Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
700 Barrel Removal at Standstill
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Susquatch" data-source="post: 2133012" data-attributes="member: 31264"><p>I cannot endorse this idea. </p><p></p><p>At sea level pressure, propane is a liquid at -44F, while dry ice can be different temperatures (because it is not a liquid) but is reliably below -100F. So dry ice is a LOT colder than liquid propane. </p><p></p><p>When I was doing low temperature testing of propane properties (seems like a million years ago now), we carried liquid propane around in a pail at -50. Just like water can be carried in a pail at temperatures below 212F. Very Cool! That said, propane used for recreational purposes isn't usually very pure. So temperatures can vary and some other liquified petroleum gases can boil off at different temperatures. </p><p></p><p>At any rate, propane under these conditions isn't very safe (as you noted) and isn't worth the risk. Not only is it highly flammable but the gas boiling off the frigid liquid is also heavier than air and can find its way into places you would never think it could. </p><p></p><p>In my opinion, because it's so much colder and also because it is so much safer, our friend is better off using dry ice even if he does have to travel a bit. </p><p></p><p>If interested in trying something like that but more readily available, get some "super cool" (or whatever they carry) from your local electronics supply store. It is sorta like freon (without the flourocarbons) and is used to test bad connections on circuit boards. You can just spray it on to cool whatever it is you are working on. Many of these much safer products have boiling points lower than propane does - but I have no specifics handy.</p></blockquote><p></p>
[QUOTE="Susquatch, post: 2133012, member: 31264"] I cannot endorse this idea. At sea level pressure, propane is a liquid at -44F, while dry ice can be different temperatures (because it is not a liquid) but is reliably below -100F. So dry ice is a LOT colder than liquid propane. When I was doing low temperature testing of propane properties (seems like a million years ago now), we carried liquid propane around in a pail at -50. Just like water can be carried in a pail at temperatures below 212F. Very Cool! That said, propane used for recreational purposes isn't usually very pure. So temperatures can vary and some other liquified petroleum gases can boil off at different temperatures. At any rate, propane under these conditions isn't very safe (as you noted) and isn't worth the risk. Not only is it highly flammable but the gas boiling off the frigid liquid is also heavier than air and can find its way into places you would never think it could. In my opinion, because it's so much colder and also because it is so much safer, our friend is better off using dry ice even if he does have to travel a bit. If interested in trying something like that but more readily available, get some "super cool" (or whatever they carry) from your local electronics supply store. It is sorta like freon (without the flourocarbons) and is used to test bad connections on circuit boards. You can just spray it on to cool whatever it is you are working on. Many of these much safer products have boiling points lower than propane does - but I have no specifics handy. [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Gunsmithing
700 Barrel Removal at Standstill
Top