1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 16852:2010Flame arresters Performance requirements, test methods and limits for useCopyright European Committee for Standardization Provided by IHS under license with C
2、ENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 16852:2010.It is identical to ISO 16852:2008, including Cor 1:2008 and Cor 2:2009.It supersedes BS EN 12
3、874:2001, which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee FSH/23, Fire precautions in industrial and chemical plant. A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to in
4、clude all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011 ISBN 978 0 580 74465 5 ICS 13.220.10; 13.230 Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStand
5、ards Policy and Strategy Committee on 28 February 2011. Amendments issued since publicationDate Text affectedCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NOR
6、ME EUROPENNE EUROPISCHE NORM EN ISO 16852 April 2010 ICS 13.220.10 Supersedes EN 12874:2001English Version Flame arresters - Performance requirements, test methods and limits for use (ISO 16852:2008, including Cor 1:2008 and Cor 2:2009) Arrte-flammes - Exigences de performance, mthodes dessai et lim
7、ites dutilisation (ISO 16852:2008, Cor 1:2008 et Cor 2:2009 inclus) Flammendurchschlagsicherungen - Leistungsanforderungen, Prfverfahren und Einsatzgrenzen (ISO 16852:2008, einschlielich Cor 1:2008 und Cor 2:2009) This European Standard was approved by CEN on 16 April 2010. CEN members are bound to
8、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 lists and bibliographical references concerning such national standards may be obtained on application to the CEN Man
9、agement 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 under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as
10、 the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Rom
11、ania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved
12、 worldwide for CEN national Members. Ref. No. EN ISO 16852:2010: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010 EN ISO 16852:2010 (E) 3 Foreword The text o
13、f ISO 16852:2008, including Cor 1:2008 and Cor 2:2009 has been prepared by Technical Committee ISO/TC 21 “Equipment for fire protection and fire fighting” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 16852:2010 by Technical Committee CEN/TC 305 “Poten
14、tially 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 October 2010, and conflicting national
15、standards shall be withdrawn at the latest by October 2010. Attention is drawn to the possibility that some 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 E
16、N 12874:2001. 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(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this do
17、cument. 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, Greece, Hungary, Iceland,
18、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 16852:2008, including Cor 1:2008 and Cor 2:2009 has been approved by CEN as a EN ISO 16852:
19、2010 without any modification. According to edition 2001 the following fundamental changes are given: explosion group IIA1, with a methane-air test mixture included; approval of in-line flame arrester (deflagration or detonation) limited to operational pressures less than or equal to the applied tes
20、t pressure; maximum limit for short time burning of 30 min extended; procedure for calculating the critical volume flow rate for endurance burning changed from a temperature to a time based criterion; testing of high velocity vent valves revised; testing of flow controlled apertures deleted; types o
21、f detonation flame arresters extended to four types. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010EN ISO 16852:2010 (E) 4 ISO 16852 has been developed from
22、 existing national and international standards on flame arresters. These include the following standards: Z343-98 (Canada), 33CFR 154 (United States Coast Guard), UL 525 (Underwriter Laboratories, USA), IMO MSC/Circ. 677 (International Maritime Organization) and EN 12874 (European Committee for Stan
23、dardization). The requirements of ISO 16852 that deviate from those of EN 12874:2001 are detailed described below: 1) According its scope ISO 16852 is not applicable to flame arresters integrated in or combined with explosion protected equipment. So, in terms of Directive 94/9/EC, ISO 16852 covers p
24、rotective systems only and not explosion protected equipment. Furthermore ISO 16852 also does not cover other protective systems, which prevent flame transmission by suppression or isolation of explosions; these different techniques find their reflection in specific CEN standards. 2) ISO 16852 defin
25、es atmospheric conditions which comply with the “Guidelines on the Application of Directive 94/9/EC, Section 4“. 3) The requirements for ethylene-air test mixtures when expressed as “percent vapour in air by volume” have been adjusted slightly as a result of more precise figures from re-evaluations
26、of safe gap data becoming available. 4) Specific requirements in EN 12874 on the strength of materials do not apply any more. The international working group took the unanimous view that strength of equipment is sufficiently and simultaneously proved by the explosion load generated by the flame tran
27、smission type tests. 5) All welded constructions are now required to undergo a routine pressure test. 6) An additional explosion group IIA1, with a methane-air test mixture, has been added to take account of the increasing importance of biogenic generated explosive mixtures. 7) ISO 16852 extends the
28、 upper limit of the design series from 400 mm to 1000 mm flange connections. 8) For end-of-line flame arresters with non-measurable elements, the safety margin is achieved by increasing the severity of the flame transmission test (higher test pressure) rather than requiring thicker flame arrester el
