1. What is Pipe Pressure from Flow Rate?

Definition: This calculator determines the pressure generated in a pipe system based on fluid flow rate, pipe cross-sectional area, and fluid density.

Purpose: It helps engineers and technicians design and analyze piping systems to ensure proper pressure conditions.

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 flow velocity from flow rate and pipe area, then determines pressure from velocity and fluid density.

3. Importance of Pressure Calculation

Details: Proper pressure estimation ensures pipe systems can handle the flow without excessive pressure drops or pipe stress.

4. Using the Calculator

Tips: Enter the 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 divide by 144 in the pressure formula?
A: This converts from lb/ft² to psi (1 ft² = 144 in²).

Q3: What's a typical water density value?
A: Pure water at 60°F is about 62.4 lb/ft³, but this varies with temperature and impurities.

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

Q5: Does this account for friction losses?
A: No, this calculates dynamic pressure only. For complete system analysis, include friction losses.