地下管道泄漏检测与定位技术的寻测测试结果

[中文适用范围]： 本研究审查了用于加压地下管道的泄漏检测和定位方法。审查筛选了针对直径6至18英寸、长度250英尺至约2英里的地下管道的候选方法。此类地下管道常见于机场、炼油厂和燃料终端。对看似有前景的方法进行了进一步审查，并选择了四种技术进行现场演示测试（范围查找测试）。这四种技术是恒压体积测试、压力衰减测试、化学示踪剂测试和声发射测试。范围查找测试在一个运行设施上进行，使用了不同体积的管道段。这些方法在紧密管道、人为泄漏管道以及一条存在运行泄漏的管道上进行了测试。估算了每种方法可检测到的泄漏的大致尺寸。能够定位泄漏的方法被用来识别运行泄漏，并通过挖掘和修复进行了确认。 [外文原描述]： This study reviewed the current leak detection and leak location methods for pressurized underground piping commonly found at airports, refineries, and fuel terminals. Four methods for testing underground pipes of 6 to 18 inches in diameter and 250 feet to 2 miles in length were selected for field demonstration. These technologies were constant-pressure volumetric testing, pressure-decay testing, chemical tracer testing, and acoustic emission testing. No single leak detection system was found to work in all situations; site-specific conditions may affect any method, and combinations of methods may provide the most effective approach.