The Flammable Range (also called Explosive Range), the concentration range of a gas or vapor that will burn (or explode) if an ignition source is introduced, fo

The Flammable Range (also called Explosive Range), the concentration range of a gas or vapor that will burn (or explode) if an ignition source is introduced, for hydrogen is much larger then for methane. https://www.engineeringtoolbox.com/explosive-concentration-limits-d_423.html https://www.engineeringtoolbox.com/explosive-concentration-l... Becuse of hydrogen embrittlement you have to be carefull with material selection for pipes, storage tanks holding hydrogen. This not a big problem, but it means old pipes used for natural gas can not be used for hydrogen. https://en.wikipedia.org/wiki/Hydrogen_embrittlement https://en.wikipedia.org/wiki/Hydrogen_embrittlement