Pressure Pipe Velocity Calculator

Velocity Formula:

\[ V = \sqrt{\frac{2 \times (P_1 - P_2) \times 144}{\rho}} \]

Velocity (V): ft/s

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1. What is a Pressure Pipe Velocity Calculator?

Definition: This calculator determines fluid velocity in a pipe using the pressure difference between two points, based on Bernoulli's equation.

Purpose: It helps engineers and technicians estimate fluid flow velocity in pressurized pipe systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ V = \sqrt{\frac{2 \times (P_1 - P_2) \times 144}{\rho}} \]

Where:

\( V \) — Fluid velocity (feet per second)
\( P_1 \) — Inlet pressure (psi)
\( P_2 \) — Outlet pressure (psi)
\( \rho \) — Fluid density (pounds per cubic foot)

Explanation: The pressure difference is converted to psf (multiplied by 144), then used with density to calculate velocity.

3. Importance of Velocity Calculation

Details: Proper velocity estimation ensures efficient pipe sizing, prevents erosion, and maintains optimal flow conditions.

4. Using the Calculator

Tips: Enter both pressure values (psi) and fluid density (default 62.4 lb/ft³ for water). All values must be positive, with P₁ > P₂.

5. Frequently Asked Questions (FAQ)

Q1: What's the 144 factor in the equation?
A: It converts psi to psf (pounds per square foot) since 1 sq ft = 144 sq in.

Q2: What's a typical fluid density for water?
A: Water at 60°F has a density of 62.4 lb/ft³, which is the default value.

Q3: Does this account for pipe friction?
A: No, this is the ideal velocity. For real-world applications, consider friction losses.

Q4: What if my outlet pressure is higher than inlet?
A: The calculation will return NaN (not a number) since you can't take square root of negative.

Q5: Can I use this for gases?
A: Yes, but be sure to use the correct density for your gas at operating conditions.