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Technique of applying a protective gas to an enclosure in order to prevent the formation of an explosive atmosphere inside the enclosure by maintaining an overpressure against the surrounding atmosphere, and where necessary by using dilution (EN 50016:1995). Pressurisation with continuous flow of the protective gas: maintenance of an overpressure within a pressurized enclosure with continuous flow of the protective gas through the enclosure (EN 50016:1995) EN 13237:2003 (E). Static pressurization: maintenance of an overpressure within a pressurised enclosure without the addition of protective gas in a hazardous area (EN 50016:1995) NOTE The term is related to the type of protection ?Pressurisation? Cross references: EN 13237:2003 (E) Pressurization: technique of guarding against the ingress of the external dust atmosphere, which may be explosive, into an enclosure by maintaining a protective gas therein at a pressure above that of the external atmosphere.