1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13237:2012Potentially explosive atmospheres Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheresBS EN 13237:2012
2、 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 13237:2012. It supersedes BS EN 13237:2003, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e E X L / 2 3 , E x p l o s i o n a n d f i r e p r e c a u
3、 t i o n s in industrial and chemical plant.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standa
4、rds Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 73876 0 ICS 01.040.13; 01.040.29; 13.230; 29.260.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strate
5、gy Committee on 30 November 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 13237:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13237 October 2012 ICS 01.040.13; 01.040.29; 13.230; 29.260.20 Supersedes EN 13237:2003English Version Potentially explosive atmosphere
6、s - Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres Atmosphres explosibles - Termes et dfinitions pour les appareils et systmes de protection destins tre utiliss en atmosphres explosibles Explosionsgefhrdete Bereiche - Begriffe fr Gert
7、e und Schutzsysteme zur Verwendung in explosionsgefhrdeten Bereichen This European Standard was approved by CEN on 1 September 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national sta
8、ndard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in
9、any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re
10、public, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPE
11、AN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13237:2012: EBS EN 13237:2012E
12、N 13237:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .5Annex A (informative) Definitions from the Directive 94/9/EC and corrigenda . 21Annex B (informative) Significant changes between this European Standard and EN 13237:2003 24Annex ZA (
13、informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9 EC . 25Bibliography . 26Figures Figure 1 Explosion area for a ternary system of test substance, air and inert gas . 9Figure 2 Relationship between ignition source definitions 16BS EN 13237:20
14、12EN 13237:2012 (E) 3 Foreword This document (EN 13237:2012) 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
15、, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN an
16、d/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 13237:2003. The significant changes between this European Standard and EN 13237:2003 are given in Annex B. This document has been prepared under a mandate given to CEN by the Europea
17、n Commission and the European Free Trade Association, and supports essential requirements of EU Directive 94/9/EC. For relationship with EU Directive 94/9/EC, see informative Annex ZA, which is an integral part of this document. According to the CEN/CENELEC Internal Regulations, the national standar
18、ds organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
19、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13237:2012EN 13237:2012 (E) 4 Introduction This European Standard has been produced to assist designers, manufacturers and other interested parties to u
20、se harmonised terms and definitions (vocabulary) for equipment and protective systems intended for use in potentially explosive atmospheres. It describes the vocabulary to be used to give all standards in this area an overall uniformity of terminology. Throughout this European Standard, the only haz
21、ard considered is the explosion of an explosive atmosphere. BS EN 13237:2012EN 13237:2012 (E) 5 1 Scope This European Standard specifies terms and definitions (vocabulary) to be used in suitable standards dealing with equipment and protective systems intended for use in potentially explosive atmosph
22、eres. NOTE Directive 94/9/EC concerning equipment and protective systems intended for use in potentially explosive atmospheres can be applicable to the type of machine or equipment covered by this European Standard. The present standard is not intended to provide means of complying with the essentia
23、l health and safety requirements of Directive 94/9/EC. 2 Normative references Not applicable. 3 Terms and definitions 3.1 ambient atmosphere normal atmosphere surrounding the equipment and protective system 3.2 ambient temperature temperature of the air or other medium where the equipment and protec
24、tive system are to be used 3.3 combustible dust dust able to undergo an exothermic reaction with air when ignited Note 1 to entry: The terms “flammable“ and “combustible“ are used synonymously. SOURCE: EN 14034-1:2004+A1:2011, 3.3 3.4 conductive dust dust with an electrical resistivity equal to or l
25、ess than 103m 3.5 continuous grade of release release which is continuous or is expected to occur frequently or for long periods SOURCE: EN 60079-10-1:2009, 3.11 3.6 deflagration explosion propagating at subsonic velocity SOURCE: ISO 8421-1:1987 3.7 degree of protection extent of protection provided
26、 by an enclosure against access to hazardous parts, against ingress of solid foreign objects and/or ingress of water and verified by standardised test methods SOURCE: EN 60529:1991 + A1:2000, 3.3 BS EN 13237:2012EN 13237:2012 (E) 6 Note 1 to entry: The enclosure which provides the degree of protecti
27、on IP is not necessarily identical with the types of protection as defined in EN 60079-0. 3.8 detonation explosion propagating at supersonic velocity and characterised by a shock wave SOURCE: ISO 8421-1:1987 3.9 dust small solid particles in the atmosphere which settle out under their own weight, bu
28、t which may remain suspended in air for some time SOURCE: EN 14034-1:2004+A1:2011, 3.1, modified Note 1 to entry: Generally combustible dusts with a median value below 500 m may form explosive dust/air-mixtures. 3.10 electrical equipment items applied as a whole or in part for the utilisation of ele
29、ctrical energy Note 1 to entry: These include, among others, items for the generation, transmission, distribution, storage, measurement, regulation, conversion and consumption of electrical energy and items for telecommunications. SOURCE: EN 60079-0:2009, 3.14 3.11 electrostatic leakage resistance e
30、lectrical resistance measured between an object and earth SOURCE: EN 14983:2007, 3.1 3.12 enclosure (of equipment or protective system) all the walls including doors, covers, cable entries, rods, spindles and shafts which contribute to the type of protection and/or their degree of protection (IP) 3.
