Application of DAGF method in risk assessment of urban gas pipeline

At present, my country's gas pipelines are densely laid in cities, most of which run through urban streets, and the transport medium is flammable and explosive. Once leakage occurs, it may cause a chain reaction, resulting in accidents such as combustion, explosion and poisoning. Therefore, in order to ensure the safe operation of pipelines, it is of great significance to carry out risk assessment research on them. Through the combination of qualitative and quantitative methods, the analysis of the factors affecting the safety of urban buried gas pipelines, the research on the evaluation model of urban gas pipelines, the verification of pipeline safety evaluation examples and the design of the model system are carried out, using the DAGF method to improve the accuracy of pipeline risk assessment.