1、BRITISH STANDARDBS EN 3-8:2006Incorporating corrigendum October 2007Portable fire extinguishers Part 8: Additional requirements to EN 3-7 for the construction, resistance to pressure and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 barICS 13.220.10g4
2、9g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3-8:2006This British Standard was published under the authority of the Standards Policy and Stra
3、tegy Committee on 31 January 2007 BSI 2008ISBN 978 0 580 60916 9National forewordThis British Standard is the UK implementation of EN 3-8:2006, incorporating corrigendum October 2007. It partially supersedes BS EN 3-3:1996. BS EN 3-8:2006, together with BS EN 3-9:2006, updates and amends the require
4、ments that were previously contained in BS EN 3-3:1996, which is now withdrawn.The UK participation in its preparation was entrusted to Technical Committee FSH/2, Fire extinguishers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication doe
5、s not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publicationDate Comments31 March 2008 Implementation of CEN corr
6、igendum October 2007 footnote 2) deleted and footnotes 3), 4) and 5) renumbered as footnotes 2), 3) and 4)EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3-8December 2006ICS 13.220.10 Incorporating corrigendum October 2007English VersionPortable fire extinguishers - Part 8: Additional requirements
7、 toEN 3-7 for the construction, resistance to pressure andmechanical tests for extinguishers with a maximum allowablepressure equal to or lower than 30 barExtincteurs dincendie portatifs - Partie 8: Exigencesadditionnelles lEN 3-7 pour la construction, la rsistance la pression et les essais mcanique
8、s pour extincteursdont la pression maximale admissible est infrieure ougale 30 barTragbare Feuerlscher - Teil 8: Zustzliche Anforderungenzu EN 3-7 an die konstruktive Ausfhrung, Druckfestigkeit,mechanische Prfungen fr tragbare Feuerlscher miteinem maximal zulssigen Druck kleiner gleich 30 barThis Eu
9、ropean Standard was approved by CEN on 2 November 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references c
10、oncerning 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 in any other language made by translationunder the responsibility of a CEN member into its own
11、 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, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
12、 Malta, Netherlands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exp
13、loitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3-8:2006: E2 Contents Page Foreword4 1 Scope 5 2 Normative references 5 3 Terms and definitions .6 4 Symbols and abbreviations 6 5 Materials .7 5.1 Materials for bodies.7 5.2 Materials for the bodies of ope
14、rating devices and filling caps.7 5.3 Materials for other components.7 6 Experimental design method and prototype testing7 6.1 General7 6.2 Experimental design8 6.3 Prototype testing .9 6.4 Overfill pressure test (for water based media cartridge operated extinguishers only) .13 6.5 Resistance to imp
15、act.13 7 Manufacturing 13 7.1 General requirements13 7.2 Welded and brazed parts 13 7.3 Traceability.14 8 Inspection and testing during production 14 8.1 Final examination.14 8.2 Burst test 15 9 Marking .16 9.1 General16 9.2 Body 16 9.3 Extinguisher .16 Annex A (informative) Classification of the di
16、fferent parts of an extinguisher subject to internal pressure17 Annex B (normative) Pressures.18 Annex C (normative) Impact test .19 C.1 Resistance to impact by falling weight).19 Annex D (normative) Specification for plastics components (except hoses, pistols and nozzles) 20 D.1 General20 D.2 Requi
17、rements for plastics components subject to pressure20 Annex E (normative) Propellant gas cartridges volume less than 0,12 l 24 E.1 Refillable cartridge.24 E.2 Non-refillable cartridges .25 E.3 Marking .25 Annex F (informative) Propellant gas cartridges volume equal to or greater than 0,12 l but less
18、 than 0,5 l 26 F.1 Construction.26 F.2 Pressure test 26 F.3 Marking .26 BS EN 3-8:2006 (E)3 Annex G (normative) Overfill pressure test28 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 97/23/EC .29 Figure 1 Crushing test for long bodi
19、es10 Figure 2 Crushing test for short bodies 11 Table 1 Number of bodies to be sampled15 Table 2 Batch sampling plan following failure16 Table A.1 Classification.17 Figure B.1 Scheme of pressure 18 Table D.1 Drop height for hammer test22 Figure D.1 Example of thread profile .23 Table ZA.1 Correspond
