1. What is a Pipe Size from Pressure and Flow Calculator?

Definition: This calculator determines the required pipe diameter based on fluid viscosity, pipe length, flow rate, and pressure drop.

Purpose: It helps engineers 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)
• \( \mu \) — Dynamic viscosity (Pa·s)
• \( L \) — Pipe length (meters)
• \( Q \) — Volumetric flow rate (m³/s)
• \( \Delta P \) — Pressure drop (Pascals)

Explanation: The formula calculates the minimum pipe diameter needed to achieve a specified flow rate with a given pressure drop.

3. Importance of Pipe Sizing

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

4. Using the Calculator

Tips: Enter viscosity (default 0.001 Pa·s for water), pipe length, flow rate, and desired pressure drop. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What viscosity value should I use for water?
A: Water at 20°C has a viscosity of about 0.001 Pa·s (1 centipoise).

Q2: How does pipe length affect the calculation?
A: Longer pipes require larger diameters to maintain the same pressure drop for a given flow rate.

Q3: What's a typical pressure drop for water systems?
A: Common design values range from 100-500 Pa/m (0.01-0.05 bar/m) depending on application.

Q4: Does this account for turbulent flow?
A: This formula assumes laminar flow. For turbulent flow, additional factors like roughness are needed.

Q5: Can I use this for gases?
A: This is primarily for liquids. Gas calculations require compressibility factors.