1.1 本标准提供了评估军事、执法和惩教人员佩戴的头盔抗压性的试验方法。这些测试方法适用于多种类型的头盔（即高切、中切、全切）。 1.2 包括三种压缩试验方法:( 1. )从上到下( 2. )侧面到侧面，以及( 3. )从前到后。 1.2.1 提供了两个选项，分别用于顶部到底部压缩测试、侧面到侧面压缩测试和前后压缩测试。 1.3 预计供应商、认证机构、采购商或其他用户将参考本标准，以满足其特定需求。这些用户将在其他标准和规范中指定适用的测试方法和调节程序，并将指定任何性能类别或级别。 1.4 单位-- 以国际单位制或英寸磅单位表示的数值应单独视为标准。 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。 1.5 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。 1.6 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。 ====意义和用途====== 4.1 本标准旨在提供可靠且可重复的压缩试验方法，用于评估执法、矫正和军事应用中使用的头盔。 4.2 预计认证机构、购买者或其他用户将参考本标准，以满足其特定需求。这些用户将指定应用哪些测试方法，并指定任何性能类别或级别。

1.1 This standard provides test methods for assessing compression resistance of helmets worn by military, law enforcement, and corrections personnel. These test methods are applicable for many styles of helmet (that is, high-cut, mid-cut, full-cut). 1.2 Three compression test methods are included: ( 1 ) top-to-bottom, ( 2 ) side-to-side, and ( 3 ) front-to-back. 1.2.1 Two options each are provided for the top-to-bottom compression test, the side-to-side compression test, and the front-to-back compression test. 1.3 It is anticipated that this standard will be referenced by suppliers, certifiers, purchasers, or other users to meet their specific needs. Those users will specify, in other standards and specifications, which test methods and conditioning procedures are applicable and will specify any performance categories or levels. 1.4 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. 1.5 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. 1.6 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. ====== Significance And Use ====== 4.1 The purpose of this standard is to provide reliable and repeatable compression test methods for the evaluation of helmets used in law enforcement, corrections, and military applications. 4.2 It is anticipated that this standard will be referenced by certifiers, purchasers, or other users in order to meet their specific needs. Those users will specify which test methods apply and will specify any performance categories or levels.