31、13 equipment machines, apparatus, fixed or mobile devices, control components and instrumentation thereof and detection or prevention systems which, separately or jointly are intended for the generation, transfer, storage, measurement, control and conversion of energy and/or the processing of materi
32、al and which are capable of causing an explosion through their own potential ignition source Note 1 to entry: If equipment supplied to the user contains any interconnecting parts e.g. fastenings, pipes, etc. these form part of the equipment. Note 2 to entry: Simple apparatus with no moving parts, co
33、ntainers and pipes on their own are not considered as equipment under the scope of this European Standard. SOURCE: EN 13463-1:2009, 3.1 3.13.1 equipment Group I category M 1 equipment designed and, where necessary, equipped with additional special means of protection to be capable of functioning in
34、conformity with the operational parameters established by the manufacturer and ensuring a very high level of protection BS EN 13237:2012EN 13237:2012 (E) 7 Note 1 to entry: Equipment of this category is intended for use in underground parts of mines as well as those parts of surface installations of
35、 such mines endangered by firedamp and/or combustible dust. Note 2 to entry: Equipment of this category is required to remain functional even in the event of rare incidents relating to equipment, with an explosive atmosphere present, and is characterised by means of protection such that: either, in
36、the event of failure of one means of protection, at least an independent second means provides the requisite level of protection, or the requisite level of protection is assured in the event of two faults occurring independently of each other. SOURCE: EN 13463-1:2009, 3.2.1 3.13.2 equipment Group I
37、category M 2 equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a high level of protection Note 1 to entry: Equipment of this category is intended for use in underground parts of mines as well as those parts of s
38、urface installations of such mines likely to be endangered by firedamp and/or combustible dust. Note 2 to entry: This equipment is intended to be de-energised in the presence of an explosive atmosphere. Note 3 to entry: The means of protection relating to equipment in this category assure the requis
39、ite level of protection during normal operation, expected malfunctions, and also in the case of more severe operating conditions, in particular, those arising from rough handling and changing environmental conditions. SOURCE: EN 13463-1:2009, 3.2.2, modified 3.13.3 equipment Group II category 1 equi
40、pment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a very high level of protection Note 1 to entry: Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and
41、 gases, vapours or mists or by air/dust mixtures are present continuously, for long periods or frequently. Note 2 to entry: Equipment of this category ensures the requisite level of protection, even in the event of rare malfunctions relating to equipment, and is characterised by means of protection
42、such that: either, in the event of failure of one means of protection, at least an independent second means provides the requisite level of protection, or the requisite level of protection is assured in the event of two faults occurring independently of each other. SOURCE: EN 13463-1:2009, 3.2.3 3.1
43、3.4 equipment Group II category 2 equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a high level of protection Note 1 to entry: Equipment in this category is intended for use in areas in which explosive atmosphe
44、res caused by mixtures of air and gases, vapours or mists or by air/dust mixtures are likely to occur. Note 2 to entry: The means of protection relating to equipment in this category ensures the requisite level of protection, even in the event of frequently occurring disturbances or equipment faults
45、 which are normally taken into account. SOURCE: EN 13463-1:2009, 3.2.3 BS EN 13237:2012EN 13237:2012 (E) 8 3.13.5 equipment Group II category 3 equipment designed to be capable of functioning in conformity with the operational parameters established by the manufacturer and ensuring a normal level of
46、 protection Note 1 to entry: Equipment in this category is intended for use in areas in which explosive atmospheres caused by mixtures of air and gases, vapours or mists or by air/dust mixtures are unlikely to occur or, if they do occur, are likely to do so only infrequently and for a short period o
47、nly. Note 2 to entry: Equipment of this category ensures the requisite level of protection during normal operation. SOURCE: EN 13463-1:2009, 3.2.5 3.14 explosion abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously SOURCE: ISO 8421-1:19
48、87 3.15 explosion area area inside the boundary curve formed by the explosion limits of a flammable substance in various mixtures with air and inert gas Note 1 to entry: See Figure 1. Note 2 to entry: In many cases the limiting air concentration corresponds to the apex of the boundary curve. BS EN 1
49、3237:2012EN 13237:2012 (E) 9 Key 1 explosion area 2 apex 3 stoichiometric line x molar fraction in % IN inert gas TS test substance a air Figure 1 Explosion area for a ternary system of test substance, air and inert gas 3.16 explosion diverter passive device typically installed in a duct preventing flame jet ignition, pressure piling and reducing the probability of flame transmission into connected equipment SOURCE: EN 16020:2011, 3.2 3.17 explosion isolation flap valve flap valve able to stop expl