20、ence between this European Standard and Directive 97/23/EC 29 BS EN 3-8:2006 (E)4 Foreword This document (EN 3-8:2006) has been prepared by Technical Committee CEN/TC 70 “Manual means of fire fighting equipment“, the secretariat of which is held by AFNOR. This European Standard shall be given the st
21、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2007, and conflicting national standards shall be withdrawn at the latest by June 2007. This document has been prepared under a mandate given to CEN by the European Commission and the Eur
22、opean Free Trade Association, and supports essential requirements of EU Directive 97/23/EC. For relationship with EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this document. This document is included in a series of European Standards planned to cover: a) classificati
23、on of fires (EN 2) b) mobile fire extinguishers (EN 1866) EN 3 consists of the following parts, under the general title “Portable fire extinguishers“ Part 11): Description, duration of operation, class A and B fire test Part 21): Tightness, dielectric test, tamping test, special provisions Part 3: C
24、onstruction, resistance to pressure, mechanical tests Part 41): Charges, minimum required fire Part 51): Specification and supplementary tests Part 6: Provisions for the attestation of conformity of portable fire extinguishers in accordance with EN 3 part 1 to part 5 Part 7: Characteristics, perform
25、ance requirements and test methods Part 8 : Additional requirements to EN 3-7 for the construction, resistance to pressure and mechanical tests for extinguishers with a maximum allowable pressure equal to or lower than 30 bar Part 92): Additional requirements to EN 3-7 for pressure resistance of CO2
26、extinguishers Part 10 : Provisions for evaluating the conformity of a portable fire extinguisher to EN 3 part 7 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,
27、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. 1)Withdrawn and replaced by EN 3-7. 2)In prep
28、aration. EN 3-10 updates and amends EN 3-6. On publication of EN 3-10 EN 3-6 will be withdrawn. BS EN 3-8:2006 (E)5 1 Scope This European Standard specifies the rules of design, type testing, fabrication and inspection control of portable fire extinguishers manufactured with metallic bodies as far a
29、s pressure risk is concerned. This part applies to portable fire extinguishers of which the maximum allowable pressure PS is lower than or equal to 30 bar and containing non-explosive, non-flammable, non-toxic and non-oxidising fluids. This European Standard also applies to the metallic gas cartridg
30、e of a volume less than 0,12 l (see Annex E) and gives guidance for sound engineering practice for metallic gas cartridges equal to or greater than 0,12 l and less than 0,5 l, see Annex F. This European Standard does not apply to carbon dioxide fire extinguishers. NOTE Annex A gives the classificati
31、on of the different parts forming the portable fire extinguisher. 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 docum
32、ent (including any amendments) applies. EN 3-7:2004, Portable fire extinguishers Part 7: Characteristics, performance requirements and test methods EN 287-1:2004, Qualification test of welders Fusion welding Part 1: Steels EN 1320:1996, Destructive tests on welds in metallic materials Fracture test
33、EN 1418:1997, Welding personnel Approval testing of welding operators for fusion welding and resistance weld setters for fully mechanized and automatic welding of metallic materials EN 10204:20043), Metallic products Types of inspection documents EN 13133:2000, Brazing Brazer approval EN 13134:2000,
34、 Brazing Procedure approval EN ISO 4892-2:1999, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps (ISO 4892-2:2006) EN ISO 9606-2:2004, Qualification test of welders Fusion welding Part 2: Aluminium and aluminium alloys (ISO 9606-2:2004) EN ISO 15614-1:2004, Specificat
35、ion and qualification of welding procedures for metallic materials Welding procedure test Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004) EN ISO 15614-2:2005, Specification and qualification of welding procedures for metallic materials Welding pro
