1.1 本规范规定了美国公共安全官员用于保护头部免受手枪和步枪弹药伤害的头盔的最低性能要求和抗弹道试验方法。 1.1.1 本规范中的测试方法针对广泛可用的头盔设计进行了开发和验证。某些头盔设计可能需要额外的或与本规范中规定的测试不同的测试。 1.2 本规范涉及以下方面的弹道性能: 1.2.1 外壳、紧固件和弱点的头盔抗穿透性（RTP）； 1.2.2 头盔炮弹弹道极限（V50）；和 1.2.3 面罩RTP和变形。 1.3 本规范涵盖的头盔分为RTP弹道防护等级（见第节 8. ). 1.4 本规范涉及以下方面的非弹道性能: 1.4.1 头盔冲击衰减； 1.4.2 头盔外壳抗压性； 1.4.3 面罩抵抗钝性冲击、偏转和抛射物冲击； 1.4.4 面罩光学；和 1.4.5 保持系统强度。 1.5 背面变形（BFD）测量不作为符合本规范的要求。如果本规范的用户对BFD测量感兴趣，请参阅 附录X1 . 1.6 本规范版本中未涉及装甲贴花。 1.7 本规范适用于合规性测试、验证测试、认证测试或研发测试。 1.8 本规范分为以下几节: 部分 标题 1. 范围 2. 参考文件 3. 术语 4. 意义和用途 5. 测试威胁、设备和材料 6. 测试项目要求 7. 目视检查程序 8. 头盔抗穿透性（RTP）弹道防护等级和测试威胁 9 头盔外壳RTP和BFD的弹道性能要求 10 面罩的弹道性能要求 11 头盔外壳弹道极限（V50）的弹道性能要求 12 紧固件的弹道性能要求 13 弱点的弹道性能要求 14 头盔和面罩的非弹道性能要求 15 产品文档要求 16 产品标签和包装标签要求 17 测试报告 18 关键词 附件A1 ASTM头盔RTP弹道防护等级和相关测试威胁 附件A2 弹道测试总结 附件A3 非弹道试验总结 附录X1 可选背面变形测量验收标准和测试程序 1.9 单位-- 以国际单位制或英寸表示的数值- 磅单位应单独视为标准单位。每个系统中规定的值不一定是完全相等的；因此，为了确保符合标准，每个系统应独立使用，并且不得将两个系统的值组合使用。 1.10 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.11 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification specifies minimum performance requirements and test methods for the ballistic resistance of helmets used by U.S. public safety officers and intended to protect the head against handgun and rifle ammunition. 1.1.1 The test methods within this specification were developed and validated for broadly available helmet designs. Some helmet designs may require additional or different testing than that specified in this specification. 1.2 This specification addresses ballistic performance in terms of: 1.2.1 Helmet resistance to penetration (RTP) of shell, fasteners, and weak points; 1.2.2 Helmet shell ballistic limit (V50); and 1.2.3 Face shield RTP and deformation. 1.3 Helmets covered by this specification are classified into RTP ballistic protection levels (see Section 8 ). 1.4 This specification addresses non-ballistic performance in terms of: 1.4.1 Helmet impact attenuation; 1.4.2 Helmet shell compression resistance; 1.4.3 Face shield resistance to blunt impact, deflection, and projectile impact; 1.4.4 Face shield optics; and 1.4.5 Retention system strength. 1.5 Backface deformation (BFD) measurement is not addressed as a requirement for compliance with this specification. If the user of this specification is interested in BFD measurement, see Appendix X1 . 1.6 Armor appliques are not addressed within this version of the specification. 1.7 This specification is applicable for compliance testing, verification testing, certification testing, or research and development testing. 1.8 This specification is divided into the following sections: Section Title 1 Scope 2 Referenced Documents 3 Terminology 4 Significance and Use 5 Test Threats, Equipment, and Materials 6 Test Item Requirements 7 Procedure for Visual Examination 8 Helmet Resistance to Penetration (RTP) Ballistic Protection Levels and Test Threats 9 Ballistic Performance Requirements for Helmet Shell RTP and BFD 10 Ballistic Performance Requirements for Face Shields 11 Ballistic Performance Requirements for Helmet Shell Ballistic Limit (V50) 12 Ballistic Performance Requirements for Fasteners 13 Ballistic Performance Requirements for Weak Points 14 Non-ballistic Performance Requirements for Helmets and Face Shields 15 Product Documentation Requirements 16 Product Label and Package Label Requirements 17 Test Report 18 Keywords Annex A1 ASTM Helmet RTP Ballistic Protection Levels and Associated Test Threats Annex A2 Ballistic Testing Summary Annex A3 Non-ballistic Testing Summary Appendix X1 Optional Backface Deformation Measurement Acceptance Criteria and Test Procedure 1.9 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.10 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.11 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.