1.1 本实施规程涵盖了在实施规程中描述的执行无损质量控制试验的程序 D4437/D4437M 和实践 D4545 用于使用气泡发射或真空室方法评估所有类型土工膜接缝的连续性。 1.2 本实践中描述的技术旨在用于土工膜接缝、补片和缺陷。 1.3 以SI单位或英寸-磅单位表示的值应单独视为标准值。每个系统中陈述的值不一定完全等同；因此，为确保符合标准，每个系统应独立使用，两个系统的数值不得合并使用。 1.4 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。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法规限制的适用性。 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》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 本规范是一项无损评估，旨在用于土工膜工厂或现场接缝期间的质量控制目的。 5.2 该实践也可用于评估土工膜板穿透材料整个厚度的孔。测试实践的局限性在于，它可能不适用于不平坦或弯曲的表面、厚接缝、角落接缝和薄的可拉伸土工膜。

1.1 This practice covers procedures to perform nondestructive quality control testing described in Practice D4437/D4437M and Practice D4545 for evaluating the continuity of all types of geomembrane seams using the bubble emission or vacuum chamber method. 1.2 The technique described in this practice is intended for use on geomembrane seams, patches, and defects. 1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 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 ====== 5.1 This practice is a nondestructive evaluation intended to be used for quality control purposes during factory or field seaming of geomembranes. 5.2 This practice may also be used to evaluate geomembrane panels for holes that penetrate the entire thickness of material. Limitations on the test practice are that it may not be suitable for uneven or curved surfaces, thick seams, seams in corners, and thin extensible geomembranes.