Pipe Pressure Loss Calculator

Pressure Loss Formula:

\[ \Delta P = f \times \left( \frac{L}{D} \right) \times \left( \frac{\rho \times V^2}{2} \right) \]

Friction Factor (f):

Pipe Length (L):

Pipe Diameter (D):

Fluid Density (ρ):

kg/m³

Fluid Velocity (V):

m/s

Pressure Loss (ΔP):

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1. What is a Pipe Pressure Loss Calculator?

Definition: This calculator estimates the pressure loss in a pipe system due to friction using the Darcy-Weisbach equation.

Purpose: It helps engineers and designers determine the pressure drop in piping systems for proper pump selection and system design.

2. How Does the Calculator Work?

The calculator uses the Darcy-Weisbach equation:

\[ \Delta P = f \times \left( \frac{L}{D} \right) \times \left( \frac{\rho \times V^2}{2} \right) \]

Where:

\( \Delta P \) — Pressure loss (Pascals)
\( f \) — Darcy friction factor (dimensionless)
\( L \) — Pipe length (meters)
\( D \) — Pipe diameter (meters)
\( \rho \) — Fluid density (kg/m³)
\( V \) — Fluid velocity (m/s)

Explanation: The equation calculates the energy loss due to friction between the fluid and the pipe walls.

3. Importance of Pressure Loss Calculation

Details: Accurate pressure loss calculations ensure proper pump sizing, energy efficiency, and system performance in piping systems.

4. Using the Calculator

Tips: Enter the friction factor (default 0.02 for turbulent flow in smooth pipes), pipe dimensions, fluid properties, and velocity. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: How do I determine the friction factor?
A: For laminar flow (Re < 2000), f = 64/Re. For turbulent flow, use Moody chart or Colebrook equation based on pipe roughness.

Q2: What's a typical fluid density?
A: Water at 20°C is about 1000 kg/m³. For other fluids, consult property tables.

Q3: What velocity range is typical in pipes?
A: For water, 1-3 m/s is common in supply lines, but depends on application and pipe size.

Q4: How does pipe material affect results?
A: Material affects roughness which impacts friction factor. Rougher pipes have higher pressure loss.

Q5: Can I use this for gases?
A: Yes, but for compressible gases with significant pressure drop, more complex calculations are needed.