AS NZS 2512 2-2006 Methods of testing protective helmets - General requirements for the conditioning and preparation of test specimens and laboratory conditions《保护头盔测试方法 方法2 试样和实验室.pdf

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1、 1 AS/NZS 2512.2:2006 COPYRIGHT Australian/New Zealand StandardTMMethods of testing protective helmets Method 2: General requirements for the conditioning and preparation of test specimens and laboratory conditionsPREFACE This Standard was prepared by the Joint Standards Australia/Standards New Zeal

2、and Committee CS-097, Testing of Helmets and Visors, to supersede AS/NZS 2512.2:1998. Method of testing protective helmets, Part 2: General requirements for the conditioning and preparation of test specimens and laboratory conditions. This Standard is republished without technical alteration. METHOD

3、 1 SCOPE This Standard sets out the conditioning procedures for protective helmets that are to be tested, the ways in which the helmets are prepared for testing, and the laboratory conditions for testing. 2 REFERENCED DOCUMENTS The following documents are referred to in this Standard: AS/NZS 2512 Me

4、thods of testing protective helmets 2512.1 Method 1:Definitions and headforms ISO 5272 Toluene for industrial useSpecifications 3 DEFINITIONS For the purpose of this Standard, the definitions given in AS/NZS 2512.1 apply. 4 CONDITIONING Prior to testing, helmets shall be conditioned as follows: (a)

5、Ambient temperature At least one helmet shall be conditioned by being exposed to a temperature of 18C to 25C for 4 h to 30 h. (b) Low temperature At least one helmet shall be conditioned by being exposed to a temperature of 10 2C for 4 h to 30 h in a controlled environmental temperature apparatus. A

6、S/NZS2512.2:2006Accessed by ISONET - CHINA STATE BUREAU OF TECHNICAL SUPERVIS on 27 Feb 2008AS/NZS 2512.2:2006 2 COPYRIGHT (c) High temperature At least one helmet shall be conditioned by being exposed to a temperature of 50 2C for 4 h to 30 h in a circulating air oven. (d) Water immersion At least

7、one helmet shall be immersed in water at a temperature of 18C to 25C for 4 h to 30 h. (e) Solvent Where specified, test helmets shall be treated as follows: (i) The entire exterior surface of the helmet shall be treated with approximately 25 mL of the conditioning solvent, being a mixture of 50 perc

8、ent toluene (any grade in accordance with ISO 5272) and 50 percent iso-octane. (ii) The solvent shall be applied initially to the exterior surface of the helmet in the areas within 50 mm of the retention system fixing points for not less than 5 s each, and then to the remainder of the exterior surfa

9、ce for not less than 10 s. (iii) At least 30 min shall elapse before further conditioning and testing. NOTES: 1 As the solvent components have high and different evaporation rates, it is necessary to store the solvent in a non-permeable container and to use the solvent before evaporation losses chan

10、ge the proportions of the components. 2 Application may be by means of a cotton cloth approximately 150 mm square, which has been soaked in the solvent. 3 Appropriate precautions need to be taken in handling the solvent, by avoiding inhalation, contact with the skin or eyes, and use near any ignitio

11、n source. If during testing the time out of the conditioning environments specified in Items (a) to (d) for a test helmet exceeds 5 min, the helmet shall be returned to the conditioning environment for a minimum of 3 min for each 1 min out of the conditioning environment or 4 h, whichever is the les

12、ser, before testing is resumed. 5 DETERMINATION OF THE TEST LINE The test line of the helmet shall be determined as follows: (a) Place the complete helmet to be tested on a reference headform of the largest size which it fits when the headband is adjusted to its largest setting, or if no headband is

13、 provided, the largest size corresponding to the interior circumference of the helmet at the AA line. Ensure that the reference headform is firmly seated with the basic and reference planes horizontal. (b) Apply a static force of 45.0 +0, 0.5 N to the apex of the helmet. Centre the helmet laterally

14、and seat it firmly on the reference headform according to its helmet positioning index. The helmet positioning index is determined by positioning the helmet on the headform in the manner in which it is intended to be worn. The helmet should not be tilted artificially forward or rearward on the headf

15、orm in order to cover the test line, when a user would not normally wear the helmet in such a position. (c) Maintaining the above force and position, draw the test line as defined in AS/NZS 2512.1 on the outer surface of the helmet. 6 POSITIONING FOR TESTING The helmet shall be placed on a test head

16、form of the same size designation as the reference headform used for determining the test line, in a position that conforms to its helmet positioning index. The helmet shall be secured so that it does not shift position prior to testing. Accessed by ISONET - CHINA STATE BUREAU OF TECHNICAL SUPERVIS

17、on 27 Feb 20083 AS/NZS 2512.2:2006 COPYRIGHT The retention system shall be positioned so that it does not interfere with free fall, impact or penetration. 7 LABORATORY CONDITIONS The tests shall be conducted at an ambient temperature of 18C to 25C. Accessed by ISONET - CHINA STATE BUREAU OF TECHNICA

18、L SUPERVIS on 27 Feb 2008AS/NZS 2512.2:2006 4 This Australian/New Zealand Standard was prepared by Joint Technical Committee CS-097, Testing of Helmets and Visors. It was approved on behalf of the Council of Standards Australia on 19 May 2006 and on behalf of the Council of Standards New Zealand on

19、2 June 2006 and published on 13 June 2006. The following are represented on Committee CS-097: Brain Foundation Certification Interests (Australia) Consumers Federation of Australia IEA National Panel Biomechanics of Injury Land Transport Safety Authority New Zealand National Association of Testing A

20、uthorities Australia National Injury Surveillance New Zealand Employers and Manufacturers Association New Zealand Helmet Testing Interests Roads and Traffic Authority of NSW TestSafe Australia The University of New South Wales Keeping Standards up-to-date Standards are living documents which reflect

21、 progress in science, technology and systems. To maintain their currency, all Standards are periodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Stan

22、dard, which should include any amendments which may have been published since the Standard was purchased. Detailed information about joint Australian/New Zealand Standards can be found by visiting the Standards Web Shop at .au or Standards New Zealand web site at www.standards.co.nz and looking up t

23、he relevant Standard in the on-line catalogue. Alternatively, both organizations publish an annual printed Catalogue with full details of all current Standards. For more frequent listings or notification of revisions, amendments and withdrawals, Standards Australia and Standards New Zealand offer a

24、number of update options. For information about these services, users should contact their respective national Standards organization. We also welcome suggestions for the improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguiti

25、es. Please address your comments to the Chief Executive of either Standards Australia International or Standards New Zealand at the address shown on the back cover. Originated as AS 2512.21981. Previous edition AS/NZS 2512.2:1998. Third edition 2006. This Standard was issued in draft form for commen

26、t as DR 06104. COPYRIGHT Standards Australia/Standards New Zealand All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Jointly published by Standards

27、Australia Limited, GPO Box 476, Sydney, NSW 2001 and Standards New Zealand, Private Bag 2439, Wellington 6020 ISBN 0 7337 7495 4 Printed in Australia Accessed by ISONET - CHINA STATE BUREAU OF TECHNICAL SUPERVIS on 27 Feb 2008This page has been left intentionally blank.Accessed by ISONET - CHINA STATE BUREAU OF TECHNICAL SUPERVIS on 27 Feb 2008