ASME B31.9 Building Services Piping - Working Pressure and Temperature Limits
The working pressure and temperature limits of ASME Code B31.9 - Building Services Piping.
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ASME B31.9 Building Services Piping applies to the following building services:
- Condensing water
- Water for heating and cooling
- Steam and condensate
- Vacuum
- Compressed air and nontoxic nonflammable gases
The working pressure and temperature limits of B31.9 can be summarized to:
| Service | Temperature Limits | Pressure Limits |
|---|---|---|
| Steam and condensate | maximum 366oF (186oC), minimum 0oF (-18oC) | 150 psig (1000 kPa) |
| Air, gases and vapors | maximum 200oF (93oC), minimum 0oF (-18oC) | 150 psig (1000 kPa) |
| Nonflammable Liquids | maximum 250oF (121oC), minimum 0oF (-18oC) | 350 psig (2300 kPa) |
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