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Old 07-22-2018, 01:12 PM   #1
Jeremy7306
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Default Turning propane tank into smoker?

So I have a large propane tank that is no longer used. It used to be only for a hot tub heat pump. I assume a used propane tank can be used for a smoker, but I read that can be quite dangerous cutting a used one. The tank just sits in my back yard, so Iím just looking for advice on what I can do with it really, any is appreciated!


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Old 07-22-2018, 01:31 PM   #2
JakeGraves
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Fill it with water and then cut it.
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Old 07-22-2018, 01:40 PM   #3
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Fill it with water and then cut it.
I filled one with soap and water, and then emptied it. Still had the smell of the propane agent. I was still Leary of cutting it. It got put behind the barn and itís been sitting about 4 years now. Itís probably good now
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Old 07-22-2018, 02:12 PM   #4
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I filled one with water after it had been sitting with the valve pulled out for a couple of years.

Started with a torch and I guess steam built up and it "burped" and I about passed out

Switched to 4.5" grinder with cutoff wheel and didn't look back

Fill with water or run a hose from exhaust and fill it with CO
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Old 07-22-2018, 02:25 PM   #5
sqiggy
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Forget all that water stuff. Remove all the valves. Find some of that hay bailin twine, about 15 to 20ft, soak with lighter fluid, stick about 3ft of it down in the tank and then lite the other end, like a fuse!!!
And video please!!!
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Old 07-22-2018, 02:27 PM   #6
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Forget all that water stuff. Remove all the valves. Find some of that hay bailin twine, about 15 to 20ft, soak with lighter fluid, stick about 3ft of it down in the tank and then lite the other end, like a fuse!!!

And video please!!!


I donít think Iíll be doing it this way

Maybe I should just sell the thing!


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Old 07-22-2018, 02:41 PM   #7
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Maybe I should just sell the thing!


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Sell it and buy you some pipe instead. Trust me, I've built one and will never do another one from a propane tank again. Propane tanks are rolled metal. When you cut the doors out or anything else, nothing will fit right.
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Old 07-22-2018, 02:46 PM   #8
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In all seriousness it can be scary to cut into one but take all the valves off and fill it full of soap and water, we do this a couple of times just for safe measure then we will cut into them with an angle grinder. If not using a cordless just take note of the water coming out and the electricity. You will be fine, just be cautious and if you are really worried just fill it with water a few times and put it in a brush pile fire and let er rip!
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Old 07-22-2018, 03:41 PM   #9
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Aaron Franklin, the bbq guru, has a 30 minute minute show where he constructs one from a propane tank. Very informative in how he cuts the doors so they do fit correctly. Also, good advise on how to install the pipe riser and food tray locations. The series was called BBQ with Franklin, on PBS.
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Old 07-22-2018, 04:21 PM   #10
cattlelackranch
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Fill with water and cut.
Liquid propane is close to oderless.
The lingering smell is the sulphur they add to LP. Once you purge the tank once your fine.
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Old 07-23-2018, 11:22 AM   #11
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The smell is actually mercaptan and it lingers forever!!! A little goes a LONG way!! We use it to odorize our NG at work. We runa 2 burner furnace (20'diameter and about 80'-100' long) at 2000 degrees 24/7. The NG line is 1.5" to each burner! We use about 18 gallons of mercaptan a year!

As for cutting the tank, filling it with water is the best way to go. The water pushes any residual NG out. Or you could do a nitrogen purge, but water is easier and much cheaper!

And to the person who said to hook it to your exaust and fill with CO, CO is a flamable gas!! We have CO analyzers on some of our equipment to shut them down and prevent explosions!!

Guns have only two enemies: rust and politicians!
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Old 07-23-2018, 12:14 PM   #12
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Yep, fill with soap & water and let sit for a day or so and go at it with an angle grinder. Here'a link to my DIY propane tank build: http://discussions.texasbowhunter.co...d.php?t=640761
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Old 07-23-2018, 12:31 PM   #13
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.Name:  20180610_171413.jpg
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The fish are biting. And there's hogs to be kilt. Gotta go!
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Old 07-23-2018, 12:37 PM   #14
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Quote:
Originally Posted by Texas Grown View Post
.Attachment 916829

The fish are biting. And there's hogs to be kilt. Gotta go!
You should hire a welder to finish that for you
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Old 07-23-2018, 12:48 PM   #15
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Still trying to figure out this trick photography TG.
That SMOKER looks massive.
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Old 07-23-2018, 01:42 PM   #16
Jeremy7306
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Originally Posted by Texas Grown View Post
.Attachment 916829

The fish are biting. And there's hogs to be kilt. Gotta go!


