BS EN 13087-4-2012 Protective helmets Test methods Retention system effectiveness《防护帽 试验方法 系统效能保持》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 13087-4:2012Protective helmets TestmethodsPart 4: Retention system effectivenessBS EN 13087-4:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implemen

2、tation of EN 13087-4:2012.It supersedes BS EN 13087-4:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PH/6, Head protection.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not p

3、urport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 68426 5ICS 13.340.20Compliance with a British Standard cannot confer immunity fromlegal obligati

4、ons.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 29 February 2012.Amendments issued since publicationDate Text affectedBS EN 13087-4:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13087-4 February 2012 ICS 13.340.20 Supersedes EN

5、13087-4:2000English Version Protective helmets - Test methods - Part 4: Retention system effectiveness Casques de protection - Mthodes dessai - Partie 4: Efficacit du systme de rtention Schutzhelme - Prfverfahren - Teil 4: Wirksamkeit des Haltesystems This European Standard was approved by CEN on 17

6、 December 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 lists and bibliographical references concerning such national standards may

7、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 under the responsibility of a CEN member into its own language and notified to

8、 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, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe

9、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN

10、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13087-4:2012: EBS EN 13087-4:2012EN 13087-4:2012 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Prerequisites 55 Method 55.1 Ge

11、neral 55.2 Principle 65.3 Apparatus .65.3.1 General 65.3.2 Test headforms 65.3.3 Rigid base .65.3.4 Falling mass and guidance system .65.3.5 Means to measure impact speed .65.4 Procedure .75.5 Report .7Annex A (normative) Test results Uncertainty of measurement .9Annex B (informative) Significant te

12、chnical changes between this European Standard and EN 13087-4:2000 10Annex ZA (informative) Relationship between this European Standard and the Essential requirements of EU Directive 89/686/EEC Personal Protective Equipment . 11BS EN 13087-4:2012EN 13087-4:2012 (E) 3 Foreword This document (EN 13087

13、-4:2012) has been prepared by Technical Committee CEN/TC 158 “Head protection”, the secretariat of which is held by BSI. 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 August 2012, and conflictin

14、g national standards shall be withdrawn at the latest by August 2012. 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 su

15、persedes EN 13087-4:2000. 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 par

16、t of this document. Annex B provides details of significant technical changes between this European Standard and the previous edition. This European Standard consists of the following ten parts: Part 1 : Conditions and conditioning; Part 2 : Shock absorption; Part 3 : Resistance to penetration; Part

17、 4 : Retention system effectiveness; Part 5 : Retention system strength; Part 6 : Field of vision; Part 7 : Flame resistance; Part 8 : Electrical properties; Part 9 : Mechanical rigidity1; Part 10 : Resistance to radiant heat. According to the CEN/CENELEC Internal Regulations, the national standards

18、 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, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Polan

19、d, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1To be published. BS EN 13087-4:2012EN 13087-4:2012 (E) 4 Introduction This European Standard is intended as a supplement to the specific product standards for protective helmets (helmet standards).

20、Test methods may be applicable to complete helmets or parts thereof, and may be referenced in the other helmet standards. Performance requirements are given in the appropriate helmet standard, as are such prerequisites as the number of samples, preconditioning, preparation of samples for the tests,

21、sequence and duration of testing and assessment of test results. If deviations from the test method given in this standard are necessary, these deviations will be specified in the appropriate helmet standard. BS EN 13087-4:2012EN 13087-4:2012 (E) 5 1 Scope This European Standard specifies methods of

22、 test for protective helmets. The purpose of these tests is to enable assessment of the performance of the helmet as specified in the appropriate helmet standard. This European Standard specifies the method of test for retention system effectiveness. 2 Normative references The following referenced d

23、ocuments 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 (including any amendments) applies. EN 960:2006, Headforms for use in the testing of protective helmets EN 1308

24、7-1, Protective helmets Test methods Part 1: Conditions and conditioning 3 Terms and definitions For the purposes of this document, the terms and definitions given in this standard may be found in the appropriate helmet standard. 4 Prerequisites In order to implement this part of EN 13087, at least

25、the following parameters shall be specified in the appropriate helmet standard: a) performance requirements; b) number of samples; c) preparation of samples; d) sequence of conditioning; e) sequence of tests; f) direction of application of the force; g) sizes of the headforms; h) impact energy, incl

26、uding tolerance, of the falling mass; i) fitting instructions. 5 Method 5.1 General Testing shall be performed in the ambient conditions specified in EN 13087-1. BS EN 13087-4:2012EN 13087-4:2012 (E) 6 This test may be performed so that the pull is exerted from the front and/or from the rear. The me

27、thod to be used is specified in the helmet standard. 5.2 Principle The helmet is mounted on a test headform and then subjected to a sudden force applied at the front and/or the rear edge of the helmet, tending to rotate it on the headform. The extent of any movement is observed. 5.3 Apparatus 5.3.1

