1. What is Gas Flow Rate Measurement?

Definition: This calculator measures the equivalent liquid flow rate (in GPM) of gas based on its velocity and cross-sectional area.

Purpose: It helps engineers and technicians convert gas flow measurements to more familiar liquid flow units for comparison and system design.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Flow rate (gallons per minute)
• \( V \) — Velocity of gas (feet per second)
• \( A \) — Cross-sectional area (square feet)
• \( 448.83 \) — Conversion factor (ft³/s to GPM)

Explanation: The velocity and area product gives volumetric flow in ft³/s, which is then converted to GPM.

3. Importance of Gas Flow Rate Measurement

Details: Accurate flow measurement is critical for system design, process control, and equipment sizing in piping systems.

4. Using the Calculator

Tips: Enter the gas velocity in ft/s and the pipe cross-sectional area in ft². All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why convert gas flow to GPM?
A: GPM is a more familiar unit for many engineers, allowing comparison with liquid systems.

Q2: How do I measure gas velocity?
A: Use anemometers, pitot tubes, or calculate from pressure differential and known parameters.

Q3: What affects the conversion factor?
A: The factor 448.83 assumes standard conditions; it may vary with temperature and pressure.

Q4: Can this be used for any gas?
A: Yes, but note the result is volumetric equivalent, not accounting for gas density differences.

Q5: How accurate is this calculation?
A: It provides theoretical values; actual flow may vary due to friction, turbulence, and other factors.