1.1 这些试验方法描述了由头盔和面罩组成的抗弹道头部防护装置的试验。试验方法涉及背面变形、抗穿透性和弹道极限。预计买方或其他用户将在头盔的规范或性能标准中参考这些测试方法，以满足用户的特定需求。 注1: ISO/IEC 17025规定了执行测试或校准或两者的能力的一般要求。它包括使用标准方法、非标准方法和实验室开发方法进行的测试和校准。 1.2 这些试验方法不涉及眼睛保护，但连接到头盔上的防弹面罩除外。 1.3 这些试验方法未规定性能标准或试验结果的用途。 1.4 这些试验方法包括弹道试验前对试验项目进行调节的程序。 1.5 在这些试验方法中，“其他标准和规范”和“除非另有规定”是指需要使用这些试验方法的文件（例如，军用标准、采购规范）。买方和其他用户对“其他标准和规范”负责，并规定取代这些试验方法的任何要求。 1.5.1 其他标准和规范将规定和描述将使用的弹道测试威胁。 1.6 单位- 国际单位制（公制）或美国惯用单位（英寸-磅）中规定的数值应单独视为标准值。每个系统中所述的值可能不完全相同。 这两个单元都被引用，以便于在国际上获取材料并最小化制造成本。使用任一系统进行的试验保持了试验方法的重复性和再现性，结果具有可比性。 1.7 如果这些测试方法与用户提供的文档之间存在差异，则以用户提供的文件为准。 1.8 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ===意义和用途====== 5.1 U、 美国国防部和美国司法部的标准和规范可能需要这些测试方法来评估抗弹道头盔和面罩的穿透阻力和背面变形。 5.2 私营部门和政府实验室、制造商、研究和开发组织以及其他评估头盔和面罩的抗弹道性能或进行新材料研究和开发的机构可以使用这些测试方法。 5.3 这些试验方法将被其他标准和规范引用。

1.1 These test methods describe the tests for ballistic-resistant head protection which consists of helmets and face shields. Test methods address backface deformation, resistance to penetration, and ballistic limit. It is anticipated that these test methods will be referenced by purchasers or other users in specifications or performance standards for helmets in order to meet the user’s specific needs. Note 1: ISO/IEC 17025 specifies the general requirements for the competence to carry out tests or calibrations, or both. It covers testing and calibration performed using standard methods, non-standard methods, and laboratory-developed methods. 1.2 These test methods do not address eye protection other than ballistic-resistant face shields that are attached to the helmet. 1.3 These test methods do not specify performance criteria or usages of the test results. 1.4 These test methods include procedures for conditioning of test items prior to ballistic testing. 1.5 In these test methods, “other standards and specifications” and “unless specified elsewhere” refer to documents (for example, military standards, purchase specifications) that require the use of these test methods. Purchasers and other users are responsible for the “other standards and specifications,” and for specifying any requirements that supersede those of these test methods. 1.5.1 Other standards and specifications will specify and describe the ballistic test threats to be used. 1.6 Units— Values stated in either the International System of Units (metric) or U.S. Customary units (inch-pound) are to be regarded separately as standard. The values stated in each system may not be exact equivalents. Both units are referenced to facilitate acquisition of materials internationally and minimize fabrication costs. Tests conducted using either system maintain repeatability and reproducibility of the test method and results are comparable. 1.7 If there is a discrepancy between these test methods and a user supplied document, the user supplied document takes precedence. 1.8 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. 1.9 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 ====== 5.1 U.S. Department of Defense and U.S. Department of Justice standards and specifications may require these test methods for assessing the penetration resistance and backface deformation of ballistic-resistant helmets and face shields. 5.2 These test methods may be used by private-sector and government laboratories, manufacturers, research and development organizations, and others assessing the ballistic resistance of helmets and face shields or performing research and development of new materials. 5.3 It is intended that these test methods will be referenced by other standards and specifications.