1.1 当使用负压（真空）试验方法证明安装材料的完整性和施工程序时，本试验方法涵盖了测试混凝土排水管道的程序。本试验方法包括使用衬垫接头对直径为100至900 mm的圆形混凝土污水管道进行试验。 注1: 建议本规范的用户，本试验方法中描述的方法也可以用作初步试验，以使制造商或安装商能够在交付或回填之前证明污水管的状况。最小测试时间见 表1 用于管道。测试单个管道的保持时间可能必须增加，以允许在将测试管道纳入连续管道时累积泄漏。 注2: 建议本试验方法的用户，本试验方法中提出的负压（真空）试验标准与一般使用的标准类似。 该试验和标准已广泛成功地用于测试较小直径的管道。通过目视检查和单独接头测试，可以更方便地接受较大的管道。 注3: 本标准中列出的测试时间和空气损失率基于已安装管道的成功测试。然而，由于空气和水具有不同的物理性质，当用水进行测试时，一些不符合现场空气测试的管道的重新测试是成功的。 1.2 本试验方法是试验方法的SI配套 C1214 . 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。 参见第节 6. 具体安全预防措施。 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 这不是例行测试。记录的数值仅适用于正在测试的下水道和测试时的下水道。

1.1 This test method covers procedures for testing concrete pipe sewerlines, when using the negative air pressure (vacuum) test method to demonstrate the integrity of the installed material and the construction procedures. This test method covers testing of 100 to 900-mm diameter circular concrete pipe sewerlines utilizing gasketed joints. Note 1: The user of this specification is advised that methods described in this test method may also be used as a preliminary test to enable the manufacturer or installer to demonstrate the condition of sewer pipe prior to delivery or backfill. Minimum test times presented in Table 1 are for pipelines. Holding times for testing an individual pipe may have to be increased to allow for the accumulation of leakage when the tested pipe are incorporated into a continuous pipeline. Note 2: The user of this test method is advised that the negative air pressure (vacuum) test criteria presented in this test method are similar to those in general use. The test and criteria have been used widely and successfully in testing smaller diameter pipe. Larger pipe will be accepted more conveniently by visual inspection and individual joint testing. Note 3: Test times tabulated and the rate of air loss in this standard are based on successful testing of installed pipelines. However, since air and water have different physical properties, retests of some pipelines not meeting field air tests have been successful when tested with water. 1.2 This test method is the SI companion to Test Method C1214 . 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. See Section 6 for specific safety precautions. 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 This is not a routine test. The values recorded are applicable only to the sewer being tested and at the time of testing.