<h2 class = 'uawtitle'>Facts About Cryogenic Gases That Need To Be Understood</h2><br />
<div style='font-style:italic;' class='uawbyline'>by Grace Rivas</div><br /><br />
<div class='uawarticle'>Cryogenic gases are gases that are kept in either liquid or gaseous form at extremely low temperatures. They have boiling points of low than -150 degrees Celsius. At normal temperature and pressure, these substances exist in their gaseous form. They usually have 2 main characteristics. The first characteristic is, when liquefied, small quantities of liquid can melt into very large quantities of gas. The 2nd property is that they are very cold.<br />
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Due to their extremely low temperature, they condense air to produce fog that the naked eye can see. When kept in tanks that are insulated insufficiently, they condense nearby air to create liquid and air mixture. They are categorized under compressed gasses by WHMIS criteria.<br />
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Every cryogenic substance has its own properties, although most of them can be placed in one of the following classes. The classes are, oxygen, inert and flammable gasses. Any inert gas does not have much chemical reaction with other substances. They include neon, Oregon, krypton, and nitrogen. Flammable gas can burn in atmospheric air. Common examples are liquefied natural gas, methane, and hydrogen among others. Most substances considered non-combustible burn when mixed with liquid oxygen. This makes it important to handle oxygen with precautions that are different from those of other cryogenics.<br />
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These substances are stored, transported, and used in containers that are highly insulated. The containers are designed in a way that they can withstand fast changes in temperature and they can also endure great temperature differences. Examples of containers that are used include laboratory liquid dewar flasks, liquid dewar flasks, and gas cylinders. Gas cylinders have valves for dispensing and filling the gas and pressure-control valves with frangible disks for backup protection.<br />
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There are many health hazards connected to these substances and care must be taken in handling them. The health dangers are classified into 3 groups, that is, asphyxiation, extreme cold, and toxicity. The cold gas and the associated vapor may cause effects on skins similar in appearance and effect as thermal burns. Brief exposures that cannot affect skins can affect delicate tissues such as eyes. Other effects are frostbite, pain, lung damage, and sticking on cold surfaces.<br />
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Many of <A href="http://bccryotech.com">cryogenic gases</A> are heavier than air. They therefore displace air and settle down on floors creating a vacuum of oxygen. Oxygen deficiency might cause asphyxiation and death. Hence it is not recommendable to handle these materials inside enclosed poorly ventilated spaces. Materials like carbon (II) Oxide are very toxic and might cause death immediately if they seep out into the surroundings.<br />
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These substances have numerous uses in various governmental, industrial and domestic applications. To start with, liquefied forms are employed as fuels for rockets and other fast planes. Other applications comprise of blood and food preservation, electrical power transmission, magnetic resonance imaging, nuclear magnetic resonance spectroscopy, and forward looking infrared. Certain rare groups of blood need to be maintained under extremely cold temperature to remain valuable. They are used to make detectors too.<br />
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Of all <A href="http://bccryotech.com">Cryogenic gases</A>, liquid nitrogen is the most widely used. It is legal for purchase and can be purchased from anywhere around the world. Dewar flasks are seemingly the best storage units used.<br />
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