Risk analysis of the city gas pipeline network based on the fault tree

In order to control and reduce city gas accidents, it´s very important to identify and analyze the relative risk factors existed in the city gas pipeline network comprehensively. Through the fault tree analysis, ¿gas leakage¿ was taken as the top event and four main reasons that led to gas leakage were found. According to above four reasons, the comprehensive fault trees were drew, which reflected the whole reasons to the top event ¿gas leakage¿. Finally, taking the third-party interference fault tree as the target to have a further analysis, and then a risk check list about third-party interference of city gas pipeline network was obtained, according to which, the prevention to gas pipeline network could be more effective.