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Old 12-04-2012, 04:31 PM   #21
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Nothing is safe around women and children...you're fuct.

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Old 12-04-2012, 04:33 PM   #22
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Nothing is safe around women and children...you're fuct.
Sounds like the voice of experience to me.
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Old 12-04-2012, 05:05 PM   #23
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If my O2 bottle is any judge, a 5# CO2 tank contains about 20 cubic feet of gas (when released). That's a LOT of CO2 into an 800 square foot apartment.
For CO2, I believe it's about 40 cubic feet at 1 atm, but whatever the correct answer, it's about what you say. An 8 foot by 800 square foot apartment has 6400 cubic feet (or a bit less) of air. Assuming efficient mixing and all the doors being open, that'd be an increase in concentration of about 0.6%. That's an order of magnitude higher than typical concentration, but according to this site, it's only slightly above the OSHA safety limit (0.5%) and well below the short-term exposure limit (1.5%). Based on the information there, you probably won't notice anything (or suffer any harm) unless you're exposed for a long time at that level.

This estimate would have to be off by an order of magnitude or so before there's serious short term danger. So there is certainly a risk, but I think it's relatively small (though higher than my earlier guess). Do make sure that your storage area has good ventilation at all times, for sure!


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And even with scuba tanks (3000 psi) you would have to be pretty determined to bust off the valve. I'm guessing that CO2 valves are made of brass like scuba tank valves and they tend to bend instead of break.
For the price of a strap to keep it upright, I'd rather not test that.
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Old 12-04-2012, 05:37 PM   #24
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Of course use a strap. I used to instruct scuba and students would drop a tank from time to time with no ill outcomes. It was fun to tell students that they had a tank of compressed air on their backs containing enough kinetic energy to lift a locomotive off its tracks. Man, their eyes got so big...then we went and looked at the wonders of the ocean. And my wife says I'm not a romantic...pfft

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Old 12-05-2012, 02:57 PM   #25
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Thanks for all the replies, really appreciate it everybody. Wish me luck as I prepare my rebuttal to convince her...

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Old 12-05-2012, 03:06 PM   #26
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Originally Posted by zeg View Post
For CO2, I believe it's about 40 cubic feet at 1 atm, but whatever the correct answer, it's about what you say. An 8 foot by 800 square foot apartment has 6400 cubic feet (or a bit less) of air. Assuming efficient mixing and all the doors being open, that'd be an increase in concentration of about 0.6%. That's an order of magnitude higher than typical concentration, but according to this site, it's only slightly above the OSHA safety limit (0.5%) and well below the short-term exposure limit (1.5%). Based on the information there, you probably won't notice anything (or suffer any harm) unless you're exposed for a long time at that level.

This estimate would have to be off by an order of magnitude or so before there's serious short term danger. So there is certainly a risk, but I think it's relatively small (though higher than my earlier guess). Do make sure that your storage area has good ventilation at all times, for sure!
Just keep in mind, the concentration will be much higher in the room the CO2 tank is in. Unless the apartment is loft style, with no walls that is. So while you might get none in some areas/rooms, you could have several times more where the tank actually is.

Just saying, better to secure it than not. Also better to not let your place get over about 120F come summer time. I'm sure neither will be an issue. You could point out that if it's hot enough for the safety to trigger, none of you will actually be home at that time.


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For the price of a strap to keep it upright, I'd rather not test that.
Exactery!
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Old 12-05-2012, 03:09 PM   #27
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Oh, yes. I completely agree. Like any piece of equipment, always treat a pressurized gas tank with due respect and take precautions to avoid accidents. I hope no one interprets my post as suggesting otherwise.

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Old 12-05-2012, 09:35 PM   #28
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Nothing is safe around women and children...you're fuct.
Get rid of kids?.............problem solved!
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Old 12-06-2012, 11:57 AM   #29
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I did HVAC for 15 years, we used co2 all the time. I'd pick up five 20lb tanks, throw them in the back of the truck on the hottest of days. To bust the valve off the tank something heavy would have to hit it.

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