1.1 本规程描述了适用于聚乙烯鞍形熔合接头评定的试验标准。供应商或用户可根据运输部（DOT）《联邦法规》（CFR）第49篇第192.283部分的要求进行这些试验，以鉴定鞍式熔合接头。最终用户可自行决定，用户也可根据DOT CFR 49第192.285部分进行这些试验以鉴定制造鞍式熔焊接头的人员。 1.2 所述抗冲击试验为非标准试验。根据DOT规定，这不是唯一可用于鉴定鞍座熔合接头的试验。 1.3 以英寸-磅单位表示的数值应视为标准。括号中给出的数值是对国际单位制的数学转换，仅供参考，不被视为标准。 1.4 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建立适当的安全、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====== 3.1 本规程中描述的试验旨在提供满足DOT CFR第49篇第192.283和192.285部分要求的方法。 3.2 持续压力试验旨在满足第192.283部分的爆破试验要求。 3.3 抗冲击试验旨在满足第192.283部分的力要求，如下所示: 3.3.1 “. . . 对于拟用于横向管道连接的程序，根据（连接）程序，对由直角连接的管段制成的试样接头施加横向管道上的力，直到试样发生故障。 如果故障发生在接合区域之外，则（接合）程序符合使用条件。”

1.1 This practice describes test criteria suitable for qualification of polyethylene saddle-fused joints. These tests may be conducted by suppliers or users to qualify saddle-fused joints in accordance with the requirements found in the Department of Transportation (DOT) Code of Federal Regulations (CFR) Title 49, Part 192.283. At the discretion of the end user, these tests may also be conducted by users to qualify personnel making saddle fusion joints per DOT CFR 49, Part 192.285. 1.2 The impact resistance test described is a nonstandard test. This is not the only test that may be used to qualify saddle fusion joints per DOT regulations. 1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversion 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 ====== 3.1 The tests described in this practice are intended to present a method of satisfying the requirements of DOT CFR Title 49, Parts 192.283 and 192.285. 3.2 The sustained pressure test is intended to meet the burst test requirements of Part 192.283. 3.3 The impact resistance test is intended to meet the force requirements of Part 192.283 as follows: 3.3.1 “. . . For procedures intended for lateral pipe connections, subject a specimen joint made from pipe sections joined at right angles according to the (joining) procedure to a force on the lateral pipe until failure occurs in the specimen. If failure initiates outside the joint area, the (joining) procedure qualifies for use.”