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Author Topic: How long does propane last?  (Read 5787 times)

fightingquaker13

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How long does propane last?
« on: May 17, 2011, 04:22:14 PM »
I have a supply of bulk propane cylinders (think gas grill size). Some of them are pushing 4 years old. Are they still ok, or do I need to empty and refill them?
FQ13
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Majer

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Re: How long does propane last?
« Reply #1 on: May 17, 2011, 04:36:33 PM »
if they were stored properly they should be fine to use. I would check the date on the containers to make sure they are within their useful life and use up any that are getting close. You can still use them if they are past the date you just cant get them refilled. Hope this helps.
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TAB

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Re: How long does propane last?
« Reply #2 on: May 17, 2011, 04:46:10 PM »
the cylinder life cycle is shorter.
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Pathfinder

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Re: How long does propane last?
« Reply #3 on: May 17, 2011, 05:06:00 PM »
Propane never goes bad. Seals on the cans are a whole 'nuther story though. After only 4 years, the seals should still be OK, but YMMV.
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ellis4538

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Re: How long does propane last?
« Reply #4 on: May 17, 2011, 05:42:46 PM »
Tanks are supposed to be OK for 10 years before needing to be tested but the place I get mine filled said that they check for rough handling and decide...just to be safe!

FWIW

Richard
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Re: How long does propane last?
« Reply #5 on: Today at 07:47:37 AM »
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kmitch200

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Re: How long does propane last?
« Reply #5 on: May 17, 2011, 08:05:13 PM »
Quote from: fightingquaker13 on May 17, 2011, 04:22:14 PM
I have a supply of bulk propane cylinders (think gas grill size). Some of them are pushing 4 years old. Are they still ok, or do I need to empty and refill them?
FQ13

What they said. The cylinder goes bad before the gas does.

Doing a quick search found this:
The most common portable tank is called a "DOT" tank, since it is built to conform to design and usage regulations established by the Federal Department of Transportation. 
DOT tanks may only be used for 12 years after the manufacturing date. (This is according to a standard created by the National Fire Protection Association, and adopted as law by most states).

A 4 year old tank is fine. (excluding damage of course)
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dipisc

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Re: How long does propane last?
« Reply #6 on: May 17, 2011, 08:41:29 PM »
Hi;

     Glad someone asked/posted this question. As a non-active scuba diver, whenever I had to get my tanks hydrostated there was no mention of shelf life on the tank. I thought that propane tanks were the same - good until they could not pass the test sort of thing.
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billt

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Re: How long does propane last?
« Reply #7 on: May 17, 2011, 08:45:17 PM »
How many PSI are they under when they are full?    Bill T.
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TAB

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Re: How long does propane last?
« Reply #8 on: May 18, 2011, 02:09:59 AM »
That depends on temp and if there is liquid in the tank or if its all gas.

at 162 degrees the presure will be 390 psi.  most tanks have a presure release valve at about 375.

at 70 it should be 124 psi.


Then there is storage for transpertation and as fuel for cars/trucks.  thats a whole diffrent animal.
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billt

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Re: How long does propane last?
« Reply #9 on: May 18, 2011, 05:45:35 AM »
So say a 20 pound barbecue grill tank full, when it's 115 outside on the patio is close to what, pressure wise? I ask because I got this thing parked right up against the house. There is no where else to put it.  Bill T.
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