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首页> 外文会议>International Pipeline Conferenc >DEMONSTRATION OF AN INNOVATIVE TECHNOLOGY FOR THE DETECTION OF SMALL LEAKS FROM THE UNDERGROUND PIPELINES IN AIRPORT HYDRANT FUEL DISTRIBUTION SYSTEMS
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DEMONSTRATION OF AN INNOVATIVE TECHNOLOGY FOR THE DETECTION OF SMALL LEAKS FROM THE UNDERGROUND PIPELINES IN AIRPORT HYDRANT FUEL DISTRIBUTION SYSTEMS

机译：用于检测机场消防栓燃料分配系统地下管道小泄漏的创新技术的演示

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Vista Research, Inc., has developed an innovative technology for the detection of small leaks in underground pipelines that are part of the aviation fueling systems found at commercial airports and military airfields. These include hydrant fuel distribution lines, which are typically 10 in. or more in diameter and up to several miles long, as well as the smaller fuel-farm pipelines associated with aboveground or bulk underground storage tanks that supply fuel to the hydrant lines. The fuel farm lines are typically 8 to 10 in. in diameter and are generally less than 1,000 ft long. On the hydrant lines, the new technology is implemented as a computer-controlled system called the Fully Automatic Line Tester, or FALT. On the underground lines associated with fuel-farm tanks, it is implemented as a system called the MAnual Line Tester (MALT). The MALT{sup}(plus) is a MALT that is equipped an electronic data acquisition system. The MALT, MALT{sup}(plus) and FALT can be used as portable systems and transported from line to line for quarterly, semi-annual or annual tightness testing, or they can be permanently installed for periodic monitoring on a daily, weekly or monthly basis. A tightness test can be completed in approximately 2 h, and a test for monitoring purposes in approximately 1 h. They are attached to the line at a single location by means of a valve; any location along the line is suitable. No additional instrumentation or sensors have to be installed. These systems make a direct measurement, at the operating pressure of the line, of the rate of change in liquid volume that is due to a leak. The MALT, MALT{sup}(plus) and FALT achieve high performance because they compensate for thermal expansion and contraction of the product as part of the test protocol. To achieve a similar level of performance with conventional pressure or volumetric leak detection systems would require a pre-test waiting period of 24 to 48 h after the cessation of normal operations to allow the thermal changes to subside. The FALT was demonstrated at the Miami International Airport, on a 1.86-mile-long underground hydrant line containing 45,750 gal of Jet-A fuel. Testing was conducted between midnight and 5:00 A.M. each day, after fueling operations had been terminated for the night. During each of two demonstration tests conducted, personnel simulated a leak in the line by with drawing a small, measured volume of fuel. Agreement between the amount withdrawn and the rate of flow measured by the FALT was within 0.07 gal/h during the first test and within 0.31 gal/h during the second. The MALT and the MALT{sup}(plus) were demonstrated at the Naval Air Station (NAS) North Island, Coronado, as part of the Naval Environmental Leadership Program (NELP). Over a three-day period, nine leak detection tests were conducted on a 650-ft, 8-in.-diameter underground line containing 1,700 gal of diesel marine fuel. During three of the tests, leaks of 0.08,0.13, and 0.16 gal/h, respectively, were induced. Measurements of volume rate made by the MALT and MALT{sup}(plus) were in excellent agreement with the actual status of the line; for all nine tests, the one standard deviation uncertainty in the test results was 0.012 gal/h. The results of the demonstration indicated that the MALT and MALT{sup}(plus) could detect leaks as small as 0.1 gal/h accurately and reliably.
机译：Vista Research，Inc。制定了一种创新技术，用于检测地下管道中的小泄漏，是商业机场和军用机场的航空燃料系统的一部分。这些包括消防栓燃料分配线，其直径为10英寸，长达几英里长，以及与上面相关的较小的燃料 - 农用管道，或者散装地下储存罐供应到消防栓的燃料。燃料农场线通常为8至10英寸，直径通常小于1,000英尺长。在消防栓上，新技术实施为一个称为全自动线测试仪或FALT的计算机控制系统。在与燃料农用坦克相关的地下线上，它被实现为称为手动线测试仪（麦芽）的系统。麦芽{sup}（加）是一个配备电子数据采集系统的麦芽。麦芽，麦芽{sup}（加法）和falt可用作便携式系统，并从线路运输到季度，半年度或年度密封性测试，或者可以永久安装每天，每周或按月。密封性测试可以在大约2小时内完成，并且在大约1小时内进行监测目的的测试。它们通过阀门在单个位置连接到线路上;沿线的任何位置都是合适的。不需要安装其他仪器或传感器。这些系统在线的操作压力下进行直接测量，其液体体积的变化率是由于泄漏。麦芽，麦芽{sup}（加）和falt实现了高性能，因为它们可以补偿产品的热膨胀和收缩作为测试方案的一部分。为了实现类似的常规压力或体积泄漏检测系统的性能相似，在停止正常操作之后需要预测等待时间24至48小时，以允许热变化进行消退。 Falt在迈阿密国际机场展示了1.86英里长的地下消防栓，含有45,750型加热燃料。测试是在午夜和下午5点之间进行的。每天，在加油运营后终止了夜晚。在进行两次演示测试中，人员通过绘制少量测量的燃料来模拟线路中的泄漏。撤回的金额与法勒斯测量的流量之间的一致性在第一次测试期间的0.07 gal / h内，在第二个测试期间0.31加仑/小时内。麦芽和麦芽{Sup}（加号）在海军航空站（NAS）北岛（Coronado）是海军环境领导计划（NELP）的一部分。在为期三天的时间内，在含有1,700个Gal的柴油海洋燃料的650英尺，8英寸的地下线上进行了九个泄漏检测测试。在三次测试中，诱导泄漏0.08,0.13和0.16加仑/小时。麦芽和麦芽{Sup}（加）的体积率测量与线路的实际地位达成了很好的协议;对于所有九次测试，测试结果中的一个标准偏差不确定性为0.012 gal / h。演示结果表明，麦芽和麦芽{Sup}（加）可以准确可靠地检测为0.1加仑/小时的泄漏。

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