Results 1 to 13 of 13
  1. #1
    Join Date
    Nov 2004
    Posts
    977

    Propane tanks, gas grille vs forklift

    A buddy of mine, in another state, brought home a fork lift propane tank from the company he works at (and owns), for use on his barbeque grill.

    I'm not sure what piping changes he had to make to hook the tank up to the grill regulator, but he got-er-done.

    The regulator froze up, internally and externally, and the grill caught on fire. My understanding is there was no damage to the grill.

    Are fork lift propane tanks charged to a higher pressure than the propane tanks for a gas grill?

    My thought is both tanks are the same, but I have no idea what pressures, etc. either one is charged to, I've never paid any attention.

  2. #2
    Join Date
    Nov 2004
    Posts
    977
    You learn something new every day. It seems forklifts use liquid propane and their tanks are designed for that. Gas grills use propane vapor.

    propane101.com says my buddy is lucky he didn't blow himself up.

  3. #3
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    Yep forklifts use liquid propane not vapor.

  4. #4
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Ummm......don't gas grilles and forklifts burn propane gas (vapor) while their tanks are filled filled with condensed vapor (liquid)? Don't the propane tanks on my travel trailer and gas grill have a float switch so that they can't be filled with more 80% liquid before it begins to vent to atmosphere?
    The picture in my avatar is of the Houston Ship Channel and was taken from my backyard. I like to sit outside and slap mosquitos while watching countless supertankers, barges and cargo ships of every shape and size carry all sorts of deadly toxins to and fro. It's really beautiful at times.....just don't eat the three eyed fish....

    ¯`·.¸¸ .·´¯`· .¸>÷÷(((°>

    `·.¸¸..· ´¯`·.¸ ¸.·´¯` ·.¸>÷÷(((°>

    .·´¯`· .¸>÷÷(((°>

    LMAOSHMSFOAIDMT

  5. #5
    Join Date
    Dec 2005
    Posts
    117
    Quote Originally Posted by sprintmj19 View Post
    Are fork lift propane tanks charged to a higher pressure than the propane tanks for a gas grill?

    My thought is both tanks are the same, but I have no idea what pressures, etc. either one is charged to, I've never paid any attention.

    Propane is a refrigerant - R290, so it follows the pressure/temperature rules that all refrigerants follow.

    As long as there is some amount of liquid in the tank, the pressure depends on temperature and nothing else. At 55° - 85psi, at 70° - 110psi, at 85° - 140psi

  6. #6
    Join Date
    Jun 2011
    Location
    Houston area
    Posts
    1,493
    Quote Originally Posted by aemeeich View Post
    Propane is a refrigerant - R290, so it follows the pressure/temperature rules that all refrigerants follow.

    As long as there is some amount of liquid in the tank, the pressure depends on temperature and nothing else. At 55° - 85psi, at 70° - 110psi, at 85° - 140psi
    You hit the nail on the head. But, propane is is not necessarily purposed as a refrigerant but can be used as one just as kerosene, gasoline, air (atmosphere) or many other compounds or gases can.

    And to address the conversation in this thread, the tanks are filled with a liquid which presents a vapor pressure at the tank exit if the tank is positioned upright, just like a cylinder of R-22 or whatever. In the case of a gas grill a diaphragm somewhere in the supply hose connected to the tank reduces the tank pressure to a safe level. Also, on your cylinder look for a rupture disc or on a fork lift tank a pressure bleed valve connected to the outlet.
    The picture in my avatar is of the Houston Ship Channel and was taken from my backyard. I like to sit outside and slap mosquitos while watching countless supertankers, barges and cargo ships of every shape and size carry all sorts of deadly toxins to and fro. It's really beautiful at times.....just don't eat the three eyed fish....

    ¯`·.¸¸ .·´¯`· .¸>÷÷(((°>

    `·.¸¸..· ´¯`·.¸ ¸.·´¯` ·.¸>÷÷(((°>

    .·´¯`· .¸>÷÷(((°>

    LMAOSHMSFOAIDMT

  7. #7
    Join Date
    May 2000
    Location
    Rochester, NY, USA
    Posts
    14,287
    Quote Originally Posted by Cooked View Post
    You hit the nail on the head. But, propane is is not necessarily purposed as a refrigerant but can be used as one just as kerosene, gasoline, air (atmosphere) or many other compounds or gases can.

    And to address the conversation in this thread, the tanks are filled with a liquid which presents a vapor pressure at the tank exit if the tank is positioned upright, just like a cylinder of R-22 or whatever. In the case of a gas grill a diaphragm somewhere in the supply hose connected to the tank reduces the tank pressure to a safe level. Also, on your cylinder look for a rupture disc or on a fork lift tank a pressure bleed valve connected to the outlet.
    I was thinking the guy laid the tank down on it's side, thats why he had a problem
    The Last four letters


    American = I Can, Republican = I Can, Democrats = Rats


    any questions

  8. #8
    Join Date
    Mar 2001
    Posts
    1,486
    Motor fuel tanks have a liquid dip tube that puts liquid LPG to the valve. Its either set up for laying on it's side or for stand up use. Either way, it ain't gonna work on a barbeque. Be careful that you didn't rupture the regulator diaphram putting liquid into it.
    One way to outthink people is to make them think you think. They'll think you're not really thinking what you're trying to get them to think you think...........

  9. #9
    Join Date
    May 2000
    Location
    Rochester, NY, USA
    Posts
    14,287
    so there must be a difference between a *standard* 30lb LPG Tank and a LPG tank for motor vehicles.

    I wonder what the insurance company is going to say if he burns down his house by using the wrong tank?
    The Last four letters


    American = I Can, Republican = I Can, Democrats = Rats


    any questions

  10. #10
    Join Date
    May 2007
    Location
    Atlanta area
    Posts
    2,539
    You can fill a grill tank from a forklift tank, if you can find an adapter. If you are EPA certified and you are experienced in proper refrigerant recovery, you should have no problem. Remember to check your tank ratings and certification dates.

    http://www.youtube.com/watch?v=fD6hu...eature=related
    Vacuum Technology:
    CRUD = Contamination Resulting in Undesirable Deposits.
    CRAPP = Contamination Resulting in Additional Partial Pressure.

    Change your vacuum pump oil now.

    Test. Testing, 1,2,3.

  11. #11
    Join Date
    May 2000
    Location
    Rochester, NY, USA
    Posts
    14,287
    Quote Originally Posted by Space Racer View Post
    You can fill a grill tank from a forklift tank, if you can find an adapter. If you are EPA certified and you are experienced in proper refrigerant recovery, you should have no problem. Remember to check your tank ratings and certification dates.

    http://www.youtube.com/watch?v=fD6hu...eature=related
    it just so happens I have an adapter at my Cabin in the Adirondacks. It was another thing that came with the cabin. Now I know how to use it, thanx
    The Last four letters


    American = I Can, Republican = I Can, Democrats = Rats


    any questions

  12. #12
    Join Date
    Jul 2008
    Location
    Denver, CO
    Posts
    4,229
    I was looking at one of those tanks today. All you need to do is pull the valve out cut the dip tube and swap it with the plug in the vapor hole.

  13. #13
    Join Date
    Oct 2009
    Posts
    975
    So that's why my forkin lift tank is always empty!!!!!!!. I swapped it to vapor a few years ago and it does a whole lot better.
    I got new tanks for it when I got it and It kept destroying the valve seat in the regulator. I think because of trapped liquid between the tank valve and the regulator after shutting down and turning off the tank valve.
    Never argue with a crazy man.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event