Cryogenic liquid definition

Cryogenic Liquid A cryogenic liquid is a refrigerated liquefied gas having a boiling point colder than -130 °F at one atmosphere, absolute. A material that meets this definition is subject to the same requirements tor compressed gases widrout regard to whether it meets the standard definition of a compressed gas. 

There is no strict definition of cryogenic, but a general consensus exists that liquids with boi ling points of-100°C (-148°F) or less are cryogenic liquids. 

The Definition of a Cryogenic Liquid, with Normal Boiling Point Below 273 K... 

Therefore, for the purpose of this monograph, we have adopted the definition of a cryogenic liquid as one with a normal boiling point below the triple point of water at 0.13 °C, or 273 K. The application of cryogenic fluid dynamics is then developed to describe and predict the behaviour of LNG, LPG and other hydrocarbon mixtures with NBPs below 273 K [4, 5]. 

Vapor Pressure Thermometry. The pressure exerted by a saturated vapor in equilibrium with its liquid is a very definite function of temperature, and can be used to measure the temperature of the liquid. A number of useful fixed points for several cryogenic fluids are given in Table 8.3. With a good pressure-measuring device, the vapor pressure thermometer is an excellent secondary standard since its temperature response depends upon a physical property of a pure compound or element. Many expressions have been... 

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