Oil/Gas Pipeline Typical Third-Party Endanger Reliability Research Considering Failure Transfer/Model Correlation

Risk assessment is one of the important technology to ensure the safety of the long-distance oil/gas pipeline, and calculating the failure probability is the important part of the risk assessment, then the veracity of the failure probability impact the rationality and applicability of the result of the risk assessment. Minimal cut set system of fault tree for the third party damage of oil and gas pipelines is calculated based on search algorithms of Petri nets minimal cut sets, and laid the foundation for fault tree analysis system considering the correlation. The analysis model of failure probability for basic event parallel system of minimum cut set based on the proposed Hamath QiuEr accumulate operator is proposed, meanwhile, sorting combination method of the basic event attributes and classification is established for solving failure probability of many basic events. In addition, correlation analysis of failure mode under the action of random disturbance sources is discussed; failure correlation analysis model of minimum cut set is established based on the proposed MGL for solving failure probability of failure mode series system comprised by the minimum cut sets.