1.1 本试验方法包括使用加压水囊装置测定带衬垫塑料地下管道接头的防水渗透性。 1.2 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。 1.3 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。 1.4 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====== 3.1 地下电气和通信管道应不透水，以防止损坏导线和公用设施拱顶。本试验方法中描述的膀胱试验可用于通过指示接头系统是否能防止水渗透来鉴定潜在的衬垫导管系统。 3.2 该试验方法可用于鉴定使用柔性弹性密封的塑料地下导管的接头。然而，不应假设通过该测试方法的联合系统能够在错误安装或滥用或两者兼有的情况下进行密封。 3.3 本试验方法涵盖了以下所有衬垫导管类型:包埋（EB）（不包括EB20）、直埋（DB）、电信、有线电视、Schedule 40导管和Schedule 80导管。 所涵盖的商品尺寸为2英寸。标称尺寸及更大。（参见UL 651；NEMA TC-2、TC-6和TC 8；以及规范 F512 .) 3.4 本试验方法还包括拟与中所述导管类型一起使用的配件 3.3 并且使用柔性弹性密封件。

1.1 This test method covers the determination of the water infiltration resistance of gasketed plastic underground conduit joints using a pressurized water bladder apparatus. 1.2 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. 1.3 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 ====== 3.1 Underground electrical and communication conduit should be impervious to groundwater in order to prevent damage to conductors and utility vaults. The bladder test described in this test method may be used to qualify potential gasketed conduit systems by indicating whether the joint system will prevent water infiltration. 3.2 This test method can be used to qualify joints for plastic underground conduits using flexible elastomeric seals. However, it should not be assumed that a joint system that passes this test method will be able to seal under cases of misinstallation or abuse, or both. 3.3 This test method covers all of the following gasketed conduit types: encased burial (EB) excluding EB20, direct burial (DB), telecommunications, cable television, and Schedule 40 conduit and Schedule 80 conduit. Trade sizes covered are 2-in. nominal size and larger. (See UL 651; NEMA TC-2, TC-6, and TC 8; and Specification F512 .) 3.4 This test method also covers fittings that are intended for use with the conduit types described in 3.3 and which use flexible elastomeric seals.