1. What is a Friction Loss Calculator for Firefighting?

Definition: This calculator estimates the friction loss in a 2.5" fire hose based on the flow rate of water.

Purpose: It helps firefighters determine the pressure loss due to friction in fire hoses, which is critical for proper pump operation and nozzle performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( FL \) — Friction loss (psi per 100 feet of hose)
• \( Q \) — Flow rate (gallons per minute)

Explanation: This empirical formula accounts for the turbulent flow characteristics in fire hoses at typical firefighting flow rates.

3. Importance of Friction Loss Calculation

Details: Accurate friction loss calculations ensure proper nozzle pressure, adequate water flow, and effective fire suppression.

4. Using the Calculator

Tips: Enter the flow rate in gallons per minute (gpm). The value must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is friction loss important in firefighting?
A: Friction loss affects the pressure available at the nozzle, which directly impacts flow rate and firefighting effectiveness.

Q2: Does this formula work for other hose sizes?
A: No, this specific formula is for 2.5" hose. Different coefficients are used for other sizes.

Q3: How does length affect total friction loss?
A: Multiply the result by hose length (in hundreds of feet). For 300 ft, multiply by 3.

Q4: What's a typical flow rate for firefighting?
A: For 2.5" hose, common flow rates range from 100-300 gpm depending on the application.

Q5: Does elevation affect friction loss?
A: No, friction loss is independent of elevation, but elevation affects total pump pressure requirements.