Re: [APD] Aquatic-Plants Digest, Vol 35, Issue 8

[Madan Subramanian <madans at hathway_com>]

For any given flow rate, liquid CO2 will expand into more gas, than 
gaseous CO2 all by itself.

I agree about the recommended use of CO2 fire extinguishers in certain 
situations, but there is an individual fully awake and aware, who is 
releasing the CO2 in the confines of an enclosed home.

Unlike another situation where he is gassed while asleep.

I am not sure if CO2 has a characteristic smell, or some companies add 
something that gives out an odor to the gas, but I have had a CO2 tubing 
burst (at the connection to the solenoid valve, which is quiet hot), the 
pressure out of the regulator - 1.5 kg/cm2, it's almost impossible to 
get anywhere near the CO2 system and shut off the cylinder valve, I had 
to wrap a wet towel over my face to be able to do that, my nose was 
tingling for a while after I shut off the gas, this in my well 
ventilated open air balcony. It would be much more difficult to handle 
inside a room, worse inside a cabinet, the flexible tubing 
(silicone/airline) people use may not be able to handle the liquid-gas 
expansion.

A leak after the needle valve will be miniscule and can be easily worked on.

Anyway my system is piped to 5 tanks under 1.5kg/cm2 pressure, I use 
Polyurathane tubing ( max. pressure - 20kg/cm2) to pipe the gas, to the 
individual needle valves next to the aquariums. It will not be the case 
with many people.

Anybody know of CO2 regulators that limit the flow of gas through them? 
The welding regulators we use do not limit the gas flow. ;-)

Keep the cylinder upright, and you are safe. Have kids/pets around?, 
strap the cylinder to prevent it falling. The liquid-gas expansion and 
blah... blah.... well is just that. ;-)

Madan Subramanian
Bangalore, India.

> Again, one has to consider the effect of the flow rate. Fire 
> extinguishers typical are meant to dump lots of CO2 in a very short 
> time, pounds in just few miniutes art most. Gardeners' CO2 otoh, is a 
> miniscule flow rate.
>  
> It can be very safe to operate a fire extinguisher in an enclosed house. IN fact, it's the recommend corse of action in certain situations! ;-)
>  
> sh
>  
>   
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