Gas Orifice Flow Meter Calculator
This application calculates the flow rate 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 flow rate.
The formulas are valid for the following parameters:
Pipe diameters between 50mm and 1000 mm
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
m3 s-1
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