BS EN 14373-2005 Explosion suppression systems《爆炸抑制系统》.pdf

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1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58The European Standard EN 14373:2005 has the status of a British StandardICS 13.230Explosion suppres

2、sion systemsBRITISH STANDARDBS EN 14373:2005BS EN 14373:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 24 November 2005 BSI 24 November 2005ISBN 0 580 47282 5request to its secretary.Cross-referencesThe British Standards which implement

3、international or European publications referred to in 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

4、purport to include all the necessary provisions of a 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 pag

5、e, pages 2 to 43 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this committee can be obtained on present to the responsible international

6、/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Standard is the official English language version of EN 14373:2005.The

7、 UK participation in its preparation was entrusted to Technical Committee FSH/23, Fire precautions in industrial and chemical plant, which has the responsibility to: aid enquirers to understand the text;EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 14373October 2005ICS 13.230English VersionExplo

8、sion suppression systemsSystmes de suppression dexplosion Explosionsunterdrckungs-SystemeThis European Standard was approved by CEN on 16 August 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status o

9、f 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

10、 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, Fi

11、nland, 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 EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NO

12、RMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14373:2005: EEN 14373:2005 (E) 2 Contents Page Foreword 5 1 Scope .6 2 Normative references .6 3 Terms and definitions.7

13、 4 Explosion suppression.10 4.1 General 10 4.2 Influencing factors11 4.2.1 General 11 4.2.2 The explosion hazard .11 4.2.3 The explosion suppressant12 4.2.4 The suppression system 12 4.2.5 Interrelation .12 5 General requirements for explosion suppression components13 5.1 Detection13 5.1.1 General 1

14、3 5.1.2 Optical detection.13 5.1.3 Pressure detection13 5.2 Suppressant 13 5.3 HRD-suppressors14 5.4 Control and Indicating Equipment, CIE.15 6 Requirements for the design of an explosion suppression system .15 6.1 General 15 6.2 Hazard definition.15 6.3 Determination of the pred, maxas a function o

15、f relevant influencing parameters.16 6.3.1 General 16 6.3.2 Validation by testing in one volume 16 6.3.3 Validation by testing in a second volume .22 6.3.4 Elongated enclosures.22 6.3.5 Pipes 23 6.3.6 Occupied spaces.23 6.4 Validation of system design guidelines 23 6.4.1 General 23 6.4.2 Design nomo

16、graph .24 6.4.3 Mathematical model for design25 6.5 Special applications26 6.5.1 Suppression combined with venting.26 6.5.2 Venting combined with suppression.27 6.5.3 Suppression combined with reduced oxygen concentrations27 6.5.4 Partial volumes .27 6.5.5 Segregated volumes.28 6.5.6 Obstructed volu

17、mes .28 6.6 Test report .29 7 Safety integrity of explosion suppression systems.30 7.1 General 30 7.2 Measures to avoid and control systematic faults.30 7.3 Control of electric connections .30 7.4 Indicators and messages CIE 30 7.5 Energy supply .31 8 Instructions for installation, commissioning and

18、 maintenance 31 EN 14373:2005 (E) 3 8.1 General 31 8.2 Installation of cables.31 8.3 Assembling31 8.3.1 General 31 8.3.2 Assembly.31 8.4 Commissioning .31 8.4.1 General 31 8.4.2 Commissioning phase31 8.4.3 Instruction .31 8.4.4 Commissioning report32 8.4.5 Safety.32 8.5 Maintenance 32 8.5.1 General

19、32 8.5.2 Servicing32 9 Marking and packaging 32 9.1 General 32 9.2 Explosion suppression system components .33 9.3 Explosion suppression system .34 9.4 Omission of markings 34 Annex A (informative) Development of nomograph type design guidelines .35 A.1 General 35 A.2 Design nomograph .35 Annex ZA (

20、informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC of 23 March 1994 39 Bibliography.42 Figures: Figure 1 Pressure behaviour versus time for a normal and suppressed explosion. 11 Figure 2 Effectiveness of suppressant 14 Figure 3 Pressure be

21、haviour and pressure rate of pressure rise versus concentration for a normal and suppressed explosion 17 Figure 4 Maximum reduced explosion pressure, pred, maxbehaviour versus maximum explosion constant, Kmax.18 Figure 5 Maximum reduced explosion pressure, pred, max behaviour versus activation press

22、ure, pa20 Figure 6 Maximum reduced explosion pressure, pred, max behaviour versus number of HRD-suppressors, HRDs20 Figure 7 Maximum reduced explosion pressure, pred, maxbehaviour versus dispersion agent pressure ps21 Figure 8 Design nomograph for a specific explosion suppression system 24 Figure 9

23、Calculated maximum reduced explosion overpressure versus measured maximum reduced explosion overpressure for pred, maxvalues up to 0,5 bar 25 Figure 10 Calculated maximum reduced explosion overpressure versus measured maximum reduced explosion overpressure for pred, maxvalues above 0,5 bar. 26 Figur

24、e 11 Example of an enclosure where an explosive concentration prevails only in the lower section 28 Figure A.1 Design nomograph for a specific explosion suppression system . 36 Figure A.2 Design guideline for a fuel range 37 Figure A.3 Volume limits of the design guideline for a fuel range . 37 EN 1

25、4373:2005 (E) 4 Tables: Table ZA.A1 Correspondence between this European Standard and Directive 94/9/EC 40 EN 14373:2005 (E) 5 Foreword This European Standard (EN 14373:2005) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres - Explosion prevention and protection”

