1、Designation:F189815An American National StandardStandard Specification forHelmets for Non-Motorized Wheeled Vehicles Used byInfants and Toddlers1This standard is issued under the fixed designation F1898;the number immediately following the designation indicates the year oforiginal adoption or,in the
2、 case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers performance requirements forhelmets manufactured for use by infants
3、 and toddlers aspassengers or operators of nonmotorized vehicles intended fortheir use.This specification recognizes the desirability oflightweight construction and ventilation;however,it is aperformance standard and is not intended to restrict design.1.2 All testing and requirements of this specifi
4、cation shallbe in accordance with Test Methods F1446 except as noted.1.3 Partial utilization of this standard is prohibited.Anystatement of compliance with this specification must be acertification that the product meets all of the requirements ofthis specification in their entirety.A product that f
5、ails to meetany one of the requirements of this specification is consideredto have failed this standard,and should not be sold with anyindication that it meets parts of this standard.1.4 Headgear that complies with this and other standardsmay proclaim uses as described in those standards as certifie
6、dby the manufacturer.1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 of this standard
7、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:2F1446 Test Methods for Equipment and Procedures Used inEvaluating the Performance Characteristics of ProtectiveHeadgear3.Labels and
8、Warnings3.1 In addition to the labeling requirements outlined in TestMethods F1446,the helmet shall have the words“For use byinfants and toddlers when riding non-motorized wheeled ve-hicles intended for their use”inscribed on one of the interiorpermanent labels.4.Marking the Test Line4.1 The test li
9、ne is shown in Fig.1 and shall be marked inaccordance with Test Methods F1446.5.Conditioning and Number of Samples5.1 Four helmets of each model and size are required fortesting.5.2 Conditioning of test samples is described in Test Meth-ods F1446.6.Headforms6.1 Headforms to be used in this specifica
10、tion are sizesA,C,and E according to Test Methods F1446,using the variablemass drop assembly configuration.The appropriate size head-form shall be selected in accordance with Test Methods F1446for the helmet to be tested.6.2 The headform center of gravity specified in AppendixX1 of Test Methods F144
11、6 will be allowed an additionaltolerance in the X-axis.The tolerance allows the location of thecenter of gravity to lie between-6.5 mm and 40 mm of thecenter of the ball socket(positive X is toward the monorailwhere applicable).7.Peripheral Vision Requirement7.1 The peripheral vision requirements sh
12、all be as specifiedin Test Methods F1446.8.Retention System Testing8.1 Retention system tests will be performed before impacttesting.The retention system shall be tested in accordance withTest Methods F1446 using a 7-kg 6 5%support assembly.1This specification is under the jurisdiction of ASTM Commi
13、ttee F08 on SportsEquipment,Playing Surfaces,and Facilities and is the direct responsibility ofSubcommittee F08.53 on Headgear and Helmets.Current edition approved April 1,2015.Published April 2015.Originallyapproved in 1998.Last previous edition approved in 2015 as F1898 08(2015).DOI:10.1520/F1898-
14、15.2For referenced ASTM standards,visit the 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,
15、West Conshohocken,PA 19428-2959.United States1 8.2 The stability(roll-off)test will be performed using a4-kg drop mass falling a distance of 0.6 m.The stability testwill be performed on the ambient helmet.8.3 The retention system shall remain intact and the helmetmust remain on the headform.8.4 The
16、dynamic strength test will be performed using a4-kg drop mass falling a distance of 0.6 m.The dynamicstrength test will be performed on the cold,wet,and hothelmets.8.5 The retention system shall remain intact without elon-gating more than 30 mm.9.Anvils and Impact Velocities9.1 Anvils to be used for impact tests in this specificationare the flat,hemispherical and curbstone anvils described inTest Methods F1446.9.2 The helmet shall be dropped onto the flat anvil toachieve an impact velocity of 6.