29、ements in the production units. 9) Flame arresters for use with directly combined separate pressure-vacuum-valves shall be tested in the same way as flame arresters that have integrated pressure-vacuum-valves. 10) For any in-line flame arrester (deflagration or detonation) the approval is limited to
30、 operational pressures less than or equal to the applied test pressure. “Atmospheric testing” and subsequent approval for operational pressures up to the limit of 1,1 bar absolute is not accepted under ISO 16852. 11) There are minor revisions of the pressure ratios characterizing unstable detonation
31、s and the range of pipe sizes has been extended to 1000 mm and above. 12) For any in-line detonation arrester additional deflagration tests with a run-up length of five pipe diameters are now required. The number of deflagration tests has also been increased from three to five for each run-up length
32、 tested. 13) The classification of detonation arresters is widened from two types to four types, to include arresters for stopping detonations in installations with pipe restrictions. Guidance on the proper use of a detonation arrester type is given in the clause “Limits for use” and in the informat
33、ive Annex D. 14) The period for the short time burning test has been extended from a 1 min limit to a maximum limit of 30 min. The test period is specified by the manufacturer of the flame arrester and has to be included in the information marked on the flame arrester. 15) For endurance burn testing
34、 of static flame arresters, the procedure for calculating the critical volume flow rate has been changed from a temperature to a time based criterion. This change was necessary as a result of problems with applying the temperature criterion when testing large sizes of flame arrester. The rest of the
35、 endurance burn test procedure is unchanged. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010 EN ISO 16852:2010 (E) 5 16) The procedure for testing high veloc
36、ity vent valves has been extensively revised as a result of recent test experience. The undamped oscillation testing of these devices (Annex A.4) has also been revised. 17) The testing of flow controlled apertures is not covered by ISO 16852. This is mainly because the safety of these devices largel
37、y depends on peripheral equipment and how they are installed, which would not be assessed by the type tests specified in the standard. 18) Extension of the types of detonation arrester to four (Type 1 to Type 4) and the introduction of the burn time classes (Burning Class a, b and c) were introduced
38、 to take account of the requirements of the North American market. To aid the user in selecting the correct type of arrester for their application from the many possible combinations of detonation type and burn class a warning label is now required specifying the arrester type and its application li
39、mits. Flame arresters shall be used as an integral part of a package of explosion protection measures to fulfil the European ATEX directives. A risk assessment shall be used to develop a safety concept for the system to be protected. This can then be used for selecting the correct type of arrester,
40、for example a deflagration flame arrester, stable detonation flame arrester or unstable detonation flame arrester, to provide the required level of protection. If the risk of an explosion is high it may be necessary to use more than one flame arrester, of different types, to protect the system and i
41、n some cases in combination with other explosion protection measures. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010EN ISO 16852:2010 (E) 6 Annex ZA (inform
42、ative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC concerning equipment and protective systems for use in potentially explosive atmospheres This European Standard has been prepared under a mandate given to CEN by the European Commission and the
43、European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 94/9/EC concerning equipment and protective systems for use in potentially explosive atmospheres Once this standard is cited in the Official Journal of the European Union under th
44、at Directive and has been implemented as a national standard in at least one Member State, compliance with the clauses of this standard given in table ZA confers, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirements of that Direct
45、ive and associated EFTA regulations. Table ZA Correspondence between this European Standard and Directive 94/9/EC concerning equipment and protective systems for use in potentially explosive atmospheres Clause(s)/sub-clause(s) of this EN Essential Requirements (ERs) of Directive 94/9/EC Qualifying r
46、emarks/Notes Clause 5; 6.2; Annex D 1.0.1 Principles of integrated explosion safety 6.2; 7.1 1.0.2 Design and manufacture considerations Annex C 1.0.3 Special checking and maintenance conditions 6.2 1.0.4 Surrounding area conditions 11.2 1.0.5 Marking 7.4; 8.4; 9.4; 10.3; 11.1 1.0.6 Instructions 6.2
47、; 7.1; Annex C 1.1.1 Operational stresses on material 6.2; Annex C 1.1.2 Reaction of material 6.2; 7.1 1.1.3 Wear of material 5.1; 6.2; 6.3; 6.4; 6.5; 7.1; 1.2.1 Design and construction for safe operation 6.6 1.2.3 Enclosed structures and prevention of leaks Copyright European Committee for Standard
48、ization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN ISO 16852:2010 EN ISO 16852:2010 (E) 7 11.1 1.2.5 Additional mans of protection 7.3.4; 10.1 1.2.8 Overloading of equipment 6.3; 6.4; 7.3.2.3 1.2.9 Flameproof enclosu
49、re systems 6.2 1.3.1 Hazards arising from different ignition sources Annex B; Annex C 1.3.2 Hazards arising from static electricity 6.2 1.4.1 External effects 6.2 1.4.2 Mechanical, thermal and chemical stresses 6.4 1.6.4 Hazards arising from connections 6; 7; 8; 9; 10 3.0.1 Dimensioning 6; 7; 8; 9; 10 3.0.2 Design and position 6.5; 7.3.3 3.1.2 Shock waves WA
