ASTM F2032-2006 Standard Specification for Helmets Used for BMX Cycling《BMX赛车用头盔的标准规范》.pdf

1、Designation: F 2032 06An American National StandardStandard Specification forHelmets Used for BMX Cycling1This standard is issued under the fixed designation F 2032; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last

2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers performance requirements forhelmets used in BMX cycling. Studies have shown higher riskto the he

3、ad and face for this sport as compared to recreationalstreet riding; therefore, this specification requires impact pro-tection over a larger area of the head than Specification F 1447and the CPSC standard. This specification also providesperformance criteria for helmets equipped with chin bars.1.2 A

4、ll testing and requirements of this specification shallbe in accordance with Test Methods F 1446 except where notedherein.1.3 Partial utilization of this specification is prohibited. Anystatement of compliance with this specification shall be acertification that the headgear with faceguard meets all

5、 of therequirements of the specification in their entirety. A headgearwith faceguard that fails to meet any one of the requirements ofthis specification is considered to have failed the specification,and shall not be sold with any indication that it meets parts ofthe specification.1.4 Headgear desig

6、ned to comply with this and otherstandards may proclaim uses as certified by the manufacturer.1.5 The values stated in SI units are to be regarded asstandard.1.6 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user

7、of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2F 1446 Test Methods for Equipment and Procedures Usedin Evaluating the Performance Characteristics of ProtectiveHe

8、adgearF 1447 Specification for Helmets Used in RecreationalBicycling or Roller Skating3. Labels and Warnings3.1 Shall meet the requirements of Test Methods F 1446.3.2 Shall have the words “For BMX bicycle riding andracing.”4. Marking the Test Line4.1 The test line is shown in Fig. 1 and shall be mar

9、ked inaccordance with Test Methods F 1446.5. Conditioning and Number of Samples5.1 Shall be in accordance with Test Methods F 1446.5.2 The test requires a minimum of four samples of eachshell/liner combination, with a fifth sample required for fullface helmets with a chin bar.6. Retention System Tes

10、ting6.1 Retention system tests shall be performed before impacttesting.6.2 The ambient helmet shall be subjected to the Roll-OffTest of Test Methods F 1446 usinga4kgdrop mass from aheight of 0.6 m.6.3 The retention system shall remain intact and the helmetshall remain on the headform.6.4 The hot, co

11、ld, and wet helmets shall be subjected to theDynamic Strength Retention Test of Test Methods F 1446usinga4kgdrop mass from a height of 0.6 m.6.5 The retention system shall remain intact without elon-gating more than 30 mm.7. Impact Sites and Projections7.1 Impact sites are described in Test Methods

12、F 1446.7.2 ProjectionsAny unfaired projection extending morethan 7 mm from the helmets outer surface shall break away orcollapse when impacted with forces equivalent to those pro-duced by applicable impact-attenuation tests in Section 5.1This specification is under the jurisdiction of ASTM Committee

13、 F08 on SportsEquipment and Facilities and is the direct responsibility of Subcommittee F08.53 onHeadgear and Helmets.Current edition approved Nov. 1, 2006. Published December 2006. Originallyapproved in 2000. Last previous edition approved in 2000 as F 203200.2For referenced ASTM standards, visit t

14、he ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,

15、 United States.There shall be no fixture on the helmets inner surfaceprojecting more than 2 mm into the helmet interior exceptoccipital stabilizers and foam fit pads.8. Impacting Schedule8.1 All impacting shall be performed in accordance withTest Methods F 1446.8.2 Helmets shall be impacted with the

16、 anvils centered on orabove the test line described in Fig. 1.8.3 The test anvils can be oriented in any horizontal,centered position.8.4 For full face helmets with a chin bar, a fifth ambienthelmet shall be tested in accordance with Section 10 below.9. Impact Testing9.1 Retention system testing sha

17、ll be completed prior toimpact testing.9.2 The helmet can be impacted such that the theoreticalcenter of impact described in Test Methods F 1446 is anywhereon or above the test line with the curbstone anvil in anyhorizontal orientation.9.3 Anvils to be used are the flat, hemispherical, andcurbstone

18、anvils from Test Methods F 1446.9.4 The helmet shall be dropped onto the flat anvil toachieve an impact velocity of 6.2 m/s 6 3 % (corresponding toa theoretical drop height of 2.0 m).9.5 Hemispherical and curbstone anvil impacts shallachieve an impact velocity of 4.8 m/s 6 3 % (corresponding toa the

19、oretical drop height of 1.2 m).9.6 Each helmet shall be given two flat anvil impacts andone each hemispherical and curbstone anvil impact in anysequence.9.7 The theoretical center of each impact site shall beseparated from the theoretical center of other impact sites by aminimum of 120 mm.9.8 The pe

20、ak acceleration of each impact shall not exceed300 g.10. Chin Bar Rigidity Test10.1 The chin bar rigidity test applies to helmets with a chinbar only.HeadformSizeDimensionX L/2 Y R S T UA 24.0 88.0 89.7 38.0 23.0 142.0 84.0E 26.0 94.5 96.0 39.0 24.0 151.0 88.0J 27.5 101.0 102.5 41.0 25.0 160.0 92.0M

21、 29.0 106.0 107.0 41.0 27.0 166.0 96.0O 30.0 108.5 110.0 42.0 27.0 170.0 97.0FIG. 1 Marking the Test LineF203206210.2 If a chin bar is present, it shall be tested in accordancewith the procedures in Test Methods F 1446, Chin Bar RigidityTest, with an impact velocity of 2.8 m/s 6 5 % (correspondingto

22、 a theoretical drop height of 0.4 m), using a fifth ambientsample that has not been subjected to any other impact testing.11. Keywords11.1 bicycle; BMX; helmetsASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this stan

23、dard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be revie

24、wed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsibl

25、e technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).F2032063