‘Mostly unusable’ | Existing gas pipes would need massive retrofit or crippling de-rating to carry hydrogen: study

Hydrogen is a very nasty little molecule. Not only does it transpire through virtually every single material trying to contain it. It also makes most metals brittle which means that the pipes in which the hydrogen is to be transported will become structurally weaker and weaker until there is a failure as the internal pressures cannot be kept in the pipe anymore. Expect some to operate at normal pressures for very friendly methane gas and then experience some nasty explosions. This is dangerous and puts billions of pipeline values and people’s lives at risk. 

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