It's a gas

Oh, and the mix is 85/15, but you already knew that.

"KLC Lewis" wrote: (clip) is the gas still good? I've heard rumors that the

^^^^^^^^^^^^^^^^^^ Gasses don't settle.

"Settle" wasn't the right word. "Stratify" would be better.

They don't stratify either. Once a homogenous mixture is attained when the gasses are blended they stay homogenous.

I would hope that this is true, as it would make my life easier. Can you address the claim by various sites which claim that stratification can occur in cylinders, and the (supposed) advantages with mixing stations sold by various vendors to overcome this (supposed) problem? Also, claims in some threads on welding discussion boards that cylinders should be rolled on the floor to mix "stratified" gases?

Thanks for your comments :-)

on Fri, 17 Oct 2008 11:00:24 -0500, "KLC Lewis" wrote this wisdom:

No - someone's having you on mate !

The gases will still be properly mixed, that's one of the properties of gases from liquids and solids.

:-)

That's three for your side, none against so far. Thanks! :-)

"SteveB" wrote: You will need them professionally mixed. You're lucky, as I am a retired

^^^^^^^^^^^^^^^^^^^ Competition being what it is in these trying times, I can make you a better deal. I have a mixing wand that can do them in the bed of your truck, so you don't have to come back at "fourish." And I don't charge any more than Steve B, either.

"KLC Lewis"wrote: "Settle" wasn't the right word. "Stratify" would be better. ^^^^^^^^^^^^^^^^^^^ Well, paaardon meeee. I chose the word "settle" because I was trying to connect with the OP, who used it in his question. Of course, I could have said "stratify," or "layerize," or even "de-homogenize," but I felt that what I wrote created a better communicative milieu.

Now, as to my communication with you: I will settle for stratify if you insist.

Steve, You forgot the six-pack in addition to the C note!

Bob

You will need them professionally mixed. You're lucky, as I am a retired gas mixer. Drop them at the end of my driveway tomorrow morning with a $100 bill, I'll do them for you, and you stop by say fourish to pick them up.

DO NOT ATTEMPT TO WELD WITH SEPARATED GASES.

Steve

I heard a tip that "fuel line magnetizers" from Harbor Freight work great to mix gases inside cylinders, by means of magnetic apoplexy.

Actually, I was the OP, and was clarifying my own question.

Thanks, :-) Karin

Ha! Okee dokee, then. lol

On Oct 17, 8:50=A0am, "KLC Lewis" wrote: I've heard rumors that the

You should have paid more attention is chemistry class. CO2 has a molecular weight of 44. C is 12 and O is 16. Argon has a molecular weight of 40. So they are both close to the same weight.

=20 Dan

"KLC Lewis" wrote: Actually, I was the OP, and was clarifying my own question. ^^^^^^^^^^^^^^^^^^^ Would you please not mention that? It makes me look (and feel) awfully dumb.

Reminds me of an old 'Candid Camera', the air in your tires needs changing.

I've had smaller tanks of C25 and 90Ar8C2O sit for years with no trouble (at least as far as I could tell). Some years ago many of the gas companies replaced the valves in their mixed gas cylinders with eductor (dip) tube types. There is a difference between these and the dip tubes used for tanks containing liquid gasses, not sure if they are supposed to agitate the gas on withdrawl or withdraw from multiple heights at the same time.

There was some noise from customers about the arc "going cold" as the tanks drew down below 500psi. I'm sure these were production type operations that noticed that parameters were changing while welding with set procedures (not a good thing for the gas salesman).

I enjoyed the follow ups to this thread (to bad I didn't think of the 100 bucks offer...).

Matt

Not half as silly and dumb as I feel. lol