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首页> 外文会议>Biennial International Pipeline Conference(IPC 2004) vol.3; 20041004-08; Calgary(CA) >HIGH SENSITIVITY EXTERNAL LEAK DETECTION FOR LIQUID FUEL PIPELINES
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HIGH SENSITIVITY EXTERNAL LEAK DETECTION FOR LIQUID FUEL PIPELINES

机译：液体燃料管道的高灵敏度外部泄漏检测

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摘要

Pipeline risk mitigation in high consequence areas can be facilitated through the use of a high sensitivity external leak detection (HSELD) system. Such systems have been implemented for both off-site and on-site pipeline applications, including the Longhorn Pipeline (Texas) and the Madrid Barajas International Airport (Spain). We define high-sensitivity external leak detection as a leak detection system that will continuously and automatically detect very small amounts of liquid fuels and is physically independent of pipeline pumping operations. In addition, such systems monitor their own integrity on a continuous basis, without requiring periodic recalibration or operator interaction. The HSELD system we describe incorporates a distributed sensor cable, installed in a slotted PVC conduit which is run in close proximity to the pipeline. Many pipeline leaks start out as very small cracks or holes resulting from corrosion and wear. In their initial stages, such leaks go undetected by standard leak detection methods, but over time large volumes of liquid fuel may leak into the environment. In high consequence areas, such as above aquifers and other environmentally sensitive areas, the leak may go undetected until traces show up in water samples. The critical characteristic of an effective HSELD is its ability to detect and accurately locate very small volumes of liquid fuels, so that these small leaks can be identified, cleaned up and repaired before environmental damage is done.
机译：通过使用高灵敏度的外部泄漏检测（HSELD）系统，可以降低高风险区域的管道风险。此类系统已针对异地和现场管道应用（包括Longhorn管道（德克萨斯州）和马德里巴拉哈斯国际机场（西班牙））实施。我们将高灵敏度的外部泄漏检测定义为一种泄漏检测系统，该系统将连续自动检测非常少量的液体燃料，并且在物理上与管道泵送操作无关。另外，这样的系统连续地监视其自身的完整性，而无需定期重新校准或操作员交互。我们描述的HSELD系统包含一条分布式传感器电缆，该电缆安装在开槽的PVC导管中，该导管紧靠管线。许多管道泄漏开始时都是由于腐蚀和磨损导致的很小的裂缝或孔洞。在最初阶段，这种泄漏不会通过标准的泄漏检测方法检测到，但是随着时间的流逝，大量的液体燃料可能会泄漏到环境中。在后果严重的地区，如蓄水层以上和其他对环境敏感的地区，在水样中出现痕迹之前，可能无法发现泄漏。有效的HSELD的关键特性是其能够检测并精确定位非常少量的液体燃料的能力，因此可以在环境破坏完成之前识别，清理和修复这些小泄漏。

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