133. The safety discs on carbon dioxide cylinders are set to release at 2,700 psi. Under normal circumstances this pressure will be reached at which temperature?

Carbon dioxide cylinder safety discs release at 2,700 psi, which occurs at approximately 135F due to the relationship between temperature and vapor pressure in liquefied gas cylinders. Lower temperatures result in pressures significantly below 2,700 psi, and this value is based on standard pressure-temperature tables used in marine firefighting references.