1、October 2011 Translation by DIN-Sprachendienst.English price group 18No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 13.230!$u+0“1820813www.din.deDDIN EN 1127-1Explosive atmospheres Explosion prevention and protection Part 1: Basic concepts and methodologyEnglish translation of DIN EN 1127-1:2011-10Explosionsfhige Atmosphren Explosionsschutz Teil 1: Grundlagen und MethodikEnglische bersetzung von DIN EN 1127-1:2
3、011-10Atmosphres explosives Prvention de lexplosion et protection contre lexplosion Partie 1: Notions fondamentales et mthodologieTraduction anglaise de DIN EN 1127-1:2011-10SupersedesDIN EN 1127-1:2008-02See start of applicationwww.beuth.deDocument comprises pagesIn case of doubt, the German-langua
4、ge original shall be considered authoritative.4610.11 DIN EN 1127-1:2011-10 A comma is used as the decimal marker. Start of application The start of application of this standard is 1 October 2011. DIN EN 1127-1:2008-02 may be used in parallel until 31 July 2014. National foreword This standard inclu
5、des safety requirements. This standard has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres Explosion prevention and protection”, Working Group WG 4 “Terminology and methodology” (Secretariat: DIN, Germany). The responsible German body involved in its preparation wa
6、s the Normenausschuss Sicherheitstechnische Grundstze (Safety Design Principles Standards Committee), Working Committee NA 095-02-06 AA Terminologie, Methodik. Amendments This standard differs from DIN EN 1127-1:2008-02 as follows: a) terms and definitions have been transferred to EN 13237; b) Claus
7、e 4 “Risk assessment” has been modified; c) in Annex C, information about the relationship between categories and zones has been deleted; d) information about the classification of zones for gases/vapours and for dusts has been deleted; e) in Annex B, information on tightness of equipment has been a
8、dded; f) in Annex D, information about concepts for the use of measuring and control systems to avoid effective ignition sources has been deleted. Previous editions DIN EN 1127-1: 1997-10, 2008-02 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1127-1 July 2011 ICS 13.230 Supersedes EN 1127-1
9、:2007English Version Explosive atmospheres - Explosion prevention and protection - Part 1: Basic concepts and methodology Atmosphres explosives - Prvention de lexplosion et protection contre lexplosion - Partie 1: Notions fondamentales et mthodologie Explosionsfhige Atmosphren - Explosionsschutz - T
10、eil 1: Grundlagen und Methodik This European Standard was approved by CEN on 18 June 2011. 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 standard without any alteration. Up-to-date l
11、ists 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 any other language made by translation und
12、er 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 Republic, Denmark, Estonia, Finland, France,
13、 Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NO
14、RMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1127-1:2011: EEN 1127-1:2011 (E) 2 Contents Page Foreword 4Introduction .51 Scope 62 Normative references 73 Terms and
15、definitions .84 Risk assessment 84.1 General 84.2 Identification of explosion hazards94.2.1 General 94.2.2 Combustion properties .94.2.3 Explosion behaviour 104.2.4 Likelihood of occurrence of a hazardous explosive atmosphere . 104.3 Identification of ignition hazards 114.3.1 General . 114.3.2 Ignit
16、ion properties 114.3.3 Likelihood of occurrence of effective ignition sources 124.4 Estimation of the possible effects of an explosion . 125 Possible ignition sources 135.1 Hot surfaces 135.2 Flames and hot gases (including hot particles) 135.3 Mechanically generated sparks . 145.4 Electrical appara
17、tus 145.5 Stray electric currents, cathodic corrosion protection. 145.6 Static electricity 155.7 Lightning 155.8 Radio frequency (RF) electromagnetic waves from 104Hz to 3 x 1011Hz 155.9 Electromagnetic waves from 3 x 1011Hz to 3.x 1015Hz 165.10 Ionizing radiation 165.11 Ultrasonics 165.12 Adiabatic
18、 compression and shock waves . 165.13 Exothermic reactions, including self-ignition of dusts. 176 Risk reduction . 176.1 Fundamental principles . 176.2 Avoidance or reduction of the amount of explosive atmosphere . 186.2.1 Process parameters . 186.2.2 Design and construction of equipment, protective
19、 systems and components . 196.3 Hazardous areas . 216.4 Requirements for the design and construction of equipment, protective systems and components by avoidance of effective ignition sources 216.4.1 General . 216.4.2 Hot surfaces 236.4.3 Flames and hot gases 246.4.4 Mechanically generated sparks .
20、246.4.5 Electrical apparatus 256.4.6 Stray electric currents and cathodic corrosion protection 256.4.7 Static electricity 266.4.8 Lightning 266.4.9 Radio frequency (RF) electromagnetic waves from 104Hz to 3 x 1011Hz 276.4.10 Electromagnetic waves from 3 x 1011Hz to 3 x 1015Hz 27DIN EN 1127-1:2011-10
21、 EN 1127-1:2011 (E) 3 6.4.11 Ionizing radiation . 286.4.12 Ultrasonics . 296.4.13 Adiabatic compression and shock waves 296.4.14 Exothermic reactions, including self-ignition of dusts . 306.5 Requirements for the design and construction of equipment, protective systems and components to reduce the e
22、xplosion effects . 306.6 Provisions for emergency measures 316.7 Principles of measuring and control systems for explosion prevention and protection 317 Information for use 317.1 General . 317.2 Information for commissioning, maintenance and repair to prevent explosion 327.3 Qualifications and train
23、ing . 33Annex A (informative) Information for the use of tools in potentially explosive atmospheres 34Annex B (informative) Tightness of equipment . 35B.1 General . 35B.2 Equipment which is durably technically tight 35B.3 Technically tight equipment . 37Annex C (informative) Significant technical ch
24、anges between this document and the previous edition of this European Standard . 38Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9 EC 40Annex ZB (informative) Relationship between this European Standard and the Essential Requirem
25、ents of EU Directive 2006/42/EC 41Bibliography 42DIN EN 1127-1:2011-10 EN 1127-1:2011 (E) 4 Foreword This document (EN 1127-1:2011) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by DIN.
