As opposed to propane being piped directly into your house?
Or a 500 gallon propane tank sitting right in your backyard on your home out in the country?
My propane tank is 150 ft away from my house, just saying.
“Or a 500 gallon propane tank sitting right in your backyard on your home out in the country?”
A 500 gallon propane tank will not blow up. It will likely rupture or the blow off valve will open spewing LPG into the air which will create one hell of a fire.
For it to blow up it needs to be mixed with O2.
A few years ago there was a garage fire that held two 20 lb propane tanks. They did not blow up.
I regularly use these small disposable propane tanks (like those for small grilles) for target practice. I also shoot at MAP gas bottles and diesel engine starting fluid cans. They do not blow up or catch fire. They rapidly vent.
I suspect likewise for hydrogen. The Hindenburg did not blow up, as the gas mixed with oxygen it rapidly burned.