1.1 本试验方法包括检测玻璃钢设备玻璃涂层中的不连续性，这种不连续性会由于容器的化学成分对金属基底的侵蚀而导致早期失效。适用于( 1. )提供设计用于相对温和、低温腐蚀性服务的玻璃钢设备的制造和检验测试，以及( 2. )在腐蚀性更严重的环境中使用的类似设备的现场测试。 注1: 试验方法中描述了后一种设备的制造试验方法 C537 。 1.2 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 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====== 4.1 该测试方法旨在检测玻璃钢设备玻璃涂层中存在的不连续性，同时保持足够低的电压，以免导致涂层破裂。 该测试适用于设备加工过程中的制造检查，也适用于现场使用，以发现在设备严重损坏之前可以“堵塞”或修复的现有缺陷。作为阳性检测的一种手段，它适用于工艺研究、质量控制或规范。

1.1 This test method covers the detection of discontinuities in the glass coating of glassed steel equipment where such discontinuities would result in early failure due to the attack of the chemical contents of the vessel on the metal substrate. It is applicable to ( 1 ) provide a manufacturing and inspection test of glassed-steel equipment designed for relatively mild, low-temperature corrosive service, and ( 2 ) the field testing of similar equipment used in more severely corrosive environment. Note 1: A manufacturing test method for the latter type of equipment is described in Test Method C537 . 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 ====== 4.1 This test method is designed to detect existing discontinuities in the glass coating of glassed steel equipment while maintaining a voltage low enough as to be unlikely to cause breakdown of the coating. The test is adaptable for manufacturing inspection in the processing of equipment and for field use to find existing defects which can be “plugged” or repaired before serious damage is done to the equipment. As a means of positive detection, it is applicable to process studies, quality control, or specification.