26、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 January 2012, and conflicting national standards shall be withdrawn at the latest by July 2014. Attention is drawn to the possibility that some of t
27、he elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 1127-1:2007. This document has been prepared under a mandate given to CEN by the European Commission and the E
28、uropean Free Trade Association, and supports essential requirements of EU Directives. For relationship with EU Directives, see informative Annex ZA and ZB, which is an integral part of this document. Annex C provides details of significant technical changes between this European Standard and the pre
29、vious edition EN 1127-1:2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gre
30、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 1127-1:2011-10 EN 1127-1:2011 (E) 5 Introduction CEN and CENELEC are producing a set of standards
31、 to assist designers, manufacturers and other interested bodies to interpret the essential safety requirements in order to achieve conformity with European Legislation. Within this series of standards CEN has undertaken to draw up a standard to give guidance in the field of explosion prevention and
32、protection, as hazards from explosions are to be considered in accordance with EN ISO 12100. In accordance with EN ISO 12100, it is a type A standard. This standard describes the basic concepts and methodology of explosion prevention and protection. CEN/TC 305 has a mandate in this area to produce B
33、-type, and C-type standards, which will allow verification of conformity with the essential safety requirements. Explosions can occur from: a) materials processed or used by the equipment, protective systems and components; b) materials released by the equipment, protective systems and components; c
34、) materials in the vicinity of the equipment, protective systems and components; d) materials of construction of the equipment, protective systems and components. Since safety depends not only on equipment, protective systems and components but also on the material being handled and its use, this st
35、andard includes aspects related to the intended use and foreseeable misuse, i.e. the manufacturer should consider in which way and for which purpose the equipment, protective systems and components will be used and take this into account during its design and construction. This is the only way hazar
36、ds inherent in equipment, protective systems and components can be reduced. NOTE This standard may also serve as a guide for users of equipment, protective systems and components when assessing the risk of explosion in the workplace and selecting the appropriate equipment, protective systems and com
37、ponents. DIN EN 1127-1:2011-10 EN 1127-1:2011 (E) 6 1 Scope This European Standard specifies methods for the identification and assessment of hazardous situations leading to explosion and the design and construction measures appropriate for the required safety. This is achieved by: risk assessment;
38、risk reduction. The safety of equipment, protective systems and components can be achieved by eliminating hazards and/or limiting the risk, i.e. by: a) appropriate design (without using safeguarding); b) safeguarding; c) information for use; d) any other preventive measures. Measures in accordance w
39、ith a) (prevention) and b) (protection) against explosions are dealt with in Clause 6, measures according to c) against explosions are dealt with in Clause 7. Measures in accordance with d) are not specified in this European Standard. They are dealt with in EN ISO 12100:2010, Clause 6. The preventiv
40、e and protective measures described in this European Standard will not provide the required level of safety unless the equipment, protective systems and components are operated within their intended use and are installed and maintained according to the relevant codes of practice or requirements. Thi
41、s standard specifies general design and construction methods to help designers and manufacturers in achieving explosion safety in the design of equipment, protective systems and components. This European Standard is applicable to any equipment, protective systems and components intended to be used i
42、n potentially explosive atmospheres, under atmospheric conditions. These atmospheres can arise from flammable materials processed, used or released by the equipment, protective systems and components or from materials in the vicinity of the equipment, protective systems and components and/or from th
43、e materials of construction of the equipment, protective systems and components. This European Standard is applicable to equipment, protective systems and components at all stages of its use. This European Standard is only applicable to equipment group II which is intended for use in other places th
44、an underground parts of mines and those parts of surface installations of such mines endangered by firedamp and/or flammable dust. This European Standard is not applicable to: 1) medical devices intended for use in a medical environment; 2) equipment, protective systems and components where the expl
45、osion hazard results exclusively from the presence of explosive substances or unstable chemical substances; 3) equipment, protective systems and components where the explosion can occur by reaction of substances with other oxidizers than atmospheric oxygen or by other hazardous reactions or by other
46、 than atmospheric conditions; DIN EN 1127-1:2011-10 EN 1127-1:2011 (E) 7 4) equipment intended for use in domestic and non-commercial environments where potentially explosive atmospheres may only rarely be created, solely as a result of the accidental leakage of fuel gas; 5) personal protective equi
47、pment covered by Directive 89/686/EEC; 6) seagoing vessels and mobile offshore units together with equipment on board such vessels or units; 7) means of transport, i.e. vehicles and their trailers intended solely for transporting passengers by air or by road, rail or water networks, as well as means
48、 of transport insofar as such means are designed for transporting goods by air, by public road or rail networks or by water; vehicles intended for use in a potentially explosive atmosphere shall not be excluded; 8) the design and construction of systems containing desired, controlled combustion proc
49、esses, unless they can act as ignition sources in potentially explosive atmospheres. 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
