1. What is Gas Flow Rate Calculation?

Definition: This calculator estimates the volumetric flow rate of gas in gallons per minute (GPM equivalent) based on velocity and cross-sectional area.

Purpose: It helps engineers and technicians determine gas flow rates in piping systems and ventilation applications.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Volumetric flow rate (GPM)
• \( V \) — Velocity of gas (ft/s)
• \( A \) — Cross-sectional area (ft²)
• \( 448.83 \) — Conversion factor (ft³/s to GPM)

Explanation: The velocity is multiplied by area to get flow in ft³/s, then converted to GPM.

3. Importance of Gas Flow Rate Calculation

Details: Accurate flow rate calculations ensure proper system design, efficient operation, and safety in gas handling systems.

4. Using the Calculator

Tips: Enter the gas velocity in feet per second and the cross-sectional area in square feet. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is the conversion factor 448.83?
A: This converts cubic feet per second to gallons per minute (1 ft³/s = 448.83 GPM).

Q2: What's a typical gas velocity in pipes?
A: For natural gas, typical velocities range from 15-40 ft/s depending on pressure and application.

Q3: How do I calculate cross-sectional area?
A: For circular pipes: \( A = \pi \times r^2 \) where r is the radius in feet.

Q4: Does this work for liquids too?
A: Yes, the same formula applies to liquid flow rate calculations.

Q5: What if my area is in square inches?
A: Convert to square feet first (1 ft² = 144 in²) before using the calculator.