Study On The Corrosion Factor Analysis And Anti-corrosion Measures Of In-service Gas Network In Chongqing

The gas pipeline currently being used in Chongqing has been eroded severely due to Chongqing having heavy soil erosion to the gas pipeline and the poor quality of the anticorrosive construction. The incident happening phase has arrived.Based on reviewing much domestic and overseas documentation , deeply understanding the Pipe corrosion theory and anti-corrosion technology and theory , testing on-site Corrosion points of gas network in Chongqing, collecting the data of all corrosion factor and choosing 15 corrosion points which have basically perfect data ,detecting anion concentration of the soil in the laboratory , And adding to the corrosion factors data form Of all points of corrosion . this article analyzes Chongqing gas pipeline network's erosion situation and finds out the diversified elements to affect the pipeline's erosion. Sorted out the corrosion factors Original data form Of all points of corrosion Via establishing mathematic model to analyze the erosion elements proportionally, conclude that the anticorrosive layer's resistance rate, the soil's resistance rate and the lacuna points are the most representative elements from the analysis from the main components and the clustering . For gas pipeline corrosion, based on fuzzy comprehensive evaluation method which based on fuzzy mathematics theory and the principle of the largest membership, set up the quantitative,concrete and practical feasible,evaluation model, Withal, taking the pertinence to upgrade the pipeline network's anticorrosive engineering to the system level overall consideration; referring to the domestic and overseas coating progressing and integrating Chongqing's local situation, for the ground imbedded pipeline, as much as possible , trying to use the PE plastic pipe or the steel pipeline using the prefab anticorrosion, anti-corrosion materials using three layers PE , And stuffing materials using the heat shrinking cover and the tallow rubberized fabric etc anticorrosive measures ;For the pipeline above ground, first using the heating shrinking cover to prevent the corrosion for the pipeline drilling through the wall and the building,using the new engineering process for the bushing to prevent corrosion, and change the middle pressure pipeline on the ground into zinc coating special pipeline to prevent the corrosion.As the analysis of pre-gas pipeline corrosion factor, worked out Countermeasures of anti-corrosion measures in-service gas network in Chongqing, defined the focus of anti-corrosion, had a clear focus of the anti-corrosion, raised the anti-corrosion level of new gas pipeline, It also provides the experiences to solve the problem which is similar to the gas pipeline corrosion in Chongqing...