Solved Examples
Estimate orifice diameter for flange tap type orifice flowmeter. Pipe diameter is 25 mm, Gas flowrate is 10 m3/h,
Pressure drop across orifice is 0.1 bar, Cp/Cv ratio is 1.4, Gas viscosity is 0.01 cP, Inlet Pressure is 1.2 bar, temperature is
40 °C and Gas Molecular weight is 29.
- Select Orifice Diameter from Solve for menu
- Input required data as stated above in Yellow Highlighted Cells.
- Calculator will provide following result.
Results
Orifice Dia. (D2)
6.985
mm
Reynold's No.
18910
Calculate flowrate through an Orifice for corner pressure tap type orifice flowmeter. Pipe diameter is 40 mm, Orifice diameter is
27 mm, Pressure drop is 50 Pa, Cp/Cv is 1.4, Gas Viscosity is 0.01 cP, Inlet Pressure is 1.2 Bar, Temperature is 313 °K, Gas
molecular weight is 29.
- Select Flowrate in Solve for menu.
- Input required data as stated above in Yellow Highlighted Cells.
- Calculator will provide following result.
Results
Flowrate
12.47
m3/h
Reynold's No.
14749