Pressure Drop Through Hose Calculator

Pressure Drop Formula:

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

Friction Factor (f):

Hose Length (L):

Hose Diameter (D):

Fluid Density (ρ):

kg/m³

Fluid Velocity (V):

m/s

Pressure Drop (ΔP):

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1. What is a Pressure Drop Through Hose Calculator?

Definition: This calculator estimates the pressure loss due to friction as fluid flows through a hose or pipe.

Purpose: It helps engineers and technicians determine the pressure loss in fluid systems to ensure proper system design and operation.

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 drop (Pascals)
\( f \) — Friction factor (dimensionless)
\( L \) — Length of hose/pipe (meters)
\( D \) — Diameter of hose/pipe (meters)
\( \rho \) — Fluid density (kg/m³)
\( V \) — Fluid velocity (m/s)

Explanation: The equation calculates pressure loss due to friction based on pipe characteristics and fluid properties.

3. Importance of Pressure Drop Calculation

Details: Accurate pressure drop calculations are essential for proper pump selection, system efficiency, and ensuring adequate pressure at delivery points.

4. Using the Calculator

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

5. Frequently Asked Questions (FAQ)

Q1: How do I determine the friction factor?
A: The friction factor depends on the Reynolds number and pipe roughness. For turbulent flow in smooth pipes, 0.02 is a typical starting value.

Q2: What's a typical fluid density?
A: Water at 20°C is about 1000 kg/m³. Oils range 800-900 kg/m³, while air is about 1.2 kg/m³ at standard conditions.

Q3: How does diameter affect pressure drop?
A: Pressure drop is inversely proportional to diameter - smaller diameters cause significantly higher pressure losses.

Q4: What velocity is considered reasonable?
A: For water systems, 1-3 m/s is typical. Higher velocities increase pressure drop and may cause erosion.

Q5: Can this be used for gases?
A: Yes, but for compressible gases with significant pressure drops, more complex calculations are needed.