36、cedure test - Part 2: Arc welding of aluminium and its alloys (ISO 15614-2:2005) EN ISO 15614-12:2004, Specification and qualification of welding procedures for metallic materials Welding procedure test Part 12: Spot, seam and projection welding (ISO 15614-12:2004) 3)This standard is also applicable
37、 to non-metallic products (see EN 10204:2004, 1.2). BS EN 3-8:2006 (E)6 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 3-7:2004 and the following apply. NOTE A scheme illustrating the different pressures is given in Annex B. 3.1 maximum pressure at m
38、aximum operating temperature, P (Tmax) (pressure experimentally measured) pressure measured in the extinguisher after stabilisation during at least 24 h at maximum operating temperature (Tmax) and for cartridge operated extinguishers, the maximum pressure is the maximum pressure recorded for 0,5 s d
39、uring a period of three minutes, excluding the first second after release of the propellant gas 3.2 maximum allowable pressure, PS (maximum declared pressure) maximum pressure for which the equipment is designed, as specified by the manufacturer and which is in any case greater than or equal to P (T
40、max) NOTE The value of PS for components should be equal to or greater than the value of PS for the extinguisher assembly. 3.3 bursting pressure Prmaximum pressure measured during a bursting test 3.4 portable fire extinguisher assembly assembly of parts to comprise the pressure retaining part of a f
41、ire extinguisher which can include a body, operating device, filling cap, closure and may include a propellant gas cartridge, hose and other components under pressure, if fitted. 3.5 maximum operating temperature Tmaxmaximum operating temperature declared by the manufacturer equal to or less than TS
42、max3.6 minimum operating temperature Tminminimum operating temperature declared by the manufacturer equal to or higher than TSmin3.7 propellant gas cartridge refillable or non-refillable pressure receptacle made of metal containing a propellant gas with a capacity less than 0,5 l NOTE In the ADR the
43、se are classified as cylinders (definition 1.2). 3.8 fittings pressure accessories which include operating devices, filling caps and hose assemblies 4 Symbols and abbreviations For the purposes of this document, the following symbols and abbreviations apply. PS Maximum allowable pressure in bar PT T
44、est pressure in bar BS EN 3-8:2006 (E)7 PrBursting pressure in bar D Nominal external diameter of the body, or the largest external value of the perpendicular section to the axis, in mm DN Diameter in mm for circular products submitted to pressure or the diameter in mm of the equivalent flow section
45、 for non circular parts DBDiameter of the mandrel used during the crushing test in mm P (Tmax) Pressure at maximum operating temperature, in bar TmaxMaximum operating temperature declared by the manufacturer, in C TminMinimum operating temperature declared by the manufacturer, in C S Minimum wall th
46、ickness in mm TSminMinimum allowable temperature in C TSmaxMaximum allowable temperature in C 5 Materials 5.1 Materials for bodies An inspection certificate based on specific inspection in accordance with EN 10204 is required. 5.2 Materials for the bodies of operating devices and filling caps The bo
47、dy material (metallic or plastics) of any operating device and filling cap shall be compatible with other products and shall have an appropriate certificate such as EN 10204:2004 test report 2.2. 5.3 Materials for other components The materials used for other parts of extinguishers shall be suitable
48、 for the intended use and be compatible with the materials used for the pressure parts. In the case of plastic materials, components shall comply with the requirements of Annex D. 6 Experimental design method and prototype testing 6.1 General The minimum allowable temperature range declared of the b
49、ody TSminto TSmaxshall be 30 C to + 60 C. A wider temperature range may be declared by the manufacturer. Where this is the case, the temperatures and pressures used in this European Standard shall be amended to reflect this new temperature range. BS EN 3-8:2006 (E)8 6.2 Experimental design 6.2.1 Bodies Minimum wall thickness 6.2.1.1 General In no case shall the value of the wall thickness be below that given by the equations below. 6.2.1.2 Metallic bodies except austenitic
