1. What is GPM to Pressure Conversion?

Definition: This calculator converts flow rate in gallons per minute (GPM) to pressure in pounds per square inch (psi) using fluid velocity and pipe area.

Purpose: It helps engineers and technicians determine the pressure generated by fluid flow in pipes.

2. How Does the Calculator Work?

The calculator uses two formulas:

Where:

• \( P \) — Pressure (psi)
• \( V \) — Velocity (ft/s)
• \( \rho \) — Fluid density (lb/ft³)
• \( Q \) — Flow rate (GPM)
• \( A \) — Pipe cross-sectional area (ft²)

Explanation: First calculates velocity from flow rate, then uses velocity to determine dynamic pressure.

3. Importance of Flow to Pressure Conversion

Details: Understanding this relationship is crucial for designing piping systems, selecting pumps, and ensuring proper system operation.

4. Using the Calculator

Tips: Enter flow rate in GPM, pipe area in square feet, and fluid density (default 62.4 lb/ft³ for water). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's the 448.83 conversion factor?
A: This converts GPM to ft³/s (1 GPM = 0.002228 ft³/s) and accounts for unit consistency in the equation.

Q2: Why is density important?
A: Heavier fluids create more pressure at the same velocity. Water at 62.4 lb/ft³ is the common reference.

Q3: Does this account for pipe friction?
A: No, this calculates dynamic pressure only. System pressure would include static pressure minus friction losses.

Q4: How do I find pipe area?
A: For circular pipes: \( A = \pi \times (diameter/2)^2 \) (convert diameter to feet).

Q5: What's a typical velocity range?
A: Most systems design for 5-10 ft/s velocity to balance pressure drop and erosion concerns.