View Full Version : Converting A Propane Tank For Compressed Air

04-13-2009, 10:38 AM
I was wondering if anyone has done this, and if the propane smell was completely eliminated. My brother made one, but i'm not sure if he cleaned it out properly because the compressed air coming out if it stunk like propane still.

I've got a tank from when my old Dak was on LPG, I'd like to change it over to a compressed air tank.:confused0006:

dirka dave
04-13-2009, 10:40 AM
There are kits available at autopart stores, quite easy to do and is not too expensive..

m j
04-13-2009, 10:53 AM
propane is odourless.
they add stuff to make it stink.
I would fill the tank with water to fully displace the gas out of it before using it as an airtank
doesnt really matter if it smells

04-13-2009, 10:58 AM
Just light your torch and jam it down the filler hole. That'll clean it out real fast

04-13-2009, 01:43 PM
doesnt really matter if it smells

Sure it does, have you ever used one that smells? It's awful.

You have to wash them out with soapy water, to clarify, I was wondering if it was possible to clean them enough to get rid of the stench.

04-14-2009, 05:08 PM
filling it with water usually gets the ethyl mercaptan smell out. You could always febreze it :p

04-14-2009, 05:27 PM
ive heard rumors that they use an additive in automotive propane that leaves a bit of a slimy substance in the tanks, i coudl be wrong tho
but i was told you can just pull the valves, flip the tank and let it drain out

id say just burn it out tho:party0010:

04-14-2009, 09:27 PM
:D Febreeze...

Well, i'll give it a shot, i'll clean it out good with soapy water several times, and tremclad paint the interior of the tank, and i'll keep anyone who's interested posted.[cheers]

04-14-2009, 09:33 PM
i have always put stones or gravel in tanks to clean tanks but recently a fellow on another board suggested a length of chain. bit of soap ,some water and some cain to scrub it when it is aggitated should work. barring that you can burn it out. do not tremclad the inside of the tank. when the paint flakes and it will you will have issues

04-15-2009, 07:29 AM
I heard of the tremclad bit by googling the title of this thread. My tank should be ok still because it's half full of propane to begin with, I probably wouldn't need to treat the inside of it, i'm thinking that there won't be any rust inside of it.

04-15-2009, 08:55 AM
if you're lookin for a quick way to get rid ofthe propane use a tiger torch

04-15-2009, 09:04 AM
That's a good idea, I thought of hooking it up to my barbeque, but that could take a few months to empty out. I don't want to be tripping over a 25 gallon barbeque tank all summer.

04-15-2009, 09:43 AM
Maybe you need to use the bbq more...


04-15-2009, 03:49 PM
whats the pressure on the compressed air, that matters as well.

I can't see how thats safe since air can give a static charge and blow you the fuck up if there are and propane vapours left.

04-15-2009, 04:42 PM
Compressed air wouldn't be more than 125 psi, most compressors won't go past that anyways, the psi of a propane tank is up over 200.

There wouldn't be any propane gas vapours left, because the valve has to be changed out for a compressed air setup. The smell sure will be there though, i'd like to avoid that. :)

I think that it'll be a good setup, since the propane tank has a frame and will be bolted to the truck properly.

04-15-2009, 05:20 PM
I used a propane tank for air and no, the rotten smell never left. I sold it .

04-15-2009, 06:06 PM
im pretty sure propane is stored at 1500psi, making tanks rated for 3000?

04-15-2009, 07:52 PM
If I can remember propane cylinders (portable like bbq) are rated @ 250psi. Propane tanks (solid mounted in a vehicle) are rated @ 300 psi. Just put a pressure relief valve in there and it will be fine.

04-15-2009, 08:22 PM
If I can remember propane cylinders (portable like bbq) are rated @ 250psi. Propane tanks (solid mounted in a vehicle) are rated @ 300 psi. Just put a pressure relief valve in there and it will be fine.

did some googling, that sounds better