1、BRITISH STANDARDBS EN 13463-2:2004Non-electricalequipment for use in potentially explosive atmospheres Part 2: Protection by flow restricting enclosure frThe European Standard EN 13463-2:2004 has the status of a British StandardICS 13.230g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g4
2、4g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 13463-2:2004This Bri
3、tish Standard was published under the authority of the Standards Policy and Strategy Committee on 22 July 2005 BSI 22 July 2005ISBN 0 580 46126 2National forewordThis British Standard is the official English language version of EN 13463-2:2004.The UK participation in its preparation was entrusted to
4、 Technical Committee FSH/23, Fire precautions in industrial and chemical plant, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests i
5、nformed; monitor related international and European developments and promulgate them in the UK.A list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in
6、 this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a
7、contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover.The BSI copyright n
8、otice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPEN
9、NEEUROPISCHE NORMEN 13463-2November 2004ICS 13.230English versionNon-electrical equipment for use in potentially explosiveatmospheres - Part 2: Protection by flow restricting enclosure frAppareils non lectriques destins tre utiliss enatmosphres explosibles - Partie 2: Protection parenveloppe circula
10、tion limite frNicht-elektrische Gerte fr den Einsatz inexplosionsgefhrdeten Bereichen - Teil 2: Schutz durchschwadenhemmende Kapselung frThis European Standard was approved by CEN on 14 October 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditi
11、ons for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three offic
12、ial versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belg
13、ium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT
14、EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13463-2:2004: ELicensed Copy: Institute Of Technology Tallaght, Institu
15、te of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-2:2004 (E) 2Contentspage Foreword.3Introduction .41 Scope .52 Normative references .53 Terms and definitions .54 General.54.1 General requirements.54.2 Determination of suitability .55 Specific requirements and
16、limitations.65.1 Nature of ignition source .65.2 Test requirements.65.3 Enclosures without the provision for carrying out checks after installation.65.4 Enclosures with provisions for carrying out checks after installation.65.5 Resilient gaskets.75.6 Poured seals and encapsulating compounds .75.7 In
17、ternal fans or similar devices.75.8 Limits of operation.76 Verifications and tests .76.1 Preconditioning for seals and gaskets used to maintain the flow restricting effect.76.2 Tests.76.2.1 Equipment with provisions for checking of flow restricting properties .76.2.2 Equipment without provisions for
18、 checking of flow restricting properties.76.2.3 Equipment where the nominal volume of the enclosure changes due to pressure .86.2.4 Routine production test .87 Instructions for use .88 Marking .8Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provi
19、sions of EU Directives.9Bibliography .13Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-2:2004 (E) 3Foreword This document (EN 13463-2:2004) has been prepared by Technical Committee CEN/TC 305 “Potential
20、ly explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standar
21、ds shall be withdrawn at the latest by May 2005. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 94/9/EC of 23 March 1994. For relationship with EU Directive(s), see i
22、nformative Annex ZA, which is an integral part of this document. This European Standard consists of the following parts: EN 13463-1, Non-electrical equipment for potentially explosive atmospheres - Part 1: Basic method and requirements.EN 13463-2, Non-electrical equipment for use in potentially expl
23、osive atmospheres - Part 2: Protection by flow restricting enclosure fr.prEN 13463-3, Non-electrical equipment for potentially explosive atmospheres - Part 3: Protection by flameproof enclosure d.EN 13463-5, Non-electrical equipment intended for use in potentially explosive atmospheres - Part 5: Pro
24、tection by constructional safety c.prEN 13463-6, Non-electrical equipment for potentially explosive atmospheres - Part 6: Protection by control of ignition source b.EN 13463-8, Non-electrical equipment for potentially explosive atmospheres - Part 8: Protection by liquid immersion k. According to the
25、 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembo
26、urg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-2:2004 (E) 4Introduction An explosive
27、 atmosphere surrounding an enclosure can penetrate it mainly due to the influence of three mechanisms: ventilation; equalisation of pressure differences between the inside and outside (breathing); diffusion. If such an enclosure is effectively sealed, but not necessarily gas-tight, it can be assumed
28、 that ventilation and diffusion will not cause a significant short-time exchange of atmosphere. Under these conditions, an exchange of the external and internal atmospheres through the seals will only take place if there is a pressure difference across them. Such pressure differences may be caused b
29、y changes in temperature and will result in the enclosure breathing but will not cause a significant flow of explosive atmosphere into or through the enclosure. Experience has shown that even simple enclosures can prevent a surrounding explosive atmosphere from reaching ignition sources inside them.
30、 Flow restricting enclosures are such simple enclosures, which will prevent, with adequate probability, the atmosphere inside the enclosures becoming explosive if the atmosphere outside the enclosure becomes explosive rarely and for short durations only. For this reason their use is restricted to th
31、e fulfilment of category 3 requirements. This document is a type B standard as described in EN 1070.Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:14:34 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-2:2004 (E) 51 Scope This document specifies the require
32、ments 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 document supplements the requirements in EN 134
33、63-1 the contents of which apply in full to equipment constructed in accordance with this document. 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 ano
34、ther type of protection to produce equipment of any other category than category 3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of th
35、e referenced document (including any amendments) applies. EN 13463-1:2001, Non-electrical equipment for potentially explosive atmospheres Part 1: Basic method and requirements.3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13463-1:2001 and the follow
36、ing apply. protection by flow restricting enclosuretype of ignition protection which, by means of an enclosure, reduces the probability of ingress of a surrounding explosive atmosphere into the enclosure to an acceptably low level so that the concentration inside the enclosure is below the lower exp
37、losive limit 4 General 4.1 General requirements The requirements of this document apply in addition to the requirements of EN 13463-1. Flow restricting enclosures used to protect Group II Category 3 equipment may contain ignition sources which occur during normal operation provided the enclosure its
38、elf is not an ignition source. The type of protection shall not be used if the ignition source is an open flame. 4.2 Determination of suitability The equipment manufacturers ignition hazard assessment required by EN 13463-1 shall have determined that protection by flow restricting enclosure is appropriate to achieve the level of protection required by Group II Category 3 equipment. NOTE Equipment manufacturer means the manufacturer who applies flow restricting enclosures to protect the equipment that may contain ignitions sources under normal operation. It is not the manufacturer of the
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