RP3.10-02: Hydrogen and pipeline steels: orientation dependence of fracture toughness
Gas transmission pipeline operators need to be assured of safe gas transmission pipeline operation for pipelines carrying hydrogen. Currently there is a gap in knowledge regarding the orientation dependence of fracture toughness in pipeline steels influenced by hydrogen, that is how the fracture toughness depends on the orientation of the crack and the crack propagation direction. This orientation dependence is required for a full structural integrity analysis.
The worst-case influence on the fracture toughness caused by the orientation of the crack is being studied in RP3.1-10 ‘Hydrogen embrittlement of pipeline steels, subcritical crack growth and critical crack growth’. This proejct complements the RP3.1-10 by analysing the fracture toughness in two other crack orientations as well.
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|Commencement / End Date||January 2022 to May 2025|
|Outcomes / Impact||
Gas transmission pipeline operators need to know the safe operating conditions for pipelines carrying hydrogen including the permissible safe pressure, and tolerable defect sizes. This research will contribute information for the assessment of these safe operating conditions, with respect to hydrogen facilitated fracture and crack growth.
|Partners||University of Queensland, Worley.|
Dr Fari Mahdavi
Research Program Coordinator