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 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) |