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首页> 外文会议>International pipeline conference >A MODEL FOR SIZING HIGH CONSEQUENCE AREAS ASSOCIATED WITH NATURAL GAS PIPELINES
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A MODEL FOR SIZING HIGH CONSEQUENCE AREAS ASSOCIATED WITH NATURAL GAS PIPELINES

机译：用天然气管道施加高后果区域的模型

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The failure of a high-pressure natural gas pipeline can lead to various outcomes, some of which can pose a significant threat to people and property in the immediate vicinity of the failure location. The dominant hazard is thermal radiation from a sustained jet or trench fire. An estimate of the ground area affected by a credible worst-case failure event can be obtained from a model that characterizes the heat intensity associated with rupture failure of the pipe where the escaping gas is assumed to feed a sustained trench fire that ignites very soon after line failure. An equation has been developed that relates the diameter and operating pressure of a pipeline to the size of the area likely to experience high consequences in the event of an ignited rupture failure. The model upon which the hazard area equation is based consists of three parts: 1) a fire model that relates the rate of gas release to the heat intensity of the fire as a function of distance from the fire source; 2) an effective release rate model that provides a representative steady-state approximation to the actual transient release rate; and 3) a heat intensity threshold that establishes the sustained heat intensity level above which the effects on people and property are consistent with the adopted definition of a so-called High Consequence Area. The validity of the proposed model is established by a comparison between the predicted extent of the damage area and the actual extent of damage for significant gas pipeline failure incidents reported in the public domain.
机译：高压天然气管道的失败可能导致各种结果，其中一些可能在故障位置附近对人和财产构成重大威胁。主导危险是来自持续喷射或沟槽的热辐射。由可信最坏情况失效事件影响的地面可以从表征与管道破裂故障相关的模型获得的地面，其中假设逃逸气体饲喂持续的沟槽火灾，以便在后面点燃线路故障。已经开发了一种等式，其将管道的直径和操作压力涉及在可能在点燃破裂故障发生时体验高后果的区域的大小。危险区域方程基于三部分的模型由三部分组成：1）一种火模型，其将气体释放速率与火距离的距离与火源距离相关; 2）一种有效的释放速率模型，提供了与实际瞬态释放率的代表性稳态近似; 3）建立高度热强度的热强阈值，其上述持续的热强度水平与所谓的高后果区域的采用定义一致。所提出的模型的有效性是通过在损伤区域的预测范围和公共领域报告的重大气体管道故障事件的实际损害之间的比较建立的。

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