COMPRESSED GASESDOE-HDBK-1015/2-93Hazards of Chemicals and GasesCH-05Rev. 0Page 28Compressed Gases Summary (Cont.)Non-liquified gases are gases that do not liquify in containers at ambienttemperatures and under pressures attained in commercially used containers thatrange to 2000 to 2500 psig.Liquified gases are gases which do become liquids to a very large extent incontainers at ordinary ambient temperatures, and at pressures from 25 to2500 psig.Dissolved gases are gases dissolved into a solution.The major families of gases are:atmospheric gasesaerosol gasesfuel gasespoison gasesrefrigerant gasesThe general safety precautions for gases:Ensure there is adequate ventilation of enclosed areas.Avoid entering unventilated areas that might contain high concentrations of gaswithout first putting on breathing apparatus with a self-contained or hose-line airsupply.Take precautions against skin or eye contact with liquified gases that are toxic orvery cold, or both.The proper storage and handling of containers avoids many possible incidents.The safety precautions for working with cryogenic liquids are:Stand clear of boiling or splashing liquid and its vapors.Never allow an unprotected part of the body to touch uninsulated pipes or vesselsthat contain cryogenic fluids.Use tongs, or a similar device, to withdraw objects immersed in a cryogenic liquid.Use appropriate eye and hand protection.
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