26、, 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 April 2006, and conflicting national standards shall be withdrawn at the latest by April 2006. This Europ

27、ean Standard 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(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this European Standard

28、. 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,

29、Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14373:2005 (E) 6 1 Scope This European Standard describes the basic requirements for the design and application of explosion suppression systems. This European S

30、tandard also specifies a method for evaluating the effectiveness and the scale up of explosion suppression systems against defined explosions. It gives the criteria for alternative test apparatus used to undertake explosion suppression efficacy tests and criteria to be applied in defining the safe o

31、perating regime of an explosion suppression system. It covers: general requirements for explosion suppression components; evaluating the effectiveness of an explosion suppression system; evaluating the scale up of an explosion suppression system; evaluation and development of design tools for explos

32、ion suppression systems; instructions for installation of an explosion suppression system; maintenance instructions for an explosion suppression system. This European Standard is applicable only to explosion suppression systems intended for the protection of closed, or essentially closed, enclosures

33、 in which an explosion may result as a consequence of ignition of an explosible mixtures, e.g. dust-air mixtures, gas(vapour)-air mixtures, dust-gas(vapour)-air mixtures and mists. This European Standard is not applicable for explosions of materials listed below, or for mixtures containing some of t

34、hose materials: unstable materials that are liable to dissociate; explosive materials; pyrotechnic materials; pyrophoric materials. NOTE For the listed materials expert advice is required. 2 Normative references The following referenced documents are indispensable for the application of this Europea

35、n Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including amendments) applies. EN 1127-1:1997, Explosive atmospheres Explosion prevention and protection Part 1: Basic concepts and methodology EN 13237:2003, Pote

36、ntially explosive atmospheres Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres EN 13673-1, Determination of the maximum explosion pressure and the maximum rate of pressure rise of gases and vapours Part 1: Determination of the maximum e

37、xplosion pressure EN 13673-2, Determination of maximum explosion pressure and the maximum rate of pressure rise of gases and vapours Part 2: Determination of the maximum explosion pressure rise EN 14373:2005 (E) 7 EN 14034-1, Determination of explosion characteristics of dust clouds Part 1: Determin

38、ation of the maximum explosion pressure pmaxof dust clouds prEN 14034-2, Determination of explosion characteristics of dust clouds Part 2: Determination of the minimum rate of explosion pressure rise (dp/dt)maxof dust clouds prEN 14034-3, Determination of explosion characteristics of dust clouds Par

39、t 3: Determination of the lower explosion limit LEL of dust clouds EN 14034-4, Determination of explosion characteristics of dust clouds - Part 4: Determination of the limiting oxygen concentration LOC of dust clouds prEN 14491, Dust explosion venting protective systems prEN 14994, Gas explosion ven

40、ting protective systems EN 26184-3, Explosion protection systems Part 3: Determination of explosion indices of fuel/air mixtures other than dust/air and gas/air mixtures (ISO 6184-3:1985) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 1127-1

41、:1997, EN 13237:2003 and the following apply. 3.1 HRD-suppressor appliance containing an explosion suppressant, which can be expelled by the action of internal pressure NOTE 1 This pressure may be stored pressure, or may be obtained by a chemical reaction such as the activation of an explosive or py

42、rotechnic device. NOTE 2 HRD is the abbreviation of High Rate Discharge. 3.2 suppressant substance contained in the HRD-suppressor which, when dispersed into a volume to be protected, can arrest or prevent a developing explosion in that volume NOTE Three categories of suppressants are in general use

43、, separately or in combination: - powder suppressant; - water suppressant; - chemical suppressant. 3.2.1 powder suppressant powder with recognised flame extinguishing properties such as products based on monoammonium phosphate, potassium bicarbonate or sodium bicarbonate NOTE Such suppressants may c

44、ontain additives to improve their flow properties and their effectiveness. EN 14373:2005 (E) 8 3.2.2 water suppressant water, cold or hot, used as an explosion suppressant NOTE Additives may be included to provide frost protection, and/or to improve the suppressant effectiveness. 3.2.3 chemical supp

45、ressants chemical suppressants with recognised flame-extinguishing properties 3.3 dispersion agent pressure psmaintained pressure in a stored pressure-type suppressor at which the suppressant is dispersed, e.g. dry gas, chemical reaction or the application of heat 3.4 suppressant charge Msmass or vo

46、lume of the suppressant contained within the suppressor 3.5 explosion sensor device which is responsive to the changes, caused by a developing explosion, in one or more of the parameters such as pressure, temperature and/or radiation 3.6 explosion detector device or arrangement of apparatus, contain

47、ing one or more explosion sensors, that responds to a developing explosion by providing an explosion detection signal 3.7 activation pressure papressure threshold, above the pressure at ignition of the reactants (pi), at which a detection of the explosion is deemed to have occurred 3.8 reduced (supp

48、ressed) explosion pressure predexplosion overpressure, above the pressure at ignition of the reactants (pi), recorded in a suppressed explosion event 3.9 maximum reduced (suppressed) explosion pressure pred,max maximum explosion overpressure, above the pressure at ignition of the reactants (pi), rec

49、orded in a suppressed explosion event at optimum fuel concentration 3.10 explosion suppression technique by which burning in an explosive atmosphere is detected and arrested during incipient stages, restricting development of pressure 3.11 explosion suppression system composite arrangement of devices to detect automatically the onset of an explosion and initiate the deployment of suppressant so as to limit the destructive effects of the explosion EN 14373:2005 (E) 9 3.12 c