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99142 SCC OF UNDERGROUND PIPELINES: A HISTORY OF THE DEVELOPMENT OF TEST TECHNIQUES

Picture for 99142 SCC OF UNDERGROUND PIPELINES: A
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Product Number: 51300-99142-SG
ISBN: 99142 1999 CP
Author: J. A. Beavers and C. E. Jaske
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External stress corrosion cracking (SCC) was first reported on underground pipelines in the mid-1960’s this mode of failure continues to be an integrity threat to the pipeline industry. In response to this threat, the industry has funded research to reproduce the cracking in the laboratory, to gain a better understanding of the controlling factors, and to develop means to mitigate cracking. This paper reviews the history of the development of the test techniques used in these laboratory studies. Techniques discussed include the slow strain rate technique, the tapered tensile test technique, constant displacement rate and cyclic load techniques with pre-cracked compact type specimens, and several electrochemical test techniques. Keywords: stress corrosion cracking, underground pipelines, SCC test techniques, slow strain rate, fracture mechanics, electrochemistry
External stress corrosion cracking (SCC) was first reported on underground pipelines in the mid-1960’s this mode of failure continues to be an integrity threat to the pipeline industry. In response to this threat, the industry has funded research to reproduce the cracking in the laboratory, to gain a better understanding of the controlling factors, and to develop means to mitigate cracking. This paper reviews the history of the development of the test techniques used in these laboratory studies. Techniques discussed include the slow strain rate technique, the tapered tensile test technique, constant displacement rate and cyclic load techniques with pre-cracked compact type specimens, and several electrochemical test techniques. Keywords: stress corrosion cracking, underground pipelines, SCC test techniques, slow strain rate, fracture mechanics, electrochemistry
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01592 100 mV POLARIZATION CRITERION AND EXTERNAL SCC OF UNDERGROUND PIPELINES

Product Number: 51300-01592-SG
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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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