Dynamic Quantitative Assessment of Pipeline Based on External Corrosion Rate

Through a large number of literature investigations, three methods commonly used in pipeline risk assessment (qualitative analysis, semi-quantitative analysis and quantitative analysis) were elaborated in detail, and corresponding models and methods were proposed for the evaluation of failures caused by external corrosion of pipelines. The results show that qualitative evaluation and semi-quantitative evaluation relied too much on historical database and engineering experience, which made pipeline risk assessment have obvious limitations and subjectivity. The quantitative evaluation only focuses on the risk caused by the "high risk" factor, and lacks the basic evaluation model and dynamic evaluation model, so that the quantitative evaluation of pipelines could not consider the potential economic loss of pipelines from the perspective of all-influence factors. With the advancement of pipeline integrity and pipeline big data technology, its full-factor quantitative risk assessment becomes possible, but it also puts forward higher requirements for data alignment, data screening, data processing and other related methods and models.