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67skylark

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o2 question
Mar 20^th, 2009 at 7:08pm

Last Monday I had a doc appt. and asked him about the O2 I hadnt studied it yet so I couldnt educate him about it and he acted as though he had never heard of the therapy, but did tell me that Welders bottle could be contaminated. In all my years around a torch never seen anything but O2 in em. They always seem to mix well with Acetylene anyhow. Anyone ever heard of this as a problem.
Jim

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Potter

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Re: o2 question
Reply #1 - Mar 20^th, 2009 at 7:12pm

67skylark wrote on Mar 20^th, 2009 at 7:08pm:

Last Monday I had a doc appt. and asked him about the O2 I hadnt studied it yet so I couldnt educate him about it and he acted as though he had never heard of the therapy, but did tell me that Welders bottle could be contaminated. In all my years around a torch never seen anything but O2 in em. They always seem to mix well with Acetylene anyhow. Anyone ever heard of this as a problem.
Jim

Nope.

Kinder gentler Potter

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Linda_Howell CH.com Moderator CH.com Alumnus Offline Do not feed the Moderators Posts: 11927 Santa Maria, Ca. Gender:	Re: o2 question Reply #2 - Mar 20^th, 2009 at 10:03pm The medical 02 suppliers would love for you to think that. There is no difference. Oh....except for the cost. They used to want to charge me 42.00 for an e-tank. My M tank of welders cost me 23.00 and I get 3 to 4 times as many hits aborted. I only use my e-tanks when I need to be portable.
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Marc

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Re: o2 question
Reply #3 - Mar 20^th, 2009 at 10:56pm

I have never heard of a contaminated O2 tank. With some of the high tech stuff being done these days, they can't afford to have impurities ruining the welds on expensive stock. If you want to be really, really sure - buy a new tank or two and have them refilled.

The product inside is indeed identical. I even drove to the largest O2 supplier in my state and visually and verbally verified it.

I use welding O2 in a "T" size tank which stays in my garage and serves as the mother ship for my smaller travel tanks. For about $100, I bought a very well built transfill kit specifically designed for filling small O2 tanks. I use the big tank directly when I'm home.

I paid $45 for a year lease on their big tank and I pay $18.50 per “T” tank swap which holds over 9,000 liters – about the same as (14) E tanks.

Keep in mind that ALL welding tanks, large and small have a CGA-540 threaded fitting on top. This is the same type used on LARGE medical O2 tanks too, so if you buy a regulator with CGA-540 style fitting, it will fit either.

In order to use smaller, portable medical O2 tanks, you will need a connector type referred to as a CGA-870 style. You can either buy a spare regulator with this kind of connector, or an adapter to use your "big tank" regulator on your small medical tank(s).

Disclaimer: I'm not suggesting that you actually breathe welding O2 because it's not medically certified. Let me know if you need more info about this hypothetical situation.

Marc

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« Last Edit: Mar 20^th, 2009 at 11:00pm by Marc »

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ClusterChuck

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Re: o2 question
Reply #4 - Mar 21^st, 2009 at 12:02am

From what I know about welding (not a whole lot) and from talking to a lot of professional welders, they NEED 100% oxygen to get clean, solid welds. If there is any contamination in there, it causes bad welds.

In talking to two different oxygen tank filler companies, they both told me that they use the same equipment, same procedure, and same standards, whether they are filling medical or welding tanks.

Chuck

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CAUTION: Do NOT smoke when using or around oxygen. Oxygen can permeate your clothing or bedding. Wait, before lighting cigarette or flame.

Keep fire extinguisher available, and charged.

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Marc

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Re: o2 question
Reply #5 - Mar 21^st, 2009 at 12:33am

Chuck,

Just in the interest of clarity: Welding and medical O2 tanks are indeed filled with the same product but the tanks are handled differently.

Legally, before refilling medical O2 tanks, they have to be evacuated (an actual vacuum pump is used) in order to:
Remove any remaining product
Remove all moisture (moisture cannot exist in a vacuum)

The common practice for refill of welding O2 tanks is to blow off anything left in the tank, then refill. Pulling a vacuum is considered to be costly, time consuming and pointless because the tank had O2 in it to begin with.

