"GeorgeB" wrote in message
...

I've far more experience with industrial compressed gasses than with
aircraft oxygen, and see much more "compressed breathing air" than
BREATHING compressed O2. (Oxygen for oxyacetelyne is to different
standards, but I think it is just as good; several college buddies
would spend some time breathing it after having too much to drink the
night before. Ah, the REAL hangover cure.

Firefighters and scuba divers use it in large quantiies. Bottles are
common with gas suppliers. What I don't know is how the fittings
compare.

Nor do I know how a plane's bottles are filled; via compressor from
low pressure sources, high pressure via cascade bottles, or ???

I do know that the fittings need to be clean of oxydizable materials;
storoes of a little oil on gauge threads, if true, keep one careful.


In a previous life I was in aircraft maintenance. Aviator's breathing
oxygen systems were serviced from just two sources; compressed oxygen
bottles or liquid oxygen carts. The only other compressed gas bottle used
for servicing aircraft was nitrogen. I don't recall what measures were
taken to prevent servicing oxygen systems with nitrogen, other than colors
and markings on the bottles, but servicing oxygen systems with nitrogen
would be a very bad thing.