Propane Vapor Pressure

Overview

Engineering reference data for Propane Vapor Pressure in fluid mechanics.

Key Formulas

Reynolds Number

$Re = \frac{\rho v D}{\mu}$

Ratio of inertial to viscous forces — determines flow regime.

Bernoulli's Equation

$P + \frac{1}{2}\rho v^2 + \rho g h = \text{const}$

Conservation of energy for steady, inviscid, incompressible flow.

Continuity Equation

$A_1 v_1 = A_2 v_2$

Conservation of mass for incompressible flow.

Darcy-Weisbach

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Pressure drop due to friction in a pipe.

Variables

Pressure Conversion

The original content notes a critical distinction between pressure measurement systems:

Note on Pressure Types:

• The metric chart indicates gauge pressure (pressure above atmospheric).
• The imperial chart indicates absolute pressure (pressure above a perfect vacuum).

The conversion between imperial absolute pressure (psia) and gauge pressure (psig) is defined as: $psig = psia - 14.7 \text{ psi}$

This relationship is essential for accurate engineering calculations and comparing data presented in different units.

Related Thermophysical Properties

Beyond vapor pressure, several other properties of propane are critical for engineering applications and vary with temperature and pressure. These include:

• Density and specific weight
• Dynamic and kinematic viscosity
• Prandtl number
• Specific heat (heat capacity)
• Thermal conductivity and thermal diffusivity

References

• Original Source