城市天然气管网运行的可靠性分析

结合城市天然气管网的特点，对其运行的可靠性进行了分析，提出了城市管网可靠性评价的内容，给出了管网的分段原则，针对城市天然气管网运行的可靠性，将整个管网的管理分为初期、中期和末期三个阶段，并利用概率论的方法重点讨论了初期和中期管网的可靠性，给出了初期管网失效的故障树，提出了城市天然气管网可靠性运行的保证措施。

Analysis on the Safety and Reliability of City Gas Pipeline Network

According to the features of city gas pipeline network,this paper analyzes its running reliability,gives the assessment contents of reliability and proposes the classification principle of city gas pipeline network. The authors put all the process of pipeline management into three phases,that is,the beginning phase,the middle phase and the end phase. In addition,the probability method is applied to discuss the reliability for the beginning and the middle phase,and the failure tree of city gas pipeline network used in the beginning phase is presented. For the running safety of city gas pipeline network, the assuring measures are also brought forward.