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Expansion ratio
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<p>The expansion ratio of a <a href="/facts/Liquification/vFtARMCN">liquefied</a> and <a href="/facts/Cryogenic/cw7dHAkp">cryogenic</a> substance is the <a href="/facts/Volume/aeAXCBUd">volume</a> of a given amount of that substance in <a href="/facts/Liquid/t9GkLWzt">liquid</a> form compared to the volume of the same amount of substance in <a href="/facts/Gaseous/hVVAoodV">gaseous</a> form, at room temperature and normal <a href="/facts/Atmospheric_pressure/wJLMSaVG">atmospheric pressure</a>. </p><p>If a sufficient amount of liquid is <a href="/facts/Vaporized/tgvIlJys">vaporized</a> within a closed container, it produces pressures that can rupture the <a href="/facts/Pressure_vessel/5mGeFbpQ">pressure vessel</a>. Hence the use of <a href="/facts/Pressure_relief_valve/45UdW15r">pressure relief valves</a> and vent valves are important. </p><p>The expansion ratio of <a href="/facts/Liquification/vFtARMCN">liquefied</a> and <a href="/facts/Cryogenic/cw7dHAkp">cryogenic</a> from the <a href="/facts/Boiling_point/E2BK9QoS">boiling point</a> to ambient is: </p> <ul><li><a href="/facts/Liquid_nitrogen/IGWI1h00">nitrogen</a> – 1 to 696</li> <li><a href="/facts/Liquid_helium/JYXCAcDf">liquid helium</a> – 1 to 745</li> <li><a href="/facts/Argon/QX6NRH6d">argon</a> – 1 to 842</li> <li><a href="/facts/Liquid_hydrogen/Vpk3Gb8P">liquid hydrogen</a> – 1 to 850</li> <li><a href="/facts/Liquid_oxygen/qnI0KDTb">liquid oxygen</a> – 1 to 860</li> <li><a href="/facts/Neon/5bF1FwGL">neon</a> – Neon has the highest expansion ratio with 1 to 1445.</li></ul>