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IEVref:426-09-07ID:
Language:enStatus: Standard
Term: dilution
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Definition: continuous supply of a protective gas, after purging, at such a rate that the concentration of a flammable substance inside the pressurized enclosure is maintained at a value outside the flammable limits at any potential ignition source (that is to say, outside the dilution area)

Note 1 to entry: Dilution of oxygen by inert gas can result in a concentration of flammable gas or vapour above the upper flammable limit (UFL).


Publication date:2020-03
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