Advanced tools for flow measurement and analysis
Enter parameters to calculate flow rates
Configure discharge coefficient calculation
Review ISO 5167 compliance requirements
This calculator implements the ISO 5167 standard for orifice plate flow measurement. Key requirements include:
Volumetric Flow Rate
-
m³/s
Mass Flow Rate
-
kg/s
Discharge Coefficient
-
Cd
Beta Ratio (β)
-
d/D
Reynolds Number
-
Dimensionless
Velocity in Orifice
-
m/s
ISO 5167 Compliance
-
Status
| Parameter | Value | Ideal Range |
|---|---|---|
| Beta Ratio | - | 0.2 - 0.75 |
| Reynolds Number | - | > 10,000 |
| Pressure Recovery | - | 40-60% of ΔP |
The basic orifice meter equation calculates flow rate (Q) as:
Where Q is flow rate (m³/s), Cd is the discharge coefficient, Ao is the orifice area (m²), ΔP is pressure drop (Pa), and ρ is fluid density (kg/m³).
The discharge coefficient (Cd) accounts for:
It depends on beta ratio (β = d/D), Reynolds number, and orifice plate edge sharpness.
Choosing the right orifice plate for your application
Special considerations for complex fluids
Common flow problems and solutions