Pe Water Supply Pipes
Reference data and engineering information about pe water supply pipes for water systems applications.
Overview
Engineering reference data for Pe Water Supply Pipes in water systems.
Key Formulas
Hydrostatic Pressure
Pressure due to water column.
Flow Rate
Area × velocity.
Variables
| Symbol | Description | Unit |
|---|---|---|
| Pressure | Pa | |
| Flow rate | m³/s | |
| Head/depth | m |
PE Water Supply Pipe Specifications
High-density polyethylene (HDPE) pipes are classified by their pressure rating—typically 100 psi for standard municipal water supply and 75 psi for lower-pressure applications. Pipes with the same nominal size may have different outside diameters and wall thicknesses depending on their pressure class.
Nominal Size(in) | Outside Diameter(in) | Wall Thickness(in) | Inside Diameter(in) | Weight(lb/ft) |
|---|---|---|---|---|
| 1/2 | 0.8 | 0.089 | 0.622 | 0.08 |
| 3/4 | 1.06 | 0.118 | 0.824 | 0.15 |
| 1 | 1.359 | 0.155 | 1.049 | 0.23 |
| 1-1/4 | 1.772 | 0.196 | 1.38 | 0.4 |
| 1-1/2 | 2.07 | 0.23 | 1.61 | 0.55 |
| 2 | 2.657 | 0.295 | 2.067 | 0.9 |
Source: engineeringtoolbox.com
Nominal Size(in) | Outside Diameter(in) | Wall Thickness(in) | Inside Diameter(in) | Weight(lb/ft) |
|---|---|---|---|---|
| 1/2 | 0.762 | 0.07 | 0.622 | 0.06 |
| 3/4 | 0.994 | 0.085 | 0.824 | 0.1 |
| 1 | 1.265 | 0.108 | 1.049 | 0.17 |
| 1-1/4 | 1.666 | 0.143 | 1.38 | 0.28 |
| 1-1/2 | 1.942 | 0.166 | 1.61 | 0.39 |
| 2 | 2.495 | 0.214 | 2.067 | 0.64 |
Source: engineeringtoolbox.com
Dimension Ratio (DR)
The dimension ratio relates the outside diameter to the wall thickness and is a key classification parameter for PE pipes:
A lower DR indicates a thicker wall and higher pressure capability. Typical PE pipe DR ratings include DR-9, DR-11, DR-13.5, DR-17, DR-21, and DR-26, each corresponding to a specific hydrostatic design basis.