1. What is a Pipe Fitting Pressure Loss Calculator?

Definition: This calculator estimates the pressure loss (ΔP) across pipe fittings using the loss coefficient (K), fluid density (ρ), and flow velocity (V).

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

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \Delta P \) — Pressure loss (Pascals)
• \( K \) — Loss coefficient (dimensionless)
• \( \rho \) — Fluid density (kg/m³)
• \( V \) — Flow velocity (m/s)

Explanation: The pressure loss is proportional to the square of the velocity and depends on the fitting's resistance characteristics (K factor).

3. Importance of Pressure Loss Calculation

Details: Accurate pressure loss estimation ensures proper system performance, prevents flow issues, and helps select appropriately sized pumps.

4. Using the Calculator

Tips: Enter the fitting's K factor, fluid density (default 1000 kg/m³ for water), and flow velocity. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Where do I find K factors for fittings?
A: K factors are typically provided in engineering references or by fitting manufacturers. Common values range from 0.2 for long-radius elbows to 10 for check valves.

Q2: What's a typical fluid density for water?
A: Water at 20°C has a density of about 998 kg/m³, often rounded to 1000 kg/m³ for calculations.

Q3: How does velocity affect pressure loss?
A: Pressure loss increases with the square of velocity - doubling velocity quadruples the pressure loss.

Q4: Can I use this for gases?
A: Yes, but use the correct gas density and ensure velocities are within typical ranges for the application.

Q5: How do I convert the result to other units?
A: 1 Pa = 0.000145 psi or 0.0000102 kg/cm². For kPa, divide Pa by 1000.