Pipe Size vs Flow Rate Calculator

Pipe Diameter Formula:

\[ D = \sqrt{\frac{4 \times Q}{\pi \times V}} \]

Pipe Diameter (D):

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

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:

\[ D = \sqrt{\frac{4 \times Q}{\pi \times V}} \]

Where:

\( D \) — Pipe diameter (meters)
\( Q \) — Volumetric flow rate (cubic meters/second)
\( V \) — Flow velocity (meters/second)
\( \pi \) — Pi, approximately 3.1416

Explanation: The formula calculates the minimum pipe diameter needed to maintain a specified flow velocity for a given flow rate.

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 (typical range 0.5-3 m/s for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical flow velocity for water pipes?
A: For water, common velocities are 0.5-1.5 m/s for gravity systems and 1-3 m/s for pumped systems.

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 mm or inches?
A: Multiply meters by 1000 for mm or by 39.37 for inches.

Q4: Does this work for gases as well as liquids?
A: Yes, but gas systems typically use higher velocities (10-30 m/s) due to lower density.

Q5: Should I round up the calculated diameter?
A: Yes, always select the next available standard pipe size larger than the calculated diameter.