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A comment on India’s biggest businesses are tapping green hydrogen as a future fuel. Parent comment

Re:India’s biggest businesses are tapping green hydrogen as ... by regularfry on Monday July 04, 2022 @02:56AM (#31974234)
That precludes reusing existing infrastructure at the same pressures as today, though. For the same pressure, H2 will leak worse than natural gas.

And it's not just a pressure problem, either: embrittlement will happen at room temperature and pressure, just through diffusion.

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Re:India’s biggest businesses are tapping green hydrogen as ... by ncmncm on Monday July 04, 2022 @04:37AM (#31974867)
Embrittlement is a problem at high pressure because the stuff being embrittled has to be strong to contain pressure. Take away the pressure, and it only needs to not have holes in it.

For decades, lamp gas -- carbon monoxide and hydrogen - was piped to homes, factories, offices, and ... street lamps, in cast -iron pipes. Then they switched to methane, same cast-iron pipes. They started out pretty brittle, really. Still in use, though.

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