Quantitative Analysis of combined effect of multiple factors on CO2 internal corrosion in gas gathering pipeline

There are a number of factors affecting CO₂ internal corrosion in gas gathering pipelines and there exist the interaction and constraints between these factors affecting corrosion. For this reason, the qualitative analysis of combined effect of multiple factors on internal corrosion in the gas gathering pipeline using improved interpretative structural modeling is carried out in the paper, comprehensively searching factors affecting CO₂ internal corrosion in gas gathering pipeline, analyzing of the relevance between factors affecting internal corrosion of pipeline, and identifying the logic relationship among the direct and indirect factors affecting internal corrosion of pipeline to lay a good foundation for the best corrosion control measures. And then the quantification of various factors affecting corrosion is done by combining with Analytical Hierarchy Process (AHP) , to identify the relative importance of the factors affecting internal corrosion of gas gathering pipeline in quantitative way through comparison , Which will provide more reasonable reference of quantitative decision making for the future pipeline corrosion control and integrity management.