1、October 2011 Translation by DIN-Sprachendienst.English price group 16No 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!$td“1819465www.din.deDDIN EN 15967Determination of maximum explosion pressure and the maximum rate ofpressure rise of gases and vapoursEnglish translation of DIN EN 15967:2011-10Verfahren zur Bestimmung des maximalen Explosionsdruckes und des maximalenzeitlichen Druckanstieges fr Gase und D
3、mpfeEnglische bersetzung von DIN EN 15967:2011-10Dtermination de la pression maximale dexplosion et de la vitesse maximale de monteen pression des gaz et des vapeursTraduction anglaise de DIN EN 15967:2011-10SupersedesDIN EN 13673-1:2003-09,DIN EN 13673-2:2005-12 andDIN EN 13673-2 Corrigendum1:2007-
4、08www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises pages0 .11939DIN EN 15967:2011-10 A comma is used as the decimal marker. Start of application The start of application of this standard is 1 October 2011. National foreword This standard
5、 has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres Explosion prevention and protection” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Sicherheitstechnische Grundstze (Safety Design Principles Standard
6、s Committee), Working Committee NA 095-02-09 AA Kenn-gren fr Stube, Gase und Dmpfe. Amendments This standard differs from DIN EN 13673-1:2003-09, DIN EN 13673-2:2005-12 and DIN EN 13673-2 Corri-gendum 1:2007-08 as follows: a) EN 13673-1:2003 and EN 13673-2:2005 have been combined in one standard wit
7、hout any technical modifications; b) DIN EN 13673-2 Corrigendum 1:2007-08 has been incorporated. Previous editions DIN EN 13673-1: 2003-09 DIN EN 13673-2: 2005-12 DIN EN 13673-2 Corrigendum 1: 2007-08 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15967 August 2011 ICS 13.230 Supersedes EN 1
8、3673-1:2003, EN 13673-2:2005English Version Determination of maximum explosion pressure and the maximum rate of pressure rise of gases and vapours Dtermination de la pression maximale dexplosion et de la vitesse maximale de monte en pression des gaz et des vapeurs Verfahren zur Bestimmung des maxima
9、len Explosionsdruckes und des maximalen zeitlichen Druckanstieges fr Gase und Dmpfe This European Standard was approved by CEN on 1 July 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 na
10、tional standard 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 v
11、ersion in 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
12、, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Management Centre: Avenue Marnix 17, B-1000
13、 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15967:2011: EEUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG EN 15967:2011 (E) 2 Contents Page Foreword 4Introducti
14、on .51 Scope 62 Normative references 63 Terms and definitions .64 Test method 74.1 Principle 74.2 Apparatus .74.2.1 General 74.2.2 Test vessel 74.2.3 Equipment for preparing the test mixture .84.2.4 Ignition system .84.2.5 Pressure measuring system .94.2.6 Temperature measuring device . 104.2.7 Safe
15、ty aspects . 104.3 Preparation and preservation of test samples 104.4 Procedure 114.4.1 Preparation of the test mixture 114.4.2 Determination of the explosion pressure pex, the maximum explosion pressure pmax, the rate of explosion pressure rise (dp/dt)exand the maximum rate of explosion pressure ri
16、se (dp/dt)max124.5 Expression of results . 144.5.1 Common aspects 144.5.2 Explosion pressure and maximum explosion pressure . 154.5.3 Rate of pressure rise and maximum rate of pressure rise . 154.6 Test report . 16Annex A (normative) Verification of maximum explosion pressure values . 18Annex B (nor
17、mative) Verification of maximum rate of pressure rise . 19Annex C (normative) Smoothing of pressure-time curves 22Annex D (informative) Conversion of the values for the flammable substance content 25D.1 Abbreviations and symbols . 25D.2 Substance characteristics of air . 25D.3 Definitions . 26D.4 Pr
18、eparation of the test mixture 26Annex E (informative) Example of an evaporator equipment for liquid flammable substances 29Annex F (informative) Example for test report form . 31Annex G (informative) Significant technical changes between this European Standard and the previous editions 34Annex ZA (i
19、nformative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC . 35Annex ZB (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 36Bibliography . 37DIN EN 15967:2011-10 EN 15967:2011 (E)
20、3 Figures Figure B.1 Plot of the rate of explosion pressure rise (dp/dt)exas a function of the test vessel volume V for H2-air mixtures (xH2 35 mol %) . 20 Figure B.2 Plot of the rate of explosion pressure rise (dp/dt)exas a function of the test vessel volume V for CH4-air mixtures (xCH4 10 mol %) .
21、 20 Figure B.3 Plot of the rate of explosion pressure rise (dp/dt)exas a function of the test vessel volume V for NH3-air mixtures (xNH3 23 mol %) . 21 Figure C.1 Example of a raw p(t) curve showing oscillations 23 Figure C.2 Example of a raw p(t) curve showing oscillations 23 Figure C.3 Schematic d
22、iagram showing the variation of (dp/dt)exas a function of a smoothing parameter . 24 Figure E.1 Evaporator equipment for producing test mixtures from liquid flammable substances . 29 Tables Table 1 Rules for rounding up (dp/dt)exand (dp/dt)maxvalues . 16Table A.1 Valuesafor verification of the appar
23、atus 18Table B.1 Valuesafor verification of the apparatusb19Table D.1 Formulas for the conversion 28Table G.1 The significant changes with respect to EN 13673-1:2003 and EN 13673-2:2005 34Table ZA.1 Correspondence between this European Standard and Directive 94/9/EC 35Table ZB.1 Correspondence betwe
24、en this European Standard and Directive 2006/42/EC 36DIN EN 15967:2011-10 EN 15967:2011 (E) 4 Foreword This document (EN 15967:2011) has been prepared by Technical Committee CEN/TC 305 “Potentially explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by DIN.
