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BS EN 13463-2:2004
Non-electrical equipment for use in potentially explosive atmospheres. Protection by flow restricting enclosure "fr" (British Standard)
This European Standard specifies the requirements for the construction and testing of flow restricting enclosures for non-electrical equipment intended for use in potentially explosive atmospheres if the atmosphere outside the enclosure becomes explosive rarely and for short durations only. This standard supplements the requirements in EN 13463-1 the contents of which apply in full to equipment constructed in accordance with this standard. Equipment complying with this standard meets the requirements of Group II - Category 3 equipment. The type of ignition protection described in this standard is unsuitable for use in combination with another type of protection to produce equipment of any other category than category 3.
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British Standards Institution [bsi]
