1.1 本指南提供的照片说明了与委员会C24关注的范围和领域一致的密封和密封剂行为。 1.2 如果可用，更好地说明这些术语或说明C24委员会定义的其他术语的照片将包含在本标准的未来版本中。供审议的照片可使用以下表格提交给委员会: 附录X1 . 1.3 对本标准具有管辖权的委员会不知道其他组织发布的任何类似标准。 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。 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====== 4.1 本指南旨在用于评估使用中出现的密封剂状况，以及故障分析中的其他诊断技术。 这些标准参考照片已通过ASTM的协商一致投票程序选择和批准，以说明C24委员会定义的术语。 4.2 此处所示的并非所有术语都是失效，本指南中未讨论影响密封剂的其他失效机制。本指南旨在作为密封剂性能评估中使用的众多信息来源之一。

1.1 This guide provides photographs that illustrate seal and sealant behavior consistent with the scope and areas of interest of Committee C24. 1.2 When available, photographs that better illustrate these terms, or that illustrate additional terms defined by Committee C24, will be included in future editions of this standard. Photographs for consideration may be submitted to the committee using the form in Appendix X1 . 1.3 The committee with jurisdiction over this standard is not aware of any comparable standards published by other organizations. 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. 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 ====== 4.1 This guide is intended to be used in evaluating sealant conditions that occur in service, along with other diagnostic techniques in failure analysis. These standard reference photographs have been selected and approved through ASTM's consensus balloting process to illustrate terms defined by Committee C24. 4.2 Not all of the terms illustrated here are failures, and there are other failure mechanisms that affect sealants that are not discussed in this guide. This guide is intended to be one of a number of sources of information used in the evaluation of sealant behavior.