25、 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 February 2012, and conflicting national standards shall be withdrawn at the latest by February 2012. Attention is drawn to the possibility that som
26、e of the 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 13673-1:2003, EN 13673-2:2005. This document has been prepared under a mandate given to CEN by the Europ
27、ean 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 and B which are an integral part of this document. The significant changes between this European Standard and EN 13673-1:200
28、3 and EN 13673-2:2005 are given in Table G.1 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, Franc
29、e, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 15967:2011-10 EN 15967:2011 (E) 5 Introduction This European Standard describes te
30、st methods for the determination of: the explosion pressure and the maximum explosion pressure; and the rate of explosion pressure rise and the maximum rate of explosion pressure rise; of a quiescent flammable gas/air/inert mixture at ambient temperature and pressure. Maximum explosion pressure and
31、maximum rate of explosion pressure rise are used for designing explosion protection measures, such as explosion pressure resistant or explosion pressure shock resistant apparatus, explosion venting and explosion suppression. These characteristics are particularly influenced by: the size and shape of
32、 the vessel; the type and energy of the ignition source; the temperature and pressure; the turbulence. It is therefore necessary to standardise the conditions at which the maximum explosion pressure and the maximum rate of explosion pressure rise are determined. DIN EN 15967:2011-10 EN 15967:2011 (E
33、) 6 1 Scope This European Standard specifies a test method that is designed to produce measurements of explosion pressure and the maximum explosion pressure, the rate of explosion pressure rise and the maximum rate of explosion pressure rise of a quiescent flammable gas/air/inert mixture in closed v
34、olume at ambient temperature and pressure. In this European Standard, the term “gas“ includes vapours but not mists. Detonation and decomposition phenomena are not considered in this European Standard. The pressures and rates of pressure rise measured by the procedures specified in this European Sta
35、ndard are not applicable to flameproof enclosures, that is enclosures intended to withstand an internal explosion and not to transmit it to an external explosive atmosphere, or any other closed volume where the internal geometry can result in pressure piling. Even in an enclosure of relatively simpl
36、e geometry the disposition of the internal components can lead to rates of pressure rise significantly higher than those measured using this European Standard. This European Standard does not apply to the design and testing of flameproof enclosures in conformity with EN 13463-6 (for non-electrical e
37、quipment) and EN 60079-1 (for electrical equipment). 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 (includin
38、g any amendments) applies. EN 13237, Potentially explosive atmospheres Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres 3 Terms and definitions For the purpose of this European Standard, the terms and definitions given in EN 13237 and t
39、he following apply. 3.1 explosion pressure pexhighest pressure occurring in a closed vessel during the explosion of a specific mixture of flammable substances with air or air and inert gases determined under specified test conditions NOTE pexis expressed as absolute pressure with gases and vapour an
40、d as overpressure with dusts. 3.2 maximum explosion pressure pmaxmaximum value of explosion pressure measured in the tests for explosion pressure when the content of the flammable substances in the mixture is varied NOTE pmaxis expressed as absolute pressure with gases and vapour and as overpressure
41、 with dusts. 3.3 rate of explosion pressure rise (dp/dt)exhighest value of the slope (first derivative) of the pressure-time curve (smoothed if necessary), measured in a closed vessel during the explosion of a specific mixture of flammable substances with air or air and inert substances determined u
42、nder specified test conditions DIN EN 15967:2011-10 EN 15967:2011 (E) 7 3.4 maximum rate of explosion pressure rise (dp/dt)maxmaximum value of the explosion pressure rise per unit time measured in the tests when the content of the flammable substances in the mixture is varied NOTE For the purpose of
43、 this document, all pressures are expressed in bar absolute and rate of explosion pressure rises are expressed in bar/s. 4 Test method 4.1 Principle An explosive test mixture is ignited by a defined ignition source which is positioned in the centre of a test vessel. By means of a pressure measuring
44、system the pressure-time curve that develops following the ignition of the test mixture is recorded. From the pressure- time curve the highest rate of explosion pressure rise (dp/dt)exis calculated, and the highest pressure pexis determined. Repeat measurements are made with stepwise variations in t
45、he content of flammable gas in the mixture. a) The maximum explosion pressure pmaxis determined as the maximum observed value of pex. b) The maximum rate of explosion pressure rise (dp/dt)maxis determined as the maximum observed value of (dp/dt)ex4.2 Apparatus 4.2.1 General The test apparatus consis
46、ts of: a test vessel; equipment for preparing the test mixture; an ignition system; a pressure measuring system; a temperature measuring device; safety equipment. 4.2.2 Test vessel The test vessel shall be spherical or cylindrical. The internal volume of the test vessel shall be equal to or greater
47、than 0,005 m3. If a cylindrical vessel is used, the length to diameter ratio shall be equal to 1. The test vessel and any equipment (valves, igniter, transducer, etc) fitted on the vessel shall be designed to withstand a maximum pressure of at least 20 bar. NOTE Guidance on the design of the test ve
48、ssel can be found in EN 14460. The vessel shall be made of stainless steel or any material free of any catalytic effects and resistant to corrosion from the initial gas mixture and the products of combustion. DIN EN 15967:2011-10 EN 15967:2011 (E) 8 The test vessel shall be fitted with sufficient po
49、rts to allow filling, evacuating and purging. 4.2.3 Equipment for preparing the test mixture The test mixture can be prepared by a partial pressure method or mixing together flows of the component substances. This can be done in the test vessel or outside. If the test mixture is prepared by a partial pressure method, the vessel used for the preparation of the mixture shall be fitted with: a) a vacuum pump and a vacuu
