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News Release from: BSI British Standards | Subject: BS EN 60079-2:2007
Edited by the Processingtalk Editorial
Team on 28 February 2008
BS for pressurised enclosure equipment
protection
BSI, British Standards, has just published a revised guide to the specific requirements for the construction and testing of electrical apparatus with pressurized enclosures, of type of protection "p"
Equipment used in hazardous areas possess features specially designed to render them suitable for operations in such atmospheres It is essential for reasons of safety in those areas that, throughout the life of such installations, the integrity of those special features is preserved
This article was originally published on Processingtalk on 10 Jul 2006 at 8.00am (UK)
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The newly released BS EN 60079-2:2007 specifies requirements for pressurized enclosures containing a limited release of a flammable substance.
The standard gives requirements for the design, construction, testing and marking of electrical apparatus for use in potentially explosive atmospheres in which: a) a protective gas maintained at a pressure above that of the external atmosphere is used to guard against the formation of an explosive gas atmosphere within enclosures which do not contain an internal source of release of flammable gas or vapour; and, where necessary b) a protective gas is provided in sufficient quantity to ensure that the resultant mixture concentration around the electrical parts is maintained at a value outside the explosive limit appropriate to the particular conditions of use.
The protective gas is supplied to an enclosure containing one or more internal sources of release in order to guard against the formation of an explosive gas atmosphere.
BS EN 60079-2 includes requirements for the apparatus and its associated equipment including the inlet and exhaust ducts, and also for the auxiliary control apparatus necessary to ensure that pressurisation and/or dilution is established and maintained.
The price is GBP142, with a Member price of GBP71: ISBN 978 0 580 54512 2.
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