Flow Rate Calculator (Crane Equation 3-20)

Note:

Crane Equation 3-20 calculates compressible fluid flow through valves, fittings and pipes. The equation accounts for expansion effects and determines if flow is sonic (choked) or subsonic.

Key Parameters That Affect Flow Rate:

Sonic Flow Determination:

Flow becomes sonic (choked) when ΔP/P₁ exceeds critical ratio:

KΔP/P₁Y
1.20.5520.588
1.50.5760.606
2.00.6120.622
30.6220.639
40.6970.649
60.7370.671
80.7620.685
100.7840.695
150.8180.702
200.8390.710
400.8830.710
1000.9260.710

Real-Life Applications:

Why Venting is Important?

Proper venting ensures safe pressure relief in piping systems, preventing equipment failure and hazardous conditions.

Industry Standards & Guidelines:

Based on ASME & Crane Technical Paper 410 standards for pressure loss calculations.

Conclusion:

Understanding flow rate calculations is crucial for optimizing safety and efficiency in fluid transport systems.