Pipe Size Velocity Calculator

Velocity Formula:

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

Velocity (v):

m/s

1. What is a Pipe Size Velocity Calculator?

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

Purpose: It helps engineers and plumbers 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 3.1416)

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

3. Importance of Velocity Calculation

Details: Proper velocity calculation ensures efficient flow, prevents erosion, and maintains system pressure requirements.

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 velocity range for water in pipes?
A: For water, 0.5-2.5 m/s is common in plumbing systems, with 1-1.5 m/s often considered optimal.

Q2: How do I calculate flow rate if I know velocity?
A: Rearrange the formula: \( Q = v \times \pi \times r^2 \).

Q3: Does this work for any pipe shape?
A: This formula is for circular pipes. For other shapes, use the appropriate cross-sectional area.

Q4: What if I know diameter instead of radius?
A: Divide diameter by 2 to get radius before using the calculator.

Q5: How does viscosity affect the calculation?
A: This gives average velocity. Viscosity affects velocity profile but not the average value in this basic calculation.