CPVC Pipes - Operating and Collapsing Pressures vs. Schedule and Size
Maximum operating and bursting pressures of CPVC - Chlorinated Poly (Vinyl Chloride) - piping systems.
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Maximum operating and collapsing pressures at 70oF (21oC) for CPVC piping systems according
- ASTM F441 / F441M - 02 Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Pipe, Schedules 40 and 80
- ASTM D2846 / D2846M - 06 Standard Specification for Chlorinated Poly(Vinyl Chloride) (CPVC) Plastic Hot- and Cold-Water Distribution Systems
are indicated in the diagram and table below:
| Nominal Pipe Size (inches) | Collapse Pressure (psi) | Maximum Operating Pressure (psi) | ||
|---|---|---|---|---|
| Schedule 40 | Schedule 80 | Schedule 40 | Schedule 80 | |
| 1/2 | 1605 | 2006 | 590 | 850 |
| 3/4 | 1219 | 1740 | 480 | 690 |
| 1 | 948 | 1628 | 450 | 630 |
| 1 1/4 | 511 | 1399 | 365 | 520 |
| 1 1/2 | 366 | 1034 | 330 | 470 |
| 2 | 213 | 653 | 275 | 400 |
| 2 1/2 | 276 | 758 | 300 | 420 |
| 3 | 179 | 521 | 260 | 370 |
| 4 | 108 | 334 | 220 | 320 |
| 6 | 54 | 214 | 180 | 280 |
| 8 | 37 | 146 | 160 | 250 |
| 10 | 27 | 125 | 140 | 230 |
| 12 | 22 | 116 | 130 | 230 |
- 1 psi (lb/in2) = 6,894.8 Pa (N/m2)
Note! The maximum operating pressures derates with temperature. At the maximum operating temperature for CPVC - 200oF (93oC) - the strength is derated to approximately 20% of the strength at 73oF (23oC).
Be aware that maximum operating pressures varies with the fittings design. Consult manufacturing data.
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