1.1 本试验方法用于测定高密度聚乙烯（HDPE）树脂或波纹管在加速环境中恒定韧带应力下减缓裂纹扩展的敏感性。本试验方法仅适用于熔体指数（<0.4至0.15）和密度范围（>0.947）有限的HDPE g/cm 3. 至0.955 g/cm 3. ). 此测试方法可能适用于其他材料，但目前无法获得其他材料的数据。 1.2 该测试方法测量给定试样在恒定、规定的韧带应力水平下的失效时间。 1.3 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.4 定义符合术语 F412 ，缩写词符合术语 D1600 ，除非另有规定。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 此测试方法并不旨在解释生成的数据。 4.2 本试验方法旨在比较有限组HDPE树脂的耐慢速裂纹扩展（SCG）性能。 4.3 此测试方法可用于原始HDPE树脂压缩- 模制成斑块或在挤出的HDPE波纹管上，该波纹管被切碎并压缩模制成斑块（参见 7.1.1 详细信息）。

1.1 This test method is used to determine the susceptibility of high-density polyethylene (HDPE) resins or corrugated pipe to slow-crack-growth under a constant ligament-stress in an accelerating environment. This test method is intended to apply only to HDPE of a limited melt index (<0.4 to 0.15) and density range (>0.947 g/cm 3 to 0.955 g/cm 3 ). This test method may be applicable for other materials, but data are not available for other materials at this time. 1.2 This test method measures the failure time associated with a given test specimen at a constant, specified, ligament-stress level. 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 Definitions are in accordance with Terminology F412 , and abbreviations are in accordance with Terminology D1600 , unless otherwise specified. 1.5 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. 1.6 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 test method does not purport to interpret the data generated. 4.2 This test method is intended to compare slow-crack-growth (SCG) resistance for a limited set of HDPE resins. 4.3 This test method may be used on virgin HDPE resin compression-molded into a plaque or on extruded HDPE corrugated pipe that is chopped and compression-molded into a plaque (see 7.1.1 for details).