The next step is to replace all the ordinary fuel lines that previously transported gasoline with relatively low pressure and fairly little risk of leakage. The hydrogen will be stored under very high pressure and also transported through lines from the tank to the engine where there is a high risk of leakage at all connections. So in other words, all lines that are installed must be dimensioned according to the high pressure and volume.

The same applies to all connections and fittings, these must also meet the requirements that hydrogen makes to prevent leak out.[1]



[1](Dimitriou and Tsujimura, 2017)