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you shouldn't allow an acetylene tank to freeze? #4469416
07/24/17 09:29 PM
07/24/17 09:29 PM
Joined: Jun 2009
Posts: 3,823
Chicago, IL
tomcat27 Offline OP
tomcat27  Offline OP

Joined: Jun 2009
Posts: 3,823
Chicago, IL
I am looking at purchasing an oxy/acetylene setup and was reading safety info on the like. I was surprised that it said to not store an acetylene tank below freezing - that the acetone in the tank could separate and theoretically be unsafe. is this true? I certainly don't want to bring the tank inside in the winter!


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4469426
07/24/17 09:45 PM
07/24/17 09:45 PM
Joined: Dec 2016
Posts: 8,017
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,017
Waco, TX
There shouldn't be ANY water in there, and acetone doesn't freeze (as far as I know)

When I lived in North Dakota, the Acety tanks were in freezing temps all the time.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: Linctex] #4469431
07/24/17 09:50 PM
07/24/17 09:50 PM
Joined: Mar 2016
Posts: 1,945
Western S.C.
CR94 Offline
CR94  Offline

Joined: Mar 2016
Posts: 1,945
Western S.C.
Originally Posted By: Linctex
There shouldn't be ANY water in there, and acetone doesn't freeze (as far as I know) ...
Neither does acetylene, as far as I know.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4469440
07/24/17 09:58 PM
07/24/17 09:58 PM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline

Joined: Sep 2016
Posts: 1,418
Minnesota
Acetone that absorbs the gas in the cylinder has a very low freeze point, -93 C to start freezing according to google I hope to never see those kind of outdoor temps. Greater danger is to get the gas to a pressure above 15 lbs or around copper



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Re: you shouldn't allow an acetylene tank to freeze? [Re: bioburner] #4469474
07/24/17 10:33 PM
07/24/17 10:33 PM
Joined: Nov 2009
Posts: 5,220
Houston, Texas
motor_oil_madman Offline
motor_oil_madman  Offline

Joined: Nov 2009
Posts: 5,220
Houston, Texas
Originally Posted By: bioburner
Acetone that absorbs the gas in the cylinder has a very low freeze point, -93 C to start freezing according to google I hope to never see those kind of outdoor temps. Greater danger is to get the gas to a pressure above 15 lbs or around copper


I thought it was 20. I know at my welding school they had it in the danger level on the gauge and i think i turned it down. Nothing ever happened. I forgot what they said would happen, but I think it was actually propylene due to cost and safety.

Last edited by motor_oil_madman; 07/24/17 10:33 PM.

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Re: you shouldn't allow an acetylene tank to freeze? [Re: bioburner] #4469506
07/24/17 11:16 PM
07/24/17 11:16 PM
Joined: Jun 2003
Posts: 18,431
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline

Joined: Jun 2003
Posts: 18,431
Deplorable in apple valley, ca
Originally Posted By: bioburner
Acetone that absorbs the gas in the cylinder has a very low freeze point, -93 C to start freezing according to google I hope to never see those kind of outdoor temps. Greater danger is to get the gas to a pressure above 15 lbs or around copper
copper?


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Re: you shouldn't allow an acetylene tank to freeze? [Re: Chris142] #4469554
07/25/17 02:57 AM
07/25/17 02:57 AM
Joined: Mar 2013
Posts: 496
Australia
Ducman Offline
Ducman  Offline

Joined: Mar 2013
Posts: 496
Australia
Originally Posted By: Chris142
Originally Posted By: bioburner
Acetone that absorbs the gas in the cylinder has a very low freeze point, -93 C to start freezing according to google I hope to never see those kind of outdoor temps. Greater danger is to get the gas to a pressure above 15 lbs or around copper
copper?


Copper.
That's a new one on me.
They never taught us that in college.

Three things come to my mind that we were taught.
1, Don't lay the cylinder down as it will draw off the Acetone.
2, Don't draw it off at too high a volume as it will also draw off Acetone.
3, Don't use it at a greater depth than 1 metre when submerged under water.

Nothing about freezing or Copper.

Re: you shouldn't allow an acetylene tank to freeze? [Re: Ducman] #4469578
07/25/17 04:02 AM
07/25/17 04:02 AM
Joined: Jan 2007
Posts: 17,501
Clovis, CA
Merkava_4 Offline
Merkava_4  Offline

Joined: Jan 2007
Posts: 17,501
Clovis, CA
Originally Posted By: Ducman
Copper.
That's a new one on me.
They never taught us that in college.

Three things come to my mind that we were taught.
1, Don't lay the cylinder down as it will draw off the Acetone.
2, Don't draw it off at too high a volume as it will also draw off Acetone.
3, Don't use it at a greater depth than 1 metre when submerged under water.

Nothing about freezing or Copper.


They didn't mention anything about setting the pressure regulator to 5 psi did they ?

