SIST EN 13463-2:2005
(Main)Non-electrical equipment for use in potentially explosive atmospheres - Part 2: Protection by flow restricting enclosure 'fr'
Non-electrical equipment for use in potentially explosive atmospheres - Part 2: Protection by flow restricting enclosure 'fr'
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.
Nicht-elektrische Geräte für den Einsatz in explosionsgefährdeten Bereichen - Teil 2: Schutz durch schwadenhemmende Kapselung 'fr'
Dieses Dokument legt die Anforderungen an den Bau und die Prüfung von schwadenhemmenden
Kapselungen für nicht-elektrische Geräte fest, die in explosionsgefährdeten Bereichen eingesetzt werden
sollen, wenn die Atmosphäre außerhalb des Gehäuses selten und für nur kurze Zeit explosionsfähig ist.
Dieses Dokument ergänzt die Anforderungen von EN 13463-1, die vollständig für Geräte gilt, deren
Konstruktion diesem Dokument entspricht.
Geräte, die der vorliegenden Norm entsprechen, erfüllen die Anforderungen an Geräte der Gruppe II Geräte-
kategorie 3. Die in der vorliegenden Norm beschriebene Zündschutzart ist nicht für die Verwendung in
Verbindung mit einer weiteren Zündschutzart zur Herstellung von Geräten geeignet, die nicht in die Geräte-
kategorie 3 fallen.
Appareils non électriques destinés a etre utilisés en atmospheres explosibles - Partie 2: Protection par enveloppe a circulation limitée 'fr'
Ce document spécifie les exigences concernant la construction et les essais d?enveloppes a circulation limitée
pour appareils non électriques destinés a etre utilisés dans des atmospheres explosibles si l?atmosphere a
l?extérieur de l?enveloppe devient explosive a de rares occasions et seulement pour de courtes durées.
Ce document complete les exigences de l?EN 13463-1, dont le contenu s?applique totalement aux appareils
construits conformément a ce document.
Les appareils conformes a la présente norme satisfont aux exigences relatives aux appareils du Groupe II et
de Catégorie 3. Le mode de protection contre l?explosion décrit dans la présente norme ne convient pas pour
etre associé a un autre mode de protection pour obtenir un appareil de toute catégorie autre que la
catégorie 3.
Neelektrična oprema za uporabo v potencialno eksplozivni atmosferi - 2. del: Zaščita z omejenim pretokom
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Non-electrical equipment for use in potentially explosive atmospheres - Part 2: Protection by flow restricting enclosure 'fr'Appareils non électriques destinés a etre utilisés en atmospheres explosibles - Partie 2: Protection par enveloppe a circulation limitée 'fr'Nicht-elektrische Geräte für den Einsatz in explosionsgefährdeten Bereichen - Teil 2: Schutz durch schwadenhemmende Kapselung 'fr'13.230Varstvo pred eksplozijoExplosion protectionICS:SIST EN 13463-2:2005enTa slovenski standard je istoveten z:EN 13463-2:200401-marec-2005SIST EN 13463-2:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13463-2November 2004ICS 13.230English versionNon-electrical equipment for use in potentially explosiveatmospheres - Part 2: Protection by flow restricting enclosure 'fr'Appareils non électriques destinés à être utilisés enatmosphères explosibles - Partie 2: Protection parenveloppe à circulation limitée 'fr'Nicht-elektrische Geräte für den Einsatz inexplosionsgefährdeten Bereichen - Teil 2: Schutz durchschwadenhemmende Kapselung 'fr'This 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 conditions 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 official 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, Belgium, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13463-2:2004: E
EN 13463-2:2004 (E) 2 Contents page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 General.5 4.1 General requirements.5 4.2 Determination of suitability.5 5 Specific requirements and limitations.6 5.1 Nature of ignition source.6 5.2 Test requirements.6 5.3 Enclosures without the provision for carrying out checks after installation.6 5.4 Enclosures with provisions for carrying out checks after installation.6 5.5 Resilient gaskets.7 5.6 Poured seals and encapsulating compounds.7 5.7 Internal fans or similar devices.7 5.8 Limits of operation.7 6 Verifications and tests.7 6.1 Preconditioning for seals and gaskets used to maintain the flow restricting effect.7 6.2 Tests.7 6.2.1 Equipment with provisions for checking of flow restricting properties.7 6.2.2 Equipment without provisions for checking of flow restricting properties.7 6.2.3 Equipment where the nominal volume of the enclosure changes due to pressure.8 6.2.4 Routine production test.8 7 Instructions for use.8 8 Marking.8 Annex ZA (informative)
Clauses of this European Standard addressing essential requirements or other provisions of EU Directives.9 Bibliography.13
EN 13463-2:2004 (E) 3 Foreword This document (EN 13463-2:2004) has been prepared by Technical Committee CEN/TC 305 “Potentially 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 standards 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 informative 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 explosive 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: Protection 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 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, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 13463-2:2004 (E) 4 Introduction An explosive 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 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 by 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. 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 the fulfilment of category 3 requirements. This document is a type B standard as described in EN 1070.
EN 13463-2:2004 (E) 5 1 Scope This document 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 document supplements the requirements in EN 13463-1 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 another 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 the 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 following apply. protection by flow restricting enclosure type 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 explosive 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 itself 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 empty enclosure.
EN 13463-2:2004 (E) 6 5 Specific requirements and limitations 5.1 Nature of ignition source Protection by flow restricting enclosures may be applied in the following circumstance: a) Enclosures containing mechanical sparks, and other ignition sources in normal operation but with a limitation in dissipated power such that the averaged air temperature within the enclosure does not exceed the external ambient temperature by more than 10 K. However the internal air temperature may exceed the external ambient
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