1、Designation:F204018An American National StandardStandard Specification forHelmets Used for Recreational Snow Sports1This standard is issued under the fixed designation F2040;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 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.Scope*1.1 This specification defines performance requirements forhelmets used in nonmotorized recreational snow sports(suchas skiin
3、g,snowboarding,and other alpine sports).This speci-fication is a performance standard and is not intended to restrictdesign.Although a helmet that meets this specification willhelp reduce the risk of some types of injuries to the head atslower speeds,the protection is limited.The user is responsible
4、for participating in the sport within his/her abilities and thenature of the snow conditions which may vary widely.Com-pliance with the common sense rules of the sports safety,including any applicable responsibility codes,is essential tohelp reduce the risk of personal injury.1.2 All testing and req
5、uirements of this specification shallbe in accordance with Test Methods F1446,except where notedherein.1.3 Partial utilization of this specification is prohibited.Anystatement of compliance with this specification shall be acertification that the product meets all of the requirements ofthe specifica
6、tion in its entirety.A product that fails to meet anyone of the requirements of this specification is considered tohave failed the standard and should not be sold with anyindication that it meets parts of the standard.1.4 This international standard was developed in accor-dance with internationally
7、recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2F1446 Test Methods f
8、or Equipment and Procedures Used inEvaluating the Performance Characteristics of ProtectiveHeadgear3.Headforms3.1 Headforms to be used in this specification are asspecified in the section on Test Headforms of Test MethodsF1446.The appropriate size headform shall be selected inaccordance with the sec
9、tion on Headform Size Selection ofTest Methods F1446 for the helmet to be tested.4.Anvils and Impact Velocities4.1 Anvils to be used for impact tests in this specificationare described as follows:4.1.1 Flat Anvil,as described in the section on Apparatus ofTest Methods F1446.4.1.2 Hemispherical Anvil
10、,as described in the section onApparatus of Test Methods F1446.4.1.3 Edge Anvil,constructed of solid steel in accordancewith Fig.1.4.2 Impact Velocities:4.2.1 Impacts upon the flat anvil shall achieve a velocity of6.2 m/s(corresponding to a theoretical drop height of 2.0 m).4.2.2 Impacts upon the he
11、mispherical anvil shall achieve avelocity of 4.8 m/s(corresponding to a theoretical drop heightof 1.2 m).4.2.3 Impacts upon the edge anvil shall achieve a velocity of4.5 m/s(corresponding to a theoretical drop height of 1.0 m).4.2.4 The impact velocity shall be measured during the last40 mm of free-
12、fall for each test and shall be within 3%of thevelocities specified in 4.2.1,4.2.2,and 4.2.3.5.Marking the Test Line5.1 The test line is shown in Fig.2 and shall be marked inaccordance with Test Methods F1446.6.Conditioning and Number of Samples6.1 Four sample helmets are required for each shell/lin
13、ersize combination.6.2 Conditioning of the samples to be tested is described inthe section on Conditioning Environment of Test MethodsF1446,but differs as follows:6.2.1 Low TemperatureThe low temperature shall be 22to 28C.1This specification is under the jurisdiction of ASTM Committee F08 on SportsE
14、quipment,Playing Surfaces,and Facilitiesand is the direct responsibility ofSubcommittee F08.53 on Headgear and Helmets.Current edition approved March 1,2018.Published March 2018.Originallyapproved in 2000.Last previous edition approved in 2011 as F2040 11.DOI:10.1520/F2040-18.2For referenced ASTM st
15、andards,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.*A Summary of Changes section appears at the end of this standardCopyright ASTM Internati
16、onal,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 6.2.2 High TemperatureThe high temperature shall be 32to 38C.7.Impact Sites7.1 Centers of impact can
