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The Susceptibility of Electric Resistance Welded Line Pipe to Selective Seam Weld Corrosion

Ritchie, Porter
http://orcid.org/0000-0002-2303-9413
http://rave.ohiolink.edu/etdc/view?acc_num=osu1586336007742949

Abstract Details

2020, Master of Science, Ohio State University, Materials Science and Engineering.
Selective seam weld corrosion (SSWC) is a localized corrosion phenomenon and an integrity threat to pipelines consisting of electric resistance welded (ERW) line pipe. Due to the typical morphology of SSWC, the corrosion anomalies associated with the mechanism are difficult to detect with currently available in-line inspection (ILI) technologies, limiting the ability of pipeline operators to mitigate the threat. Further, the SSWC phenomenon is not fully understood, and no standard method or criterion has been developed to determine the susceptibility of welded line pipe to SSWC. As a result, the Pipeline and Hazardous Materials Safety Administration has instituted conservative regulations for anomalies located at or along the seam weld. Currently, regulations do not contain guidelines for operators to distinguish between ILI anomalies associated with localized versus generalized corrosion when features are detected at or along the seam weld. In this research, the susceptibility of ERW seam welds is studied through the use of accelerated corrosion testing of ERW seam weld samples followed by benchmarking the comparative corrosion depths in the weld region and base metal using optical profilometry. The results of the testing are correlated to samples with empirically known susceptibility to SSWC, and the microstructure, chemical composition, specific welding process, and vintage of each sample. This work improves the diagnosis methods for SSWC, increases the understanding of SSWC, and provides an opportunity for improving the effectiveness of seam weld integrity management programs by operators. These improvements will not only prevent catastrophic pipeline failures but will also reduce unnecessary expenditures by pipeline operators on excavations and help eliminate potential revenue losses due to pressure reductions or unplanned pipeline shutdowns during assessments.
Gerald Frankel, Dr. (Advisor)
Narasi Sridhar, Dr. (Committee Member)
Christopher Taylor, Dr. (Committee Member)
137 p.
Materials Science
selective seam weld corrosion, pipelines, electric resistance weld, line pipe, steel, pipeline integrity

Recommended Citations

Citations

  • Ritchie, P. (2020). The Susceptibility of Electric Resistance Welded Line Pipe to Selective Seam Weld Corrosion [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586336007742949

    APA Style (7th edition)

  • Ritchie, Porter. The Susceptibility of Electric Resistance Welded Line Pipe to Selective Seam Weld Corrosion. 2020. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1586336007742949.

    MLA Style (8th edition)

  • Ritchie, Porter. "The Susceptibility of Electric Resistance Welded Line Pipe to Selective Seam Weld Corrosion." Master's thesis, Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586336007742949

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.