1.1 本标准给出了测试程序，以确定暴露在气态碳氢化合物环境中导致的橡胶或弹性材料或两者样品尺寸的变化。试样的尺寸应便于从成型部件配置（如垫片和密封件）中进行制备。经双方同意，可使用模制试样。在配方试验气体中调节前后进行尺寸测量。 1.2 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 1.3 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。 1.4 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 本试验方法提供的信息有助于制造质量控制、技术服务和研究目的；并符合各种材料规范的要求。 5.2 该方法适用于所有弹性体或橡胶材料。

1.1 This standard gives the testing procedure to determine the change in dimensions of specimens of rubber or elastomeric materials, or both, resulting from exposure to gaseous hydrocarbon environments. The size of the specimens is such to facilitate preparation from as molded component configurations such as gaskets and seals. Where agreed to by both parties molded specimens may be used. Dimensional measurements are made prior to and after conditioning in a formulated test gas. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.3 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. 1.4 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 The information provided by this test method is useful for manufacturing quality control, technical service, and research purposes; and is required by various material specifications. 5.2 This method is suitable for all elastomer or rubber materials.