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    ANSI/ISA-12.04.04-2012 Pressurized Enclosures

    ANSI/ISA-12.04.04-2012 Pressurized Enclosures
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    This standard applies to equipment made suitable for use in hazardous (classified) locations by pressurizing the use of a pressurizing system.This standard applies both to equipment with and without an internal release of a flammable gas or vapor.This standard does not apply to occupied portions of...
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