1. What is a Linear Flow Rate Calculator?

Definition: This calculator determines the linear flow rate (velocity) of fluid in a pipe based on volumetric flow rate and pipe cross-sectional area.

Purpose: It helps engineers and technicians calculate how fast fluid is moving through a pipe system.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( V \) — Linear flow rate (feet per second)
• \( Q \) — Volumetric flow rate (gallons per minute)
• \( A \) — Pipe cross-sectional area (square feet)
• 448.83 — Conversion factor (GPM to ft³/s)

Explanation: The formula converts volumetric flow to linear velocity by accounting for pipe size and unit conversions.

3. Importance of Linear Flow Rate Calculation

Details: Knowing flow velocity helps in system design, ensuring proper flow characteristics and avoiding issues like erosion or sedimentation.

4. Using the Calculator

Tips: Enter the volumetric flow rate in GPM and pipe area in square feet. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow velocity in pipes?
A: For water systems, 2-5 ft/s is common, with 4-6 ft/s for short runs and 1-3 ft/s for gravity systems.

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

Q3: Why 448.83 in the formula?
A: This converts GPM to ft³/s (1 GPM = 0.002228 ft³/s) and adjusts the equation for velocity calculation.

Q4: Can I use this for gases?
A: This calculator is designed for liquids. Gas calculations require additional factors for compressibility.

Q5: What if I know diameter instead of area?
A: Use our Pipe Area Calculator first to convert diameter to cross-sectional area.