Hefei City Gas Pipeline Network System Risk Assessment And Prevention Research

With the development of human socity,urban gas transmission snd distribution systems have gradually become an important urban infrastructure component of the security of system operation is especially important.According to Hefei, the actual situation of gas pipeline networks, emerging from the study of city gas pipeline network risk assessment techniques, for reducing the occurrence of the accident to ensure that state and the masses of the property has important economic significance and social benefits.In this paper,China's city gas transmission and distribution system production status of a full investigation based on the combination of Binhu District of Hefei gas pipeline networks system,the actual situation of the dangers inherent in the system to identify harmful factors.From the dangerous and hazardous substances, operating procedures and equipment and places three aspects of gas pipeline network system for risk analysis in advance of the qualitative assessment of each unit to identify the dangers inherent in hazardous factors. By using fault-tree evaluation method Binhu district of Hefei city gas Pipeline analysis, fault tree minimal cut pipes to be set is 176, the pipeline is the primary risk of rupture. Use of pipeline risk assessment model - Expert-scoring pairs of city gas pipeline safety evaluation. By analyzing the five tube scripts results of the evaluation unit to arrive at all levels, the risk of pipe network level, in which high-pressure gas pipeline for the lowest risk of pipe sections. According to fuzzy mathematics theory, Hefei Binhu district gas pipeline network system security fuzzy comprehensive evaluation system, by determining the factor set to determine the rating level set to determine the weight factor set to determine the factor evaluation matrix, fuzzy comprehensive evaluation process, the final was a unit of risk analysis, safety evaluation results.According to risk identification and qualitative and quantitative results of the evaluation for Binhu district of Hefei existence of gas pipeline network system fires, explosions, leaks and other failures put forward the corresponding risk prevention and emergency treatment measures to effectively improve the production of city gas transmission and distribution system operation and management level, the incident may result in personal safety and property damage reduced to a minimum.