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Posted: 2/10/2015 5:55:30 PM EDT
[#1]
Quote HistoryQuoted: Is there a specific thread on converting propane tanks? I am shopping for a couple of 500s now. |
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Posted: 2/10/2015 7:58:37 PM EDT
[#2]
Haven't decided I have a pump and gravity tanks now but want better long term storage.
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Posted: 2/11/2015 10:08:17 AM EDT
[#3]
Expy;
I don't think anyone has mentioned water heater pressure relief valves but is seems that they relieve on pressures of ~150 psig. or 1/10th of the failure pressure of the tank in the video (I think they also relieve on temperatures above about 210 degrees F). They are common/cheap devices. The only question might be how to they fare in a hydrocarbon environment as they are designed for water... Installing one would, of course, be a custom fabrication job but it might be doable relatively easily... Food for thought...  - $10 online
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Posted: 2/13/2015 4:50:27 PM EDT
[#4]
6 posts down...
Good thinking! 
And I compliment you on your READING COMPREHENSION! 
Storing gasoline Filling tanks... FIlling Propane Tanks incl equip needed |
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Posted: 2/13/2015 9:33:35 PM EDT
[#5]
Expy;
Another pressure relief idea >>> < $10 @ Amazon Brand Name Kingston Valves Connector Type NPT Male LowerTemperature Range -40 Degrees Fahrenheit Manufacturer Series Number 128A Series Material Type Brass Maximum Inlet Pressure 75 PSI Maximum Working Pressure 75 PSI Number of Items 1 Overall Height 1-1/16 inches Part Number 128A-1-075 Seat Material Type Brass Size Name 1/8" Style Name Threaded System of Measurement Inch UNSPSC Code 40141606 Upper Temperature Range 225 Degrees Fahrenheit Amazon description >> Kingston Model 128A Low Profile Safety Valve is a pop-style safety valve constructed from brass and feature a Buna-N Disc on a brass seat. The Model 128 series is a low profile, low flow valve. Pull-Ring Option (128AP), Toggle Option (128AT) and Viton option (128AF) available. Set pressure range 5 to 200 psi (5 psi increments only). Maximum temperature -40°F to 225°F. Other pressure relief valves at Amazon > One / Two / Three 
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Posted: 2/13/2015 9:49:00 PM EDT
[#6]
Good idea...
I've suggested using a PVC pipe cap or other similar fitting, with a surface of it sanded down, for a burst pressure of maybe 30 psi. Alternatively a 'fusible' insert could be incorporated into the plastic fitting, one obvious issue is the effect of the gasoline components on the 'fusible' material used. Possibly a thin Viton or Teflon disk cut from a sheet and sandwiched between PVC fittings would make an acceptable means to your 'burst disk' proposal. In any case, putting gasoline into a high pressure vessel without some sort of low pressure relief mechanism... Is nutz IMHO. But there are plenty of folks capable of it. 
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Posted: 2/13/2015 10:03:50 PM EDT
[#7]
Above post edited during your reply.... sorry... look again!
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Posted: 2/13/2015 10:09:34 PM EDT
[#8]
I enjoyed reading this.
What you guys want to put on your tanks are called "Conservation vents" |
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Posted: 2/13/2015 11:44:03 PM EDT
[#9]
Quote HistoryQuoted:
Above post edited during your reply.... sorry... look again! Thanks for the additional links Reorx. One thing needed to be sure of is that the relief valve has sufficient capacity for the potential conditions it may be required to function under. |
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Posted: 2/13/2015 11:46:07 PM EDT
[#10]
Quote HistoryQuoted:
I enjoyed reading this. What you guys want to put on your tanks are called "Conservation vents" Yes, but these look expensive... A week's ? Prepper wages... They certainly look to have the capacity. C-V's |
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Posted: 2/17/2015 8:16:59 PM EDT
[#11]
This week picked up two hot water heaters for fuel storage.
One tall and one short. They have a lot of loose granular material in the bottom that look like vermiculite. Or baby kidney stones
Had my last K-S the last year before I started drinking RO water.
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Posted: 2/17/2015 10:57:03 PM EDT
[#12]
I'm just here for the post count and more Dido elevator music.
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Posted: 2/18/2015 12:32:49 AM EDT
[#13]
Quote HistoryQuoted:
This week picked up two hot water heaters for fuel storage.
One tall and one short. They have a lot of loose granular material in the bottom that look like vermiculite. Or baby kidney stones
Had my last K-S the last year before I started drinking RO water.
If your water is hot, why do you have a need to heat it?
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Posted: 2/18/2015 12:34:27 AM EDT
[#14]
Quote HistoryQuoted:
If your water is hot, why do you have a need to heat it?
Quote HistoryQuoted:
Quoted:
This week picked up two hot water heaters for fuel storage.
One tall and one short. They have a lot of loose granular material in the bottom that look like vermiculite. Or baby kidney stones
Had my last K-S the last year before I started drinking RO water.
If your water is hot, why do you have a need to heat it?
To get moar...
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Posted: 4/16/2015 6:37:23 PM EDT
[#15]
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Posted: 4/16/2015 6:55:38 PM EDT
[#16]
Quote HistoryQuoted:
Here's another video of a propane tank, presumably filled w/ propane with a fire lit under it for demonstration purposes. There is a blue area with 'bubbles; photo shopped on the tank, illustrating the mechanism of what we're talking about. You can see the vapor being released in bursts, and the vapor pressure activating the valve due to the fire is probably in the several hundred psi range. Note that when the safety valve opens, there is a TREMENDOUS cooling effect due to the expanding propane. That's what causes the cycle to repeat a couple times until the metal gets hot enough to fail ----below the calibration of the safety valve, then in the video, all hell breaks loose when the tank ruptures. At about 1:30 Look at the shock wave... And the resulting fuel-air splocion
We'd need to look up the vapor pressure of gasoline to try to see what would happen if gasoline were substituted for propane. My guess- since the vapor pressure at STP of gasoline is way lower than propane, the temperature that a tank filled with gasoline would have to reach before the safety valve activated, would be considerably higher. The question is, would the safety valve operate more effectively w/ gasoline than with propane... And would the higher temps reached by the tank cause it to rupture before the safety valve vented. Video of propane tank failing... What Seek2 mentions happening is at 1:30 in the video... 
I think it would singe the eyebrows any chickens nearby.
Youtube video of Tank  http://www.youtube.com/watch?v=UM0jtD_OWLU
This is why I have always advocated here putting an adequate pressure relief valve on 'stronger' higher burst pressure tanks, that fuel might be stored in. Neat! |
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