Recent studies have shown that adapting existing natural gas networks for hydrogen transport is four times more cost-effective than building new ones.
Repurposing natural gas pipelines addresses technical concerns, including hydrogen embrittlement of steel and welds, as well as permeation and leakage.
Hydrogen embrittlement is a process in which tiny hydrogen molecules permeate the material in pipes, dissociate on metal surfaces, and dissolve into the metal lattice, changing the mechanical response of the alloy. This can lead to fatigue, fractures, and leaks.
To prevent this, coating, sleeves, and casing of materials with the right resistance to hydrogen embrittlement are crucial.
https://todaysfocusofattention.com/repurposing-gas-pipelines-for-hydrogen/
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