1.1 本规范描述了使用电子扫描系统定位水平和垂直表面上的膜破裂以定位暴露的屋顶和防水膜中潜在泄漏的标准程序。 1.2 本实践满足了对用于测试和验证膜完整性的扫描方法和程序的详细技术描述的需求。 1.3 这种做法并不旨在取代目视或其他检查方法。当指定时，它将与其他屋顶检查方法一起使用。 1.4 本实践要求校准所使用的检测和定位设备、程序和测量参数，以满足既定的最低泄漏检测灵敏度。必须使用制造商的程序定期验证检测灵敏度校准，以确保结果的最大置信度。1.5 扫描测量可用于安装在屋顶、广场甲板、游泳池、水景、有盖水库以及其他屋顶和防水应用上的膜。 1.6 本规范适用于由电绝缘材料制成的膜，并用于某些中等导电膜（见试验方法 D4496 ). 1.7 本实施例描述了使用电导定位膜破裂的扫描方法和设备，旨在与制造商关于设备正确操作和使用的说明一起使用。 1.8 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。1.9 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 在膜安装期间和安装后未能纠正膜破裂会导致膜过早失效和结构损坏。根本原因可能包括设计缺陷、膜系统的错误应用、产品故障、材料不相容以及其他行业的损坏。在安装覆盖层之前，必须对覆盖层下包含屋顶或防水膜的屋顶设计进行破坏测试。4.2 本规范描述了一种低压（NFPA 70定义的小于50 V）双扫描方法，使用电子泄漏检测来定位屋顶和防水膜中的缺口。所描述的方法包括旨在提供屋顶和防水膜质量保证的一部分的测试程序。 4.3 本实践中描述的方法也可用于现有屋顶和防水膜的法医测试；然而，适用稍后描述的特定限制。

1.1 This practice describes standard procedures for using an electronic scanning system to locate membrane breaches on both horizontal and vertical surfaces to locate potential leaks in exposed roofing and waterproofing membranes. 1.2 This practice addresses the need for a detailed technical description of a scanning method and procedures that are used to test and verify the integrity of membranes. 1.3 This practice is not intended to replace visual or other methods of inspection. It is to be used in conjunction with other methods of roof inspection when specified. 1.4 This practice requires that the detection and location equipment, procedures, and survey parameters used are calibrated to meet established minimum leak detection sensitivity. The detection sensitivity calibration must be verified on a regular basis using the manufacturer’s procedures to ensure maximum confidence in the results. 1.5 Scanning surveys can be used on membranes installed on roofs, plaza decks, pools, water features, covered reservoirs, and other roofing and waterproofing applications. 1.6 This practice is applicable for membranes made of electrically insulating materials and is used on certain moderately conductive membranes (see Test Method D4496 ). 1.7 This practice provides a description of the scanning method and equipment for locating membrane breaches using electric conductance and is intended to be used in conjunction with the manufacturer’s instructions for the proper operation and use of the equipment. 1.8 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. 1.9 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 The failure to correct membrane breaches during and after its installation can cause premature failure of the membrane and damage to the structure. Root causes may include design deficiencies, faulty application of the membrane system, product failure, material incompatibility, and damage by other trades. Roof designs incorporating a roofing or waterproofing membrane under overburden must be tested for breaches before overburden is installed. 4.2 This practice describes a low-voltage (less than 50 V as defined by NFPA 70), dual sweep scanning method using electronic leak detection to locate breaches in roofing and waterproofing membranes. The method described includes testing procedures designed to provide a part of the quality assurance of roofing and waterproofing membranes. 4.3 The methods described in this practice may also be used for forensic testing of existing roofing and waterproofing membranes; however, specific limitations apply that are described later.