Measurements & Automation for Android
ru
Windows ⁄ Android

Orifice Plate - Liquid

  Example Of Water Flowrate
  Flowrate - Mass
  Calculation of the flowrate [q] for a given differential pressure [Δp].
1. Input values
Calculated valuesSymbolUnitValue
Device diameter at 20 °Cd20mm120,000
Pipe diameter at 20 °D20mm200,000
Device materialsteel AISI 321, S32100
Pipe materialsteel 1030, 1034, 1035, 1038
Arithmetical mean deviation of the roughness profile (Steel encrusted)Ramm0,4000
Uniform equivalent roughnessRkmm1,2500
TappingCorner
Operating temperaturet°С75,00
Atmospheric pressurepakPa100,00
Upstream pressurepukPa1900,00
Differential pressureΔpkPa49,00
Operating conditions
Dynamic viscosityμμPa·s378,2349
Density, operating conditionsρkg/m³975,6960

2. Calculation of intermediate values
Calculated valuesSymbolUnitValue
Absolute pressurepkPa2000,00
Thermodynamic temperatureT°K348,15
The temperature coefficient of change in the diameter of the device, caused by temperature deviations from 20 °CKd-1,000000
Device diameter at operating temperaturedmm120,0000
The temperature coefficient of change in the diameter of the pipe, caused by temperature deviations from 20 °CKp-1,000000
Pipe diameter at operating temperatureDmm200,0000
Diameter ratioβ-0,600000
Input rate factorE-1,07187
Expansibility factorε-1,00000

3. Final calculations
Calculated valuesSymbolUnitValue
1-st approximation
Reynolds numberRe-1000000
Discharge coefficientC-0,605407
The roughness coefficient of the internal surface of the pipeKr-1,01457
Mass flowrateqmkg/s72,81035
2-nd approximation
Reynolds numberRe-1225495
Discharge coefficientC-0,605167
The roughness coefficient of the internal surface of the pipeKr-1,01483
Mass flowrateqmkg/s72,80014
DeviationΔ%0,0001403
3-d approximation
Reynolds numberRe-1225323
Discharge coefficientC-0,605167
The roughness coefficient of the internal surface of the pipeKr-1,01483
Mass flowrateqmkg/s72,80015
DeviationΔ%0,0000001