Published on 27 March 2014
Metallic pipelines operating in high pressure CO
2-containing impurities such as H
2S experience corrosion and cracking issues. Under such extreme conditions, a major technical challenge is quantifying degradation of different transport components, including pipes, welds and pumps, in CO
2 as a high pressure gas or as a supercritical fluid, particularly in the presence of H
2S. Although there is considerable experience of testing materials in lower pressure CO
2, there are no standard test methods and few data for supercritical CO
2.
To address these issues TWI initiated a Joint Industry Project where corrosion rates and cracking data of various representative pipeline alloys were experimentally determined. This information is likely to allow confident new build design and better evaluation and re-use of existing pipelines which are in contact with supercritical CO
2-containing fluids.
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