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Pipe Velocity Calculator Metric

Pipe Velocity Formula:

\[ v = \frac{Q}{\pi \times r^2} \]

m³/s
meters
m/s

1. What is a Pipe Velocity Calculator?

Definition: This calculator determines the velocity of fluid flowing through a pipe based on the flow rate and pipe radius.

Purpose: It helps engineers, plumbers, and technicians ensure proper flow characteristics in piping systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ v = \frac{Q}{\pi \times r^2} \]

Where:

  • \( v \) — Velocity (meters per second, m/s)
  • \( Q \) — Flow rate (cubic meters per second, m³/s)
  • \( r \) — Pipe radius (meters, m)
  • \( \pi \) — Pi (approximately 3.14159)

Explanation: The flow rate is divided by the pipe's cross-sectional area (πr²) to determine the average velocity.

3. Importance of Pipe Velocity Calculation

Details: Proper velocity calculation ensures efficient system operation, prevents erosion, and maintains laminar flow conditions.

4. Using the Calculator

Tips: Enter the flow rate in m³/s and pipe radius in meters. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical pipe velocity range?
A: For water systems, 0.5-3 m/s is common, with 1-2 m/s often considered optimal.

Q2: Can I use diameter instead of radius?
A: Yes, but you'll need to divide diameter by 2 before entering it as radius.

Q3: Does this account for pipe roughness?
A: No, this calculates theoretical average velocity. Friction losses require additional calculations.

Q4: How do I convert from liters/second to m³/s?
A: Divide liters/second by 1000 to get m³/s.

Q5: What if I have a rectangular duct instead of a pipe?
A: Use the formula v = Q/(width × height) for rectangular cross-sections.

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