With all due respect, TRIMIX (oxygen, nitrogen and helium) is a diving gas. I didn't realize / have never heard it used in welding, but please correct me if I am wrong.
And the NITROX (oxygen / nitrogen mixed with a higher O2 content than regular everyday 'air') I mentioned in my post refers also to a diving gas.
But, a dive on Nitrous Oxide would be an interesting event / experience (not!). ;-)
: I drove a truck for a welding gas supplier
: back in college.
: Oxygen comes in several standard sizes, the
: most common being 244 cubic feet.
: However this is the same physical size
: bottle that helium, nitrogen, tri-mix (a
: welding shield gas), nitrous oxide (dentist)
: and CO2 also come in.
: A 300 ft3 oxygen cylinder is the same
: physical size as standard cylinders of argon
: (another welding shield gas) and a few other
: All this to say that the size of the
: cylinder is irrelevant as to contents.
: Acetylene comes in different sizes also, but
: the cylinder shape is different - more short
: and squat (in addition to the threads being
: reversed, as noted by another post). So it's
: easy to distinguish acetylene from
: everything else.
: Gas type is determined by color, but in the
: industry there is no standard (medical
: oxygen *may* always be green, but I'm not
: sure). Colors are pretty much determined by
: the company or plant that fills them. My
: company painted O2 baby-shit yellow with a
: bright yellow collar.
: I would imagine, though, that the military
: has some kind of standardization, because
: that's what militaries do.
: Carry on.