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07128 Methodology for Ranking SCC Susceptibility of Pipeline Segments Based on the Pressure Cycle History

Picture for 07128 Methodology for Ranking SCC Susceptibility of Pipeline Segments Based on the Pressure Cycle Hi
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Product Number: 51300-07128-SG
ISBN: 07128 2007 CP
Author: John A. Beavers, Carl E. Jaske, Robert Grant Worthingham, and Clifford J. Maier
Publication Date: 2007
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Operating pipelines are subjected to cyclic loadings, primarily as a result of pressure fluctuations. The cyclic loadings are a contributing factor in crack growth by near-neutral pH stress corrosion cracking (SCC). As part of pipeline integrity management programs, it is necessary to perform threat assessments of pipelines and prioritize segments of the pipelines for risk from the various threats. This paper describes methodologies for ranking pipeline segments for risk from near-neutral pH SCC based on the cyclic loading history. The approaches are based on over ten years of research funded by the Pipeline Research Council International, (PRCI) and the Gas Research Institute (GRI) and relates the strain rate or displacement rate at pre-existing cracks in the pipeline, calculated from the pressure history, with crack growth rate.
Operating pipelines are subjected to cyclic loadings, primarily as a result of pressure fluctuations. The cyclic loadings are a contributing factor in crack growth by near-neutral pH stress corrosion cracking (SCC). As part of pipeline integrity management programs, it is necessary to perform threat assessments of pipelines and prioritize segments of the pipelines for risk from the various threats. This paper describes methodologies for ranking pipeline segments for risk from near-neutral pH SCC based on the cyclic loading history. The approaches are based on over ten years of research funded by the Pipeline Research Council International, (PRCI) and the Gas Research Institute (GRI) and relates the strain rate or displacement rate at pre-existing cracks in the pipeline, calculated from the pressure history, with crack growth rate.
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02426 THE INFLUENCE OF SOIL CHEMISTRY ON SCC OF PIPELINES AND THE APPLICABILITY OF THE 100 mV POLARIZATION CRITERION

Product Number: 51300-02426-SG
ISBN: 02426 2002 CP
Author: J. A. Beavers, C. L. Durr, and K. C. Garrity
Publication Date: 2002
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The objective of the research summarized in this paper was to define pipeline conditions where use of the 100-mV polarization criterion may be conducive to possible SCC problems. Paper Number 01592, presented at Corrosion/2001, summarized Part 1 of the research, in which the previous research results were analyzed. In this paper, the results of the laboratory testing are presented.
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