1. What is the Gas Flow Rate Formula?

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 for design and analysis purposes.

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 of pipe (ft²)
• \( 448.83 \) — Conversion factor (ft³/s to GPM)

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

3. Importance of Flow Rate Calculation

Details: Accurate flow rate estimation ensures proper system design, efficiency calculations, and equipment sizing.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: Why convert to GPM?
A: GPM is a common unit for comparing liquid and gas flows in many industrial applications.

Q2: How do I find the cross-sectional area?
A: For circular pipes: \( A = \pi \times (D/2)^2 \) where D is diameter in feet.

Q3: What's a typical gas velocity in pipes?
A: Typically 20-60 ft/s for gases, but depends on pressure and application.

Q4: Does this work for any gas?
A: Yes, but note this calculates volumetric flow, not mass flow.

Q5: What's the 448.83 conversion factor?
A: It converts cubic feet per second to gallons per minute (1 ft³/s = 448.83 GPM).