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Imperial Grey PVC Pipe
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How to
Measure Pipe Dimensions (6 mins)
Due to supplier shortages, we cannot guarantee that the wall thickness will match what is noted in the product descriptions.
Imperial (inch) PVC pipe is measured in inches. The measurement relates to the nominal bore (the "approximate" bore) of the pipe, NOT the outside diameter.
The outside diameter (O.D) and internal diameter (I.D) are set out in millimetres in a table below for the different pipe pressure ratings (or "classes"). Please note:Due to supplier shortages, we cannot guarantee that the wall thickness will match what is noted in the product descriptions.
| Pipe Size | Outside Diameter (mm) | Wall Thickness (mm) Class C, 9 bar | Wall Thickness (mm) Class E, 15 bar | Wall Thickness (mm) Class 7 (For threading) |
|---|---|---|---|---|
| 1/2" | 21.4 | 1.7 | 1.7 | 4 |
| 3/4" | 26.7 | 1.9 | 1.9 | 4.2 |
| 1" | 33.4 | 2.2 | 2.2 | 4.8 |
| 1 1/4" | 42.2 | 2.2 | 3.2 | 5.2 |
| 1 1/2" | 48.3 | 2.5 | 3.7 | 5.5 |
| 2" | 60.3 | 2.5 | 4.5 | 5.9 |
| 2 1/2" | 75.2 | 2.9 | 5.6 | - |
| 3" | 88.9 | 3.5 | 6.5 | - |
| 4" | 114.3 | 4.5 | 8.3 | - |
| 6" | 168.3 | 7.5 | 12.1 | - |
| 8" | 219.1 | 8.8 | 14.1 | - |
All of our inch industrial PVC (PVCU) pipe is supplied in a mid to dark grey colour and is WRAS approved for drinking water. As such, it is suitable for any potable water supply as well as many other process fluids.
Our inch PVC pipe is specified to operate at temperatures of between 0 and 60° centigrade (32 - 140° Fahrenheit). Users should be aware that PVC becomes more prone to impact damage at lower temperatures, and we recommend that if there is an impact risk at operational temperatures of below 5° Centigrade (41° Fahrenheit), then ABS pipe should be considered as an alternative. ABS pipe is far more impact resistant and will operate down to -40°C (-40°F).
Similar to other types of plastic pipe, the pressure rating for PVC pipe changes with temperature. As the temperature increases, the pressure rating falls. Use the table below to find the factor to multiply your pipe's pressure rating by to compensate for temperature:
| Operating Temperature °C | De-Rating Factor |
|---|---|
| <0 | Not recommended |
| 0-20 | As stated |
| 30 | 0.80 |
| 40 | 0.58 |
| 50 | 0.39 |
| 60 | 0.22 |
| >60 | Not recommended |
PVC inch pipe should only be supported by either plastic clips or rubber lined galvanised clips over short spans. Using rubber lined clips over long spans can cause issues if the pipe expands and contracts with temperature, as the pressure from the clips prevents the pipe from moving in accordance to the expansion/contraction.
As temperature increases, your pipe supports should be closer together; however, the table below provides a distance, between each pipe support point, at 20° Centigrade (increase by approximately 15% per 10° above 20°C):
| Pipe Size (Inches) | Minimum Space (mm) Between Support Centres |
|---|---|
| 1/2 | 800 |
| 3/4 | 900 |
| 1 | 1000 |
| 1 1/4 | 1100 |
| 1 1/2 | 1200 |
| 2 | 1300 |
| 3 | 1600 |
| 4 | 1800 |
| 6 | 2200 |
| 8 | 2500 |
| 10 | 2800 |