1. What is the GPM from PSI and Pipe Size Calculator?

Definition: This calculator estimates the flow rate in gallons per minute (GPM) through a pipe or nozzle based on pressure drop and pipe diameter.

Purpose: It helps engineers, plumbers, and technicians determine fluid flow rates in piping systems for design and troubleshooting.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q_{gpm} \) — Flow rate (gallons per minute)
• \( c \) — Flow coefficient (dimensionless, typically 0.9 for nozzles)
• \( d \) — Pipe diameter (inches)
• \( \Delta P \) — Pressure drop (psi)

Explanation: The formula relates flow rate to the square of pipe diameter and the square root of pressure drop, with a coefficient accounting for flow characteristics.

3. Importance of Flow Rate Calculation

Details: Accurate flow rate estimation ensures proper system design, pump sizing, and performance evaluation in hydraulic systems.

4. Using the Calculator

Tips: Enter the flow coefficient (default 0.9), pipe diameter in inches, and pressure drop in psi. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical flow coefficient (c) value?
A: For nozzles, c is typically 0.9-0.98. For pipes with fittings, it may range from 0.6-0.9 depending on smoothness.

Q2: Does this formula work for all fluids?
A: This formula is primarily for water. For other fluids, viscosity and density corrections are needed.

Q3: What's the maximum pipe size this works for?
A: The formula works best for typical pipe sizes (0.5" to 12" diameter) under normal flow conditions.

Q4: How does pressure affect flow rate?
A: Flow rate increases with the square root of pressure - doubling pressure increases flow by about 41%.

Q5: Can I use this for compressible fluids like air?
A: No, this formula is for incompressible fluids. Different equations are needed for gases.