1.1 本试验方法提供了一种快速测定管道修补材料相对密封能力的方法，这些修补材料用于密封钢管管道涂层中的漏涂。本试验方法旨在使用小直径管道上的管道涂层试样，以代表用于埋地或水下服务的涂层，并且涂层的目的是在钢管与其环境之间提供电气屏障。 1.2 本试验方法不用于评估重叠的贴片材料。 1.3 以国际单位制表示的值应被视为标准。括号中给出的值仅供参考。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。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，并确定监管限制的适用性。 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 管道涂层中的漏涂可以通过用合适的管道包裹带进行圆周包裹来修复。 然而，这种技术并不总是可行的，可能需要修补。修补材料的有效性取决于其与原始管道涂层的粘附力，以实现密封。 3.2 已经发现，这种加速测试的结果产生了可用于选择修补材料的比较数据。警告用户不要使用这种方法进行绝对材料性能表征。 3.3 该程序通过将贴片暴露在小直径管道上的严重曲率半径下，提供了一种加速方法。在高导电电解质存在的情况下，试样也暴露在应力电压下。

1.1 This test method provides an accelerated means of determining the relative sealing abilities of pipeline patching materials that are used to seal holidays in pipeline coatings on steel pipe. This test method is intended for utilization of specimens of pipeline coatings on small-diameter pipe, for representing coatings used for buried or submerged service, and where the purpose of the coating is to provide an electrical barrier between the steel pipe and its environment. 1.2 This test method is not intended for evaluating patch materials that are overlapped upon themselves. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 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 ====== 3.1 Holidays in pipeline coatings may be repaired by circumferential wrapping with a suitable pipe wrap tape. However, this technique is not always practicable and patching may be required. The effectiveness of a patch material depends upon its adhesion to the original pipeline coating to effect sealing. 3.2 The results of this accelerated test have been found to yield comparative data useful for the selection of patching materials. The user is cautioned against the use of this method for absolute material properties characterization. 3.3 This procedure provides an accelerated method by exposing the patch to a severe radius of curvature on small-diameter pipe. The specimen is also exposed to a stress voltage in the presence of a highly conductive electrolyte.