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Scuba Forum / General / May 2004

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Purging tanks

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Army George - 21 May 2004 20:07 GMT
I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
tanks full of oxygen and carbon dioxide (for beer keg) that I need to
purge in order to ship.  Last time I moved I just opened them all up
because I was in an open area, but now I'm living in close quarters in
a cul-de-sac full of duplexes.  Is it safe to purge these gases here?
I can imagine a smoker walking by or some kids passing out because I
flooded the area with CO2...please help!
Larry Anta - 21 May 2004 20:09 GMT
> I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
> tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 3 lines]
> I can imagine a smoker walking by or some kids passing out because I
> flooded the area with CO2...please help!

Purge the CO2 tank in the greenhouse of your local nursery.  Plants love it.
mike gray - 21 May 2004 21:04 GMT
> I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
> tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 3 lines]
> I can imagine a smoker walking by or some kids passing out because I
> flooded the area with CO2...please help!

 Take em to an open area and drain em slowly. No problem.
mike gray - 21 May 2004 21:05 GMT
> I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
> tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 3 lines]
> I can imagine a smoker walking by or some kids passing out because I
> flooded the area with CO2...please help!

Addendum: By open area, I mean a park or such, not yer garage.
Dillon Pyron - 21 May 2004 21:47 GMT
>I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
>tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 3 lines]
>I can imagine a smoker walking by or some kids passing out because I
>flooded the area with CO2...please help!

Purge them together in a closed room.  They'll cancel each other out.
And use a fan to make sure they mix well.
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dillon

When I was a kid, I thought the angel's name was Hark
and the horse's name was Bob.

Steve - 22 May 2004 00:45 GMT
>> have
>>tanks full of oxygen and carbon dioxide (for beer keg) that I need to
>>purge in order to ship.

> Purge them together in a closed room.  They'll cancel each other out.
> And use a fan to make sure they mix well.

That might work if he had tanks of acid and tanks of base, but O2 and CO2 don't
cancel each other out. CO2 is a very serious issue at concentrations of 4%, even if
the other 96% of the gas is O2. OTOH, unless he has a shitload of tanks he probably
doesn't have enough CO2 to matter as long as he releases it slowly in a well
ventilated area. If you released 400CF in a 2500 SF house you'd end up with 2% CO2
when it was thoroughly diffused, though I wouldn't suggest staying home. Cracking the
valve on a tank and letting it drain in 30 minutes in the driveway will be
meaningless if there's the least bit of breeze. Similarly, it would take a shitload
of O2 to raise the concentration to the point of creating a hazard as long as it's
released slowly. Assuming he doesn't need to move tomorrow, he can do it safely 10
yards from the front door.

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Steve

The above can be construed as personal opinion in the absence of a reasonable
belief that it was intended as a statement of fact.

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David Scarlett - 22 May 2004 02:43 GMT
> That might work if he had tanks of acid and tanks of base, but O2
> and CO2 don't cancel each other out.

WOOOOOOOOOOOOOOOOOOOSH :-D

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David Scarlett

dscarlett@_ _ _ _ _ _ _ _
_ _ _ _ _ optusnet.com.au

Joe English - 22 May 2004 05:15 GMT
>>> have
>>> tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 16 lines]
> he doesn't need to move tomorrow, he can do it safely 10 yards from the
> front door.

I think they missed the sarcasm!
Crownfield - 22 May 2004 06:43 GMT
> >> have
> >>tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 6 lines]
> cancel each other out. CO2 is a very serious issue at concentrations of 4%, even if
> the other 96% of the gas is O2.

why?

> --
> Steve
John Francis - 22 May 2004 02:53 GMT
>I'm moving to from Hawaii to Philadelphia (yeah, I know) and have
>tanks full of oxygen and carbon dioxide (for beer keg) that I need to
[quoted text clipped - 3 lines]
>I can imagine a smoker walking by or some kids passing out because I
>flooded the area with CO2...please help!

Just fart before you open them up. No one will stay within 3 blocks.

JF
- 22 May 2004 11:43 GMT
CO is flammable.  CO2 is not.  The only worry is perhaps hypercapnia if too
much CO2 is inhaled.  Not much of a concern.

Best regards,
Larry

> I can imagine a smoker walking by or some kids passing out because I
> flooded the area with CO2...please help!
 
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