ASME B31.9 - Working Pressure and Temperature
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 Limit |
| 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) |
|
