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Old 12-10-2007, 03:50 PM   #1
Bromley
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My local TSC has oxygen canisters for welding on sale this week. Does anyone know if it would be ok to aerate with? The guy I brew with says he thinks it is not a food-grade oxygen. Are there really different grades of oxygen canisters?
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Old 12-10-2007, 04:01 PM   #2
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I sure wouldn't.
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Old 12-10-2007, 04:04 PM   #3
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as long as it's just O2 and not a welding gas mix then yes it will work... O2 is O2...
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Old 12-10-2007, 04:05 PM   #4
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I (and others) use the O2 canisters you can get at a hardware store for oxygenation. If it's pure enough for welding, it's pure enough for beer. I think medical grade oxygen doesn't even have to be as pure.
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Old 12-10-2007, 04:08 PM   #5
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I use the little red bottles from the welding section of The Depot. As mentioned, welders have pretty exacting standards with regards to their materials.
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Old 12-10-2007, 04:39 PM   #6
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Do some research before you use it though. I am sure people on here that use pure oxygen would be happy to help. The reason I am mentioning this is because I believe you can over-oxygenate with pure oxygen pretty quickly. I think you are only looking at about 30 seconds of O2 and no more. But don't take my advice, I don't use pure oxygen; I am going off of memory.

 
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Old 12-10-2007, 05:00 PM   #7
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I personally use between 1-2 minutes of pure O2 on a stainless stone at a very slow delivery rate.
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Old 12-10-2007, 05:04 PM   #8
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Quote:
Originally Posted by cubbies
Do some research before you use it though. I am sure people on here that use pure oxygen would be happy to help. The reason I am mentioning this is because I believe you can over-oxygenate with pure oxygen pretty quickly. I think you are only looking at about 30 seconds of O2 and no more. But don't take my advice, I don't use pure oxygen; I am going off of memory.
60-90 seconds. There's a school of thought that says you don't need much O2 if you pitch a properly-sized starter (since O2 is used in the yeasts' reproductive phase), but it's rare that a homebrewer pitches the "optimal" amount of yeast.
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Old 12-10-2007, 05:52 PM   #9
Bromley
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OK, thanks for the advice guys. I'll check into it a little more before I pick one up I think. Maybe take a look at the canister and see if it gives anything less than 100% O2.
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Old 12-10-2007, 11:37 PM   #10
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Quote:
Originally Posted by Buford
I (and others) use the O2 canisters you can get at a hardware store for oxygenation. If it's pure enough for welding, it's pure enough for beer. I think medical grade oxygen doesn't even have to be as pure.
but you apparently need a prescription to get a medical grade O2 tank re-filled.

People say you can oxygenate 20 batches from one little red 'home depot' welding bottle...a mere 1.6ounces of liquid O2.

For $8, I'll take that vs having to find a place that'll refill a larger O2 tank every 5 years, and having ot pay the recertification on the pressure test.
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