Re: you shouldn't allow an acetylene tank to freeze? [Re: Merkava_4] #4469629
07/25/17 06:13 AM
07/25/17 06:13 AM
Joined: Mar 2013
Posts: 496
Australia
Ducman Offline
Ducman  Offline

Joined: Mar 2013
Posts: 496
Australia
Originally Posted By: Merkava_4
Originally Posted By: Ducman
Copper.
That's a new one on me.
They never taught us that in college.

Three things come to my mind that we were taught.
1, Don't lay the cylinder down as it will draw off the Acetone.
2, Don't draw it off at too high a volume as it will also draw off Acetone.
3, Don't use it at a greater depth than 1 metre when submerged under water.

Nothing about freezing or Copper.


They didn't mention anything about setting the pressure regulator to 5 psi did they ?



It doesn't ring a bell.
We don't work in PSI here anyway, that is unless one is inflating tyres or working with compressed air in general.

Besides where I did my time we never used Acetylene as it's best suited for welding due to the higher temperature it burns at so we only used it at college for Oxy Welding and a very little bit of cutting. Come to think of it the only time one would be drawing Acetylene off at or near maximum would be pre heating and or Oxy welding Cast iron by Brazing or Fusion welding
In our workplace all our work was exclusively cutting with Propane which was more economical for high speed(at the time). No Oxy welding of any description.
We often found that welding Cast iron was best done with Cast craft electrodes or Stainless steel electrodes.

The dedicated Acetylene gas regulators have a red zone to indicate the maximum limit one could draw it off at so it was safe. In that case there was no need to be concerned about specific values.

The equation changed drastically when Propane became more expensive.
Then a little later on everybody was changing over to Plasma cutting anyway which had a different set of issues.
Later it changed to HD Plasma cutting for some applications where one required a better finished cut edge.
Now days it's Laser cutting for the thinner stuff, or abrasive water cutting for the really thin stuff where no distortion is required and clients have very deep pockets.

At the end of the day, I'm well and truly out of date.

Last edited by Ducman; 07/25/17 06:21 AM.
Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4469637
07/25/17 06:26 AM
07/25/17 06:26 AM
Joined: Mar 2004
Posts: 21,857
Upstate NY
Donald Offline
Donald  Offline

Joined: Mar 2004
Posts: 21,857
Upstate NY
Everything freezes at some point. However that may not happen on earth naturally. Lowest temp ever recorded was -89.2C and that is above the freezing point of acetone.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4469689
07/25/17 07:26 AM
07/25/17 07:26 AM
Joined: May 2005
Posts: 2,309
Toronto, Canada
George7941 Offline
George7941  Offline

Joined: May 2005
Posts: 2,309
Toronto, Canada
My acetylene tank has been stored in my unheated backyard shed for the last thirty five years and there has been zero issues with freezing. The tank always works when I need it, even in winter.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4470252
07/25/17 05:31 PM
07/25/17 05:31 PM
Joined: Sep 2016
Posts: 1,418
Minnesota
bioburner Offline
bioburner  Offline

Joined: Sep 2016
Posts: 1,418
Minnesota
Well the likelihood of the acetylene tanks freezing in the real world is pretty much zero.
Look up copper reacting with acetylene. That's why one never sees the gas plumbed around with copper pipe that and the fact it should never go above 15 psi. Look at the gauge set for it and the red zone is at 15 plus.
My father wore two hats, one was a master welder and the other was for blasting and taught explosives in the military. One way or the other its going to go down:)



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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4470271
07/25/17 05:51 PM
07/25/17 05:51 PM
Joined: Mar 2013
Posts: 969
Florida
laserred96gt Offline
laserred96gt  Offline

Joined: Mar 2013
Posts: 969
Florida
Never heard anything about freezing when I went to school ( Florida ), instructors did mention not to lay them down, 5 psi on acetylene 20 on oxygen for HVAC copper soldering.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4471910
07/27/17 11:54 AM
07/27/17 11:54 AM
Joined: Jan 2009
Posts: 14,127
Illinois
tig1 Offline
tig1  Offline

Joined: Jan 2009
Posts: 14,127
Illinois
I worked in a machine shop for 24 years and all of our gas (including acetylene) was stored in an unheated shed, sometimes in temps down to -10F. Never had a problem. The gas company was the ones that put the gas in our shed. However, we had to store the oxy in a different shed (unheated) for safety reasons. We got hit by OSHA for that one.


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Re: you shouldn't allow an acetylene tank to freeze? [Re: tomcat27] #4473163
07/28/17 03:58 PM
07/28/17 03:58 PM
Joined: Apr 2005
Posts: 357
CT
CrAlt Offline
CrAlt  Offline

Joined: Apr 2005
Posts: 357
CT
Originally Posted By: tomcat27
I am looking at purchasing an oxy/acetylene setup and was reading safety info on the like. I was surprised that it said to not store an acetylene tank below freezing - that the acetone in the tank could separate and theoretically be unsafe. is this true? I certainly don't want to bring the tank inside in the winter!


Are you planning on welding with it? If not then I would look in to oxy/propane. For cutting, heating, brazing it works just fine with less hassle. Can use cheap BBQ tanks.


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