Fittings for Oxygen vs. Acetylene

[McDermott1711]

"...Some gas fittings are left-handed to prevent disastrous misconnections. For example, oxygen fittings are right-handed, but acetylene, propane, and other flammable gases use left-handed fittings."
Link

Is it true? Do you have any experience in this regard?

 

[hydroman247]

Yes it is true.

No experience in connecting the wrong pipes though!

 

[moltenmetal]

CGA fittings use various combinations of left and right hand threads, interior and exterior threaded nuts, and various sized glands, to try to avoid hazardous mix-ups of gases from cylinders, whether that be composition or pressure. Of course the CGA fittings typically thread into the regulator with a 1/4" NPT fitting, so the possibility that a dedicated idiot will mix them up still exists.

 

[racookpe1978]

Non-flammable gasses using right-hand (conventional threads) fittings in this case include oxygen. But also CO2, argon, helium, and other mixes.

 

[McDermott1711]

Thanks a lot for your reply!

 

[rconner]

[If folks are going to be messing with compressed gas cylinders and piping/controls for same etc., it perhaps should be mentioned there are a many more nuances/niceties of such that are also important e.g. OSHA regs and some detailed training e.g.

http://www.chem.purdue.edu/chemsafety/chem/gaslaws.htm.

] Have a good weekend.