Evaluating the Impact of Selective Seam Weld Corrosion on Pipeline Integrity

dc.contributorFranchek, Matthew A.
dc.contributorGrigoriadis, Karolos M.
dc.contributorLindner, Peggy
dc.contributor.authorGoldberg, Harry L.
dc.description.abstractThis thesis examines the impact of Selective Seam Weld Corrosion (SSWC) on the burst pressure of pipelines. This process is caused by factors like galvanic reactions, weld defects, and chemicals like sulfur becoming trapped in the weld material, and results in the longitudinal weld seams being corroded faster than the surrounding pipe material, creating a sharp v-shaped groove that creates a higher concentration of stress. This impact is worsened by the fact that this higher stress is experienced in the Heat Affected Zone, a relatively weak section of material compared to the base metal of the pipe. SSWC is relatively uncommon, seen primarily in ERW and EFW pipes manufactured before 1985, and thus warrants further study this thesis aims to contribute to. This thesis investigates the change in burst pressure when the same pipe sees a varying series of defects, investigating the relationship between this burst pressure and defect dimensions. These results were then compared to values from the Recalibrated PCORRC model, a mathematical model created to predict burst pressure with crack defects. Through this study, it was determined that defect has the largest impact on weakening a pipe's pressure-containing ability, with radius having a smaller but still significant impact. It was also determined that the Recalibrated PCORRC model was most accurate for cracks with a tip radius between approximately 0.7 to 1 mm. For larger radii, these results were further from the FEA results, however, this difference was conservative and predictable. Meanwhile, for radii smaller than 0.7 mm, burst pressures were overstated and inconsistent.
dc.description.departmentMechanical Engineering, Department of
dc.description.departmentHonors College
dc.relation.ispartofSenior Honors Theses
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectMechanical engineering
dc.subjectPipeline integrity
dc.subjectSelective seam weld corrosion (SSWC)
dc.subjectBurst Pressure
dc.titleEvaluating the Impact of Selective Seam Weld Corrosion on Pipeline Integrity
dc.typeHonors Thesis
thesis.degree.collegeCullen College of Engineering
thesis.degree.nameBachelor of Science


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