1
$\begingroup$

Can we use a gas cylinder made of A6061, meant to carry air up to 300 bar, with Hydrogen up to the same pressure? If not, what is the maximum pressure that one can safely use hydrogen with?

$\endgroup$
4
$\begingroup$

Structurally the pressure is independent from the nature of the gas. So, it shouldn't matter if its $N_2$ or $O_2$. Special care should be taken with corrosive gases, but usually that means the containers need to be manufactured with corrosion resistant materials.

Regarding $H_2$ my main concern would be if it leaks out. Hydrogen is the lightest known gas. It may leak out of systems that are airtight for other gases and may collect in poorly ventilated upper reaches of buildings.

$\endgroup$
4
  • 1
    $\begingroup$ Depending on the materials involved, hydrogen embrittlement could be a serious safety issue. $\endgroup$ – alephzero Oct 7 '20 at 14:44
  • 1
    $\begingroup$ And remember the tank valve, it is unlikely to be aluminum. Aluminum does not embrittle like many common metals but the valve may be steel or have steel components that could embrittle under certain conditions. Hydrogen storage tank rooms normally have special features because hydrogen is prone to escaping.; I suggest storage outside .. . $\endgroup$ – blacksmith37 Oct 7 '20 at 18:52
  • $\begingroup$ Additional issues with hydrogen are permeation through metals & safety aspects mainly concerned with flammability. $\endgroup$ – Fred Oct 7 '20 at 20:02
  • $\begingroup$ Thanks for the answer and discussion! $\endgroup$ – AkhilMadem Oct 8 '20 at 9:52

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.