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GPM to Velocity in Pipe Calculator

Velocity Formula:

\[ v = \frac{Q \times 0.0000631}{\pi \times (\frac{d}{2})^2} \]

gpm
meters
m/s

1. What is GPM to Velocity in Pipe Calculator?

Definition: This calculator converts flow rate in gallons per minute (GPM) to fluid velocity in a pipe in meters per second (m/s).

Purpose: It helps engineers, plumbers, and fluid system designers determine the speed of fluid flow in pipes.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ v = \frac{Q \times 0.0000631}{\pi \times (\frac{d}{2})^2} \]

Where:

  • \( v \) — Velocity (meters per second)
  • \( Q \) — Flow rate (gallons per minute)
  • \( d \) — Pipe diameter (meters)
  • 0.0000631 — Conversion factor (m³/s per gpm)

Explanation: The flow rate is converted to cubic meters per second, then divided by the pipe's cross-sectional area.

3. Importance of Velocity Calculation

Details: Proper velocity calculation ensures efficient system design, prevents pipe erosion, and maintains optimal flow conditions.

4. Using the Calculator

Tips: Enter the flow rate in GPM and pipe diameter in meters. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical velocity range for water in pipes?
A: For water, 0.5-2.5 m/s is common, with 1-1.5 m/s often considered optimal.

Q2: How do I convert pipe diameter from inches to meters?
A: Multiply inches by 0.0254 to get meters (1 inch = 0.0254 meters).

Q3: Why is velocity important in pipe systems?
A: High velocity can cause erosion and noise; low velocity may lead to sedimentation.

Q4: Does this work for any fluid?
A: Yes, but the formula assumes the fluid fills the pipe completely.

Q5: What's the 0.0000631 conversion factor?
A: It converts gpm to m³/s (1 gpm = 0.00006309 m³/s).

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