Overview
Engineering reference data for Pe Pipe Pressure Loss in fluid mechanics.
Key Formulas
Reynolds Number
Ratio of inertial to viscous forces — determines flow regime.
Bernoulli's Equation
Conservation of energy for steady, inviscid, incompressible flow.
Continuity Equation
Conservation of mass for incompressible flow.
Darcy-Weisbach
Pressure drop due to friction in a pipe.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Reynolds number | — | |
| Fluid density | kg/m³ | |
| Flow velocity | m/s | |
| Characteristic dimension | m | |
| Dynamic viscosity | Pa·s | |
| Pressure | Pa | |
| Darcy friction factor | — |
Fluid Properties
The pressure loss calculations use the following properties for water at 20°C flowing through PE pipes:
| Property | Metric | Imperial |
|---|---|---|
| Fluid | Water | Water |
| Pipe | Polyethylene (PE) SDR Pressure Rated Tube | — |
| Temperature | 20.0 °C | 68.0 °F |
| Density | 998.3 kg/m³ | 62.0 lb/ft³ |
| Kinematic Viscosity | 1.004 × 10⁻⁶ m²/s | 1.08 × 10⁻⁵ ft²/s |
| Pipe Roughness Coefficient | 3.0 × 10⁻⁶ m | — |