A Risk Assessment Method of Urban Gas Pipeline Based on 'Five-Scale Method'

Abstract

The invention provides a risk assessment method of urban gas pipeline based on a 'five-scale method', belonging to the pipeline risk assessment category. On the basis of summarizing the main factors of pipeline leakage failure, the intermediate events and basic events of pipeline failure are established by fault tree method, and the main factors are further analyzed and identified. Then the fuzzycomprehensive evaluation method is used to evaluate the pipeline risk, in which the weight is calculated by AHP, the traditional 'nine-scale method' is improved to 'five-scale method', and the fuzzy comprehensive relationship matrix is improved, finally the risk level of urban gas pipeline accident is obtained. The improved fuzzy comprehensive rating method not only can fully reflect the objectivity of evaluation factors and evaluation process, but also is more practical and reliable than the traditional fault tree method and the single fuzzy comprehensive evaluation method, and solves the problem that the factors in the risk assessment are not objective enough, so as to achieve a more accurate risk assessment of urban gas pipelines.

Description

technical field [0001] The invention relates to the technical field of pipeline leakage, in particular to a risk assessment method for urban gas pipelines based on the "five-scale method". Background technique [0002] Urban gas pipelines are the main components of urban public infrastructure, and undertake the important task of transporting flammable and explosive gases. The safety of gas pipelines is a major issue related to social stability, economic development and public safety. It is an objective requirement to ensure sustainable economic development and is called the lifeline of cities. Pipeline risk assessment is to optimize the management and maintenance decisions of possible risk links in pipelines, reduce the probability of accidents or control the consequences of accidents to the greatest extent, in order to obtain maximum economic benefits while ensuring system safety. It is especially important to carry out risk assessment research on urban gas pipelines to en...

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Problems solved by technology

[0003] Although my country's pipeline industry has developed rapidly in the past 20 years, the risk assessment of urban gas pipelines in China is still not comprehensive and perfect. Quantitative description in the practical sense often only considers one factor when calculating the weight, ignoring the influence of other factors, resulting in many differences between the evaluation results and the actual situation, and the practical application is limited

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