Pipe Flow Loss Calculator

Flow Loss Formula:

\[ \Delta P = \frac{f \cdot L \cdot \rho \cdot v^2}{2 \cdot D} \]

Friction Factor (f):

dimensionless

Pipe Length (L):

meters

Fluid Density (ρ):

kg/m³

Flow Velocity (v):

m/s

Pipe Diameter (D):

meters

Pressure Loss (ΔP): Pa

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1. What is a Pipe Flow Loss Calculator?

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

Purpose: It helps engineers and fluid system designers determine the energy loss in piping systems for proper pump sizing and system design.

2. How Does the Calculator Work?

The calculator uses the Darcy-Weisbach equation:

\[ \Delta P = \frac{f \cdot L \cdot \rho \cdot v^2}{2 \cdot D} \]

Where:

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

Explanation: The equation calculates the pressure drop due to friction between the fluid and the pipe walls.

3. Importance of Flow Loss Calculation

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

4. Using the Calculator

Tips: Enter the friction factor (default 0.02 for turbulent flow), pipe length, fluid density (default 1000 kg/m³ for water), flow velocity, and pipe diameter. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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

Q2: What's a typical density for water?
A: Water at 20°C has a density of about 1000 kg/m³. For other fluids, consult material properties.

Q3: Does this include minor losses?
A: No, this calculates only major (friction) losses. Minor losses from fittings require separate calculation.

Q4: What units should I use?
A: Use consistent SI units (meters, kg/m³, m/s) for accurate results in Pascals.

Q5: How does pipe roughness affect results?
A: Pipe roughness influences the friction factor. Smoother pipes generally have lower friction factors.