You doing that one yourself mike??? I might need to hire ya!!


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Old 07-23-2018, 02:51 PM   #17
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Yep Jeremy. It's mine. But haven't had much time to work on it. I'll get it done one of these days.

Jerry, you for hire?

The fish are biting. And there's hogs to be kilt. Gotta go!
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Old 07-23-2018, 02:57 PM   #18
silencer2011
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when cutting out the doors, you have to leave an inch or so at the corners uncut. Let the metal cool down, then finish cutting the corners. if you cut it all in one long run, there is no chance that the doors will fit properly. they will spring.
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Old 07-23-2018, 03:01 PM   #19
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When i cut into the one I built in 07, we put a hose on a 4 wheeler exhaust and into the tank for a few hours. Left it running when we cut it and had no issues at all. Could use pretty much any gas motor except for the newer truck/cars with cats etc on them, lawn mower, ranger etc would work as well.
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Old 07-23-2018, 03:32 PM   #20
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Originally Posted by KDinTX View Post
When i cut into the one I built in 07, we put a hose on a 4 wheeler exhaust and into the tank for a few hours. Left it running when we cut it and had no issues at all. Could use pretty much any gas motor except for the newer truck/cars with cats etc on them, lawn mower, ranger etc would work as well.
See post #11
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Old 07-23-2018, 03:37 PM   #21
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the bowl shaped ends make awesome fire pits.
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Old 07-23-2018, 04:20 PM   #22
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Originally Posted by silencer2011 View Post
when cutting out the doors, you have to leave an inch or so at the corners uncut. Let the metal cool down, then finish cutting the corners. if you cut it all in one long run, there is no chance that the doors will fit properly. they will spring.
I took some round bar and welded it to the backs of the doors as a brace before I parted them off in case there was any residual stress in the material when parting. Pretty much guaranteed that they wouldn't significantly spring on me. I've seen where others have welded the hinges onto the doors prior to parting the doors off to prevent a bad alignment later on
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Old 07-23-2018, 04:51 PM   #23
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Take all the valves out and throw a match on it. It will jump off the ground about a foot but after that you can do anything you want to it.
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Old 07-23-2018, 07:31 PM   #24
Jerry H
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Originally Posted by Texas Grown View Post

Jerry, you for hire?

The fish are biting. And there's hogs to be kilt. Gotta go!

No sir, I do not want you making fun of my welding skills or the lack there of
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Old 07-23-2018, 08:37 PM   #25
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Originally Posted by duckmanep View Post
the bowl shaped ends make awesome fire pits.
You mean something like this?Name:  20180723_193420.jpg
Views: 158
Size:  105.1 KB

The fish are biting. And there's hogs to be kilt. Gotta go!
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Old 07-24-2018, 12:10 AM   #26
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I let a young weldor use my shop for his projects and he was cutting a propane tank for a smoker last year. He called me and said he had a problem. I went to the shop and he had cut the hole in the fire box end and water ran out. He cut the other end for the smoker part and no water ran out even though it was quite a bit lower. He couldn't under stand why the water didn't come out. Turns out there was a divider in the tank so liquid propane could be taken out of one end. If it had any propane in that half, the water wouldn't have made any difference and it would have blown up.
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Old 07-24-2018, 09:11 AM   #27
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Quote:
Originally Posted by JonBoy View Post
I took some round bar and welded it to the backs of the doors as a brace before I parted them off in case there was any residual stress in the material when parting. Pretty much guaranteed that they wouldn't significantly spring on me. I've seen where others have welded the hinges onto the doors prior to parting the doors off to prevent a bad alignment later on
Weld the hinges on before finishing out the cut is what we did for my pit at the house. We also would only cut 90+/-% of each run. Basically leaving it tacked in a few areas. Then let the metal cool and came back later to finish out the cuts. Flat bar lined on the inside or outside (personal preference) will help with seal of finished product bc it wont be perfect.
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Old 07-24-2018, 09:16 AM   #28
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Originally Posted by stickemhard3 View Post
Weld the hinges on before finishing out the cut is what we did for my pit at the house. We also would only cut 90+/-% of each run. Basically leaving it tacked in a few areas. Then let the metal cool and came back later to finish out the cuts. Flat bar lined on the inside or outside (personal preference) will help with seal of finished product bc it wont be perfect.
This is what I did...I welded skirts on the doors with flat bar and it covered the kerf and sealed it nicely.
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