The expansion ratio of a liquefied and cryogenic substance is the volume of a given amount of that substance in liquid form compared to the volume of the same amount of substance in gaseous form, at a given temperature.[1]
If a sufficient amount of liquid is vaporized within a closed container, it produces pressures that can rupture the pressure vessel. Hence the use of pressure relief valves and vent valves.[2]
The expansion ratio of liquefied and cryogenic argon from the boiling point to ambient is 1 to 847, liquid hydrogen 1 to 851, liquid helium 1 to 757, liquid nitrogen 1 to 696, and liquid oxygen 1 to 860; Neon has the highest expansion ratio with 1 to 1438.[3][4]
See also
References
- ^ Rick Houghton (2007). Emergency Characterization of Unknown Materials. CRC Press. ISBN 0849379687. http://books.google.com/books?id=GA_0smWGxwwC&pg=PA22&dq=liquid+gas+%22Expansion+ratio%22&lr=&as_brr=0&ei=u5AHSYX-ApmctAPK_-X_AQ.
- ^ Safetygram-27 Cryogenic Liquid Containers
- ^ http://www.chemistry.ohio-state.edu/ehs/handbook/gases/cryosafe.htm
- ^ Cryogenic liquids-characteristics
External links
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