[Osage Orange]

U be right....

I'm a RRT and know a little about 02

[Blueflag]

The “no smoking, oxygen in use” signs are so some schmuck doesn’t have their lit cigarette burst into flames, ignite their clothes and hair etc etc.

But the OXYGEN never burns - it just helps other stuff burn or blowed up real good ;-)

BTW, your O2 cylinders are green, right? Or come out the wall from a tank elsewhere?