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.
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 366 oF (186 oC), minimum 0 oF (-18 oC) |
150 psig (1000 kPa) |
| Air, gases and vapors | maximum 200 oF (93 oC), minimum 0 oF (-18 oC) |
150 psig (1000 kPa) |
| Nonflammable Liquids | maximum 250 oF (121 oC), minimum 0 oF (-18 oC) |
350 psig (2300 kPa) |
