1.1 本试验方法用于测定与热塑性管道和配件材料接触的物质的化学兼容性。 1.2 本试验方法不旨在评估用于连接塑料管道的溶剂水泥或粘合剂的适用性。 1.3 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 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 这些程序可用于评估预计与塑料管道接触的化学品或材料是否会导致热塑性材料中的环境应力开裂。该测试结果确定了失效时间与工程应力的关系。该程序也可用于应力破裂回归分析，其中需要各种应力水平。该方法很容易适用于在液体中进行浸泡试验或在73℃以外的温度下进行试验 °F（23 °C）。

1.1 This test method is used for determining chemical compatibility of substances in contact with thermoplastic pipe and fittings materials. 1.2 This test method is not intended to evaluate the suitability of solvent cements or adhesives used to join plastic piping. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 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 These procedures can be used to evaluate chemicals or materials expected to come in contact with plastic piping relative to causing environmental stress-cracking in thermoplastic materials. This testing results in determining time-to-failure versus engineering stress. This procedure can also be used in stress-rupture regression analysis, where a variety of stress levels are needed. The methodology can be readily adapted to conducting immersion tests in liquids or testing temperatures other than 73 °F (23 °C).