Milt covered the fuel gas part quite well. Here is some info on
safety with the Oxygen tanks.
Always protect the valve from being hit or damaged. The high
pressure will send the tank flying like a torpedo if broken off.
That’s why tanks are chained and the big ones have a metal cap to be
on the tank whenever it is not hooked to a system and fastened.
Leak testing fittings, hoses etc. is great. HOWEVER be sure that
you do not use a petroleum based soap etc. Oils and Oxygen mix
explosively. Best to buy a soap bubble solution rated for Oxygen if
you use it on anything with Oxygen. Ever notice all those warnings
"use no Oil"?
I just want everyone to use common sense and have the knowledge to