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German & French Officials Break Ground on Cross-Border Hydrogen Pipeline (www.pipeline-journal.net)
submitted 2 days ago by [M] to c/hydrogen@piefed.social
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Construction on Saarland’s first hydrogen pipeline officially began in Wallerfangen at the end of August, marking a pivotal milestone for green energy infrastructure in the Greater Region.

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[–] 2 points 2 days ago (5 children)

Why does the pipe need to do that before (or after?) the valve? Seems like a weird flex.

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  • [–] 3 points 2 days ago* (last edited 2 days ago) (3 children)

    I'm assuming that it is similar to the trap in your sink. Except because hydrogen is the lightest element, it has to be upside down. Confident that this is for preventing backflow when the valve is closed and the pipe is opened for maintenance.

    Edit: I appear to be incorrect and it has to do with handling the expansion and contraction of the pipe.

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