Hydrogen produced during corrosion or through hydrogen blending into natural gas pipelines can lead to the degradation of ductility of metals used in these transmission pipelines. The effect of hydrogen on the mechanical properties of pipeline steels was studied for three grades of API 5L steels: X56, X65, and X100. These steels are either commonly used in or developed for use in natural gas transmission pipelines which are being considered for use in hydrogen blending. These steels were subjected to constant strain rate tensile testing after charging with electrochemically generated hydrogen. This paper reports on work to extend the life of the natural gas pipeline network via understanding the effect of hydrogen embrittlement induced by corrosion processes.

Subject
Embrittlement, Test methods, Hydrogen embrittlement, Stress concentration, Transmission pipelines, Electrochemical reactions, Fracture surfaces, Pipelines, Natural gas, Mechanical failure, Steel, Risk reduction, Hydrogen
Keywords:
hydrogen embrittlement, pipeline steel, natural gas
Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2024
GOV
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