28、General The apparatus shall include: a series of headforms; a rigid base to secure the headforms; a falling mass and associated guidance system; a means to measure impact speed; a steel wire. The arrangement of the apparatus is shown in Figure 1. 5.3.2 Test headforms The headforms shall be in accord

29、ance with EN 960:2006, 2.2 and 3. The sizes to be used are specified in the helmet standard, but shall be selected from size designations 495, 515, 535, 555, 575, 585, 605 and 625 (equivalent to codes A, C, E, G, J, K, M and O, respectively, EN 960:1994). 5.3.3 Rigid base The rigid base shall be suc

30、h as to support the headform so that its central vertical axis is indeed vertical and so that during the test it does not move. 5.3.4 Falling mass and guidance system A guidance system shall be provided to enable the falling mass of (10 0,1) kg to be dropped in guided fall on to the metal end stop.

31、The guidance system shall have a total mass of (3 0,1) kg. The falling mass shall be connected to the helmet by means of a twisted steel wire of minimum diameter 3 mm running over a pulley of diameter (100 2) mm and a hook of nominal width 25 mm. The guidance system shall be such as to ensure that t

32、he falling mass falls with an impact speed of not less than 95 % of that which would theoretically obtain for a free fall. 5.3.5 Means to measure impact speed Means shall be provided to measure the speed of the falling mass at a distance of not more than 60 mm prior to impact, to within an accuracy

33、of 1 %. The impact speed shall be measured during the commissioning of the apparatus. It need not be done for each test. BS EN 13087-4:2012EN 13087-4:2012 (E) 7 5.4 Procedure Fit the helmet in accordance with the fitting instructions to the smallest available headform appropriate to the helmet size.

34、 Adjust the retention system as tight as possible, by hand. If the appropriate helmet standard requires the measurement of rotation, mark a horizontal datum line on the outside of the helmet. Attach the hook over the front or rear edge of the helmet at the centre and arrange the steel wire to pass o

35、ver the longitudinal vertical median plane of the helmeted headform. If the appropriate helmet standard requires the measurement of rotation, then measure to the nearest degree the angle that the helmet may have initially rotated. Arrange for the falling mass to fall through a drop height correspond

36、ing to the required impact energy specified in the appropriate helmet standard and release the mass. Observe whether the helmet comes off the headform completely. If it does not, and if required in the appropriate helmet standard, measure to the nearest degree the angle that the helmet has rotated,

37、this being the angle between datum line drawn on the helmet and the horizontal (final rotation). 5.5 Report Report if the helmet came off the headform completely or, alternatively, the angles of the initial (if required) and final rotations. BS EN 13087-4:2012EN 13087-4:2012 (E) 8 Dimensions in mill

38、imetres Key 1 steel wire 8 central vertical axis 2 rigid base 9 reference plane 3 pulley 10 hook 4 frame 11 drop height 5 falling mass 12 headform 6 guiding system 13 metal end stop 7 datum line on the helmet Figure 1 Arrangement of test apparatus BS EN 13087-4:2012EN 13087-4:2012 (E) 9 Annex A (nor

39、mative) Test results Uncertainty of measurement For each of the required measurements performed in accordance with this standard, a corresponding estimate of the uncertainty of measurement shall be evaluated. This estimate of uncertainty shall be applied and stated when reporting test results, in or

40、der to enable the user of the test report to assess the reliability of the data. BS EN 13087-4:2012EN 13087-4:2012 (E) 10 Annex B (informative) Significant technical changes between this European Standard and EN 13087-4:2000 The significant changes with respect to the first edition of EN 13087-4 are

41、 as listed below. Table B.1 Significant changes between this European Standard and EN 13087-4:2000 Clause/paragraph/table/figure ChangeClause 2 The normative references in Clause 2 and in the text have been updated. EN 960 has been dated throughout the text. 5.3.2 Update of cross references. Sizes h

42、ave been extended to size designations and between brackets EN 960:1994 equivalent code letters. Annex ZA Has been updated. NOTE The technical changes referred include the significant technical changes from the EN revised but is not an exhaustive list of all modifications from the previous version.

43、BS EN 13087-4:2012EN 13087-4:2012 (E) 11 Annex ZA (informative) Relationship between this European Standard and the Essential requirements of EU Directive 89/686/EEC Personal Protective Equipment This European Standard has been prepared under a mandate given to CEN by the European Commission and the

44、 European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 89/686/EEC Personal Protective Equipment. Once this standard is cited in the Official Journal of the European Union under that Directive and has been implemented as a national st

45、andard in at least one Member State, compliance with the clauses of this standard, together with the relevant requirements given in the product standard, confers, within the limits of the scope of this standard, a presumption of conformity with the Essential Requirements 1.2.1 of Annex II of that Di

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