Cheng, FrankDeng, Qiang (Charles)2015-07-022015-11-202015-07-022015Deng, Q. C. (2015). Statistical Analysis of Internal Corrosion of Sour Gas Pipelines (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/27875http://hdl.handle.net/11023/2329Gas gathering pipelines have played and will continue to play a critical role in safe, reliable transportation of sour gas. Highly corrosive gases and unstable operating conditions in gathering pipelines often contributes and results in serious internal corrosion. This study focuses on statistical analysis of the in-line inspection (ILI) data on sour gas gathering pipelines to understand the parametric effects on internal corrosion of the pipeline. The ILI data showed that the bottom of the pipeline does not experience appreciable corrosion. The serious corrosion was observed to always occur at the interface between gas and liquid phases. Studies also showed that internal corrosion defects were more likely to occur on the uphill segment of pipeline than the downhill segment. Simulations of the flow patterns in the pipelines confirm that the uphill segment has the slug flow pattern which is likely a key factor in causing internal corrosion.engUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.Engineering--MechanicalCorrosionsourpipelinesmaster thesis10.11575/PRISM/27875