HVACR Glossary

Compressed gas
A gas or mixture of gases in a closed container having an absolute pressure exceeding 40 psi at 70°F (21.2°C) or an absolute pressure exceeding 104 psi at 130°F (54.4°C) regardless of the pressure at 70°F (21.2°C). Also a liquid having a vapor pressure exceeding 40 psi at 100°F (38C) as determined by ASTM D-323-72.