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Experimental values for adjusting an automatic control valve in gas pipeline transportation

机译：燃气管道运输中调节自动调节阀的实验值

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When a natural gas pipeline ruptures, the adjacent automatic line control valves (ALCVs) should close quickly to prevent leakage or explosion. The differential pressure set point (DPS) at each valve location is the main criteria for value setting in ALCV action. If the DPS is not properly adjusted, the ALCV may mistakenly close or it may not take any action at proper time. This study focused on the DPS values prediction for setting ALCV installed on a gas pipeline with 1mm orifice diameter. The effect of characteristic parameters such as pipeline operational pressure (POP) and pipeline pressure drop rate (ROD) due to rupture or major leak was experimentally investigated on DPS. Twenty-five different conditions with double set of typical mentioned characteristic parameters were chosen. For each condition, the differential pressure (DP) was measured over 180 seconds by analyzing the experimental values. Therefore, 25 maximum DP values (DPSs) were obtained. The DPS increases by increase in ROD or decreasing POP parameters. Because of using nitrogen gas instead of natural gas due to safety reasons, the DPS results can be practically applied by adding a safety factor of 15%. The diagram of DPS with respect to ROD and non-dimensional DPS (DOP) versus non-dimensional ROD (RTP) was provided for different POPs.
机译：当天然气管道破裂时，相邻的自动管线控制阀（ALCV）应迅速关闭以防止泄漏或爆炸。每个阀位置的压差设定点（DPS）是ALCV动作中设定值的主要标准。如果未正确调整DPS，则ALCV可能会错误关闭或在适当的时间不采取任何措施。这项研究集中在DPS值预测上，以设定安装在口径1mm的燃气管道上的ALCV。在DPS上通过实验研究了诸如破裂或大泄漏引起的管道运行压力（POP）和管道压力下降率（ROD）等特征参数的影响。选择了25种不同的条件，并使用了两组典型的典型特征参数。对于每种条件，通过分析实验值在180秒内测量压差（DP）。因此，获得了25个最大DP值（DPS）。 DPS随ROD的增加或POP参数的减少而增加。由于安全原因，由于使用氮气代替天然气，因此通过增加15％的安全系数可以实际应用DPS结果。针对不同的POP，提供了关于ROD和无量纲DPS（DOP）与无量纲ROD（RTP）的DPS图表。

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