Marc

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« Last Edit: Mar 21^st, 2009 at 12:48am by Marc »

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ClusterChuck CH.com Alumnus Offline The BEAST rises again, and again, and again, and . Posts: 5394 Greenville, North Carolina Gender:	Re: o2 question Reply #6 - Mar 21^st, 2009 at 7:43am Thanks, Marc! The guys that I spoke to did not mention that process! I bow to your superior information! Thanks for pointing it out, clearing that up. Chuck
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Marc Ex Member Gender:	Re: o2 question Reply #7 - Mar 21^st, 2009 at 9:56am ClusterChuck wrote on Mar 21^st, 2009 at 7:43am: I bow to your superior information! Not superior, Sir. Supplemental
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67skylark

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Re: o2 question
Reply #8 - Mar 21^st, 2009 at 7:45pm

Wow y'all sure do answer a question. And I'm greatfull. I didn't buy the contamination theory either. I felt sure that the gas shop would fill both style tanks with the same product. And I have never seen anyone leave any type of gas bottle open when empty. You always close the valve to disconnect. So the chance of the bottle pulling any other vapor in would be super small. Even when the tank is empty they almost always have a bit of pressure in them.
Thanks for the replies
Jim

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Larry CH.com Newbie Offline I Love CH.com! Posts: 8 Arizona Gender:	Re: o2 question Reply #9 - Mar 21^st, 2009 at 9:47pm Medical grade oxygen is nearly pure where as welding or aviation oxygen has un-regulated impurities. Lar
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Marc

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Re: o2 question
Reply #10 - Mar 21^st, 2009 at 10:14pm

Hi Larry,

I most certainly agree with the regulation part as I've already posted at length about that.

I'm genuinely interested to learn more about the specifics of the "unregulated impurities" that you refer to in your post. What are they? Where do they come from? How do they get into the liquid O2 tanks in the manufacturing process? I've invested a lot of time and effort looking into this and I'm always eager to learn more.

Years ago, there were several grades for Industrial, Aviation, Medical1, Medical2, etc. Now, they are the identical product unless you are referring to 99.9999% scientific gas - then I understand your point - but that stuff costs about as much as Platinum.....

Marc

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ClusterChuck CH.com Alumnus Offline The BEAST rises again, and again, and again, and . Posts: 5394 Greenville, North Carolina Gender:	Re: o2 question Reply #11 - Mar 21^st, 2009 at 11:57pm Larry wrote on Mar 21^st, 2009 at 9:47pm: Medical grade oxygen is nearly pure where as welding or aviation oxygen has un-regulated impurities. Lar As Marc said, could you elaborate on this? What are the percentages of the impurities? What ARE the impurities? What are your sources for this information? Chuck
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Potter CH.com Alumnus Offline Team MOOSE DROOL Stinky Stuff on a Hook Prostaff Posts: 3600 Blgs.Mt. Gender:	Re: o2 question Reply #12 - Mar 22^nd, 2009 at 11:21am Larry wrote on Mar 21^st, 2009 at 9:47pm: Medical grade oxygen is nearly pure where as welding or aviation oxygen has un-regulated impurities. Lar Crap. Kinder gentler Potter
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midwestbeth CH.com Sponsor Offline Posts: 1123 Edwardsville, IL Gender:	Re: o2 question Reply #13 - Mar 22^nd, 2009 at 11:38am I started out using medical grade 02 and now only use welders. Both have the same end result..........aborted ch. I can't tell the difference between the two. Beth
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AlienSpaceGuy CH.com Old Timer Offline Greetings from outer space Posts: 254 Northpole Gender:	Re: o2 question Reply #14 - Mar 22^nd, 2009 at 2:34pm Larry wrote on Mar 21^st, 2009 at 9:47pm: Medical grade oxygen is nearly pure where as welding or aviation oxygen has un-regulated impurities. Lar I wonder what aviation oxygen is used for? To boost the jet engines?
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67skylark CH.com Newbie Offline Just remember no matter where you go there you are Posts: 18 Petersburg, Va. Gender:	Re: o2 question Reply #15 - Mar 22^nd, 2009 at 6:05pm As Batch says in the link to the left. Aviation grade O2 is supplied to pilots, all fighter pilots breath it from start of misson to end. It would be what you would breath if the little masks ever fell down in an airliner, I think, not sure of that. It's also what all the Astrounaunts had to breath until Apollo 1 fire. Jim
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