Regarding the selection of flameproof cabinets and positive pressure fume hoods
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Experts, as the title suggests, under what conditions should an explosion-proof cabinet be chosen? Under what conditions is positive pressure fume hood used? Which standard? Thank you.
Treat them differently! For analyzers, it is not possible to operate them in explosion-proof enclosures in explosive environments; however, instruments can be operated in positive-pressure ventilation enclosures in such environments
Actually, this is not absolute; they are all explosion-proof designs, and in some applications a combination of flame isolation and positive pressure ventilation is used.
Either one will work; if there is corrosion, positive pressure ventilation is better