1. What is a Pipe Size Calculator by Flow Rate?

Definition: This calculator determines the required pipe diameter based on the flow rate and desired flow velocity.

Purpose: It helps engineers, plumbers, and designers select appropriate pipe sizes for fluid transport systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( D \) — Pipe diameter (meters)
• \( Q \) — Flow rate (cubic meters per second)
• \( V \) — Flow velocity (meters per second)
• \( \pi \) — Pi (approximately 3.1416)

Explanation: The formula calculates the minimum pipe diameter needed to achieve a desired flow rate at a specified velocity.

3. Importance of Pipe Sizing

Details: Proper pipe sizing ensures efficient fluid transport, prevents excessive pressure drops, and minimizes energy costs.

4. Using the Calculator

Tips: Enter the flow rate in m³/s and desired velocity in m/s (default 1.0 m/s for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow velocity for water?
A: For water, 1-2 m/s is common in plumbing systems, while 2-3 m/s is typical for industrial applications.

Q2: How do I convert flow rate from L/s to m³/s?
A: Divide liters per second by 1000 (1 L/s = 0.001 m³/s).

Q3: What if I need the diameter in inches or mm?
A: Multiply meters by 39.37 for inches or by 1000 for millimeters.

Q4: Does this account for friction losses?
A: No, this calculates theoretical diameter. For precise sizing, consider friction losses using the Darcy-Weisbach equation.

Q5: What velocity is too high?
A: Generally, velocities above 3 m/s may cause erosion, noise, and excessive pressure drops in water systems.