Urban Buried Gas Pipeline Vulnerability Assessment

Gas is one of the raw materials. It has flammable, explosive, toxic and other dangerous properties. As the transportation medium, Municipal natural gas pipeline is the key link to the natural gas safety. Therefore, to appraise and know the safe condition of the urban various regions gas pipeline is vital significant.As one of the risk investigation's important tools, the vulnerable appraisal research has been promoted to the unprecedented important position. This article namely draws support from this appraisal method, carries on the appraisal to the city gas line's synthesis safe condition.Firstly, synthesizing the domestic and foreign various domains about the vulnerable research existing achievement, grasping the central content of the vulnerable appraisal combining the goal of the article, defines the connotation of bury gas pipeline's vulnerability in city; Secondly, according to the definition which assigns, analyzing the influential indicators of vulnerable pipeline, establishes the municipal natural gas pipeline's vulnerability assessment index system; Thirdly, at the foundation of used vulnerability assessment method and gas pipeline value method, selecting analytic hierarchy process and the fuzzy quality synthetic evaluation method as the appraisal method, and establishing the model of vulnerable appraisal; Finally, selects Beijing three link as a case,according to expert determined to define the targets frail degree, to help with the fuzzy evaluation model, through the frailty comparison, determinate the appraisal object frail rank.The article's goal is to compare pipeline relatively frail degree manifestation. So in the procedure of setting up the indicator system and appraisal model, has not covered all risk indicator, but increasing the dealing with ability factor which the former risk assessment did not consider. Thorough the development, the target system frail degree will give better guidance to the safety management.