1.1 本试验方法 2. 描述了在两种不同条件下测定材料在氧气中冲击敏感性的测试设备和技术: (1) 在环境压力下，液氧（LOX）或 (2) 在液氧或气态氧（GOX）中的压力控制条件下。它适用于在环境压力为68.9 MPa（0至10 000 psig）的LOX或GOX系统中使用的材料。本文所述的试验方法涉及纯氧环境下的试验；然而，在本文件中，也可以用其他富氧液体代替。 1.2 本试验方法提供了一种对指南中定义的非金属材料进行排序的方法 G63 用于液态和气态氧系统，可能不直接适用于确定最终用途配置中材料的灵敏度。本试验方法可用于提供批次间验收数据。本试验方法也可提供在富氧环境中评估金属材料的方法；然而，指南 G94 应咨询首选测试方法。 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 本标准并非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。 另请参见第节 9 . 1.5 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 本试验方法评估了材料在环境压力液氧、加压液氧和加压气态氧中对机械冲击的相对敏感性。 5.2 试样配置、厚度、制备或清洁度的任何变化或变化都可能导致冲击敏感性/反应阈值的显著变化。 5.3 中止试验的建议标准为: (1) 在最大能量水平98 J（72 ft•lbf）下测试的最多60个样品或更少样品中发生两个反应，或在任何其他能量水平下测试的最多20个样品中发生一个反应； (2) 在98-J（72 ft•lbf）能量水平下测试的20个样品没有反应；或 (3) 在最大能量水平下测试的60个样品中，最多有一个反应。

1.1 This test method 2 describes test equipment and techniques to determine the impact sensitivity of materials in oxygen under two different conditions: (1) in ambient pressure liquid oxygen (LOX) or (2) under pressure-controlled conditions in LOX or gaseous oxygen (GOX). It is applicable to materials for use in LOX or GOX systems at pressures from ambient to 68.9 MPa (0 to 10 000 psig). The test method described herein addresses testing with pure oxygen environments; however, other oxygen-enriched fluids may be substituted throughout this document. 1.2 This test method provides a means for ranking nonmetallic materials as defined in Guide G63 for use in liquid and gaseous oxygen systems and may not be directly applicable to the determination of the sensitivity of the materials in an end-use configuration. This test method may be used to provide batch-to batch acceptance data. This test method may provide a means for evaluating metallic materials in oxygen-enriched atmospheres also; however, Guide G94 should be consulted for preferred testing methods. 1.3 Values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 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. See also Section 9 . 1.5 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 This test method evaluates the relative sensitivity of materials to mechanical impact in ambient pressure liquid oxygen, pressurized liquid oxygen, and pressurized gaseous oxygen. 5.2 Any change or variation in test sample configuration, thickness, preparation, or cleanliness may cause a significant change in impact sensitivity/reaction threshold. 5.3 Suggested criteria for discontinuing the tests are: (1) occurrence of two reactions in a maximum of 60 samples or less tested at the maximum energy level of 98 J (72 ft•lbf) or one reaction in a maximum of 20 samples tested at any other energy level for a material that fails; (2) no reactions for 20 samples tested at the 98-J (72-ft•lbf) energy level; or (3) a maximum of one reaction in 60 samples tested at the maximum energy level.