On Jul 12, 4:39*pm, ContestID67 wrote:
Anyone have an address in the Chicago area to obtain aviation grade
oxygen? *I have a friend who is having a heck of a time finding it.
You would think that some of the smaller airports handling executive
jets would have it.

Thanks, John

John
I just Googled Welding supply in Chicago, came up with 10-12 hits.
Call and ask if they have ABO. and if they will fill your bottle. A
big

I've got 3 big bottles in my hangar that I buy from California Tool
And Welding, It IS all the same gas welding (industrial), medical &
ABO, the difference is when they fill my ABO dedicated bottles they
have an "Analizer" that tests the moisture content as they fill. If
they detect more than 5 ppm of moisture they reject dump & refill
until they get a reading below 5 ppm, I've watched them do it. I just
called my vender they charge $7.29 per 100 cu'. It's doubled since my
last fill a year ago. If you find an FBO I'd bet they will be between
$35-$50 for 25cu'.

The 2 reasons ABO is analyzed is it was/is feared that too high of
moisture content at high altitude the moisture along with the
expansion of the gas and very low temps could freeze up the regulator
and cause equipment malfunction. The other reason is/was older bottles
were made of iron, moisture corrodes iron creating rust, breathing
rusty oxygen is not good for you and the rust could create equipment
malfunctions.

Really I'm making this up it's bull **** but it sounds good, eh.