2015. Maplesoft and Maple are trademarks of Waterloo Maple Inc. Neither Maplesoft nor the authors are responsible for any errors contained within and are not liable for any damages resulting from the use of this material. This application is intended for non-commercial, non-profit use only. Contact the authors for permission if you wish to use this application in for-profit activities.
