20 # Bottle

SteveO123 · 07-10-2017, 06:39 PM

Last time i got Blue Rhino they advertised it as 15#. I thought I was getting ripped off but maybe it was just truth in advertising! And it was actually on the 4th of July last year, 2/3 of the way into the cookout! Be prepared! I learned my lesson and keep the spare "full" or at least 3/4!

SIKSUKR · 07-11-2017, 09:47 AM

Here is a real thorough explanation. Cant confirm if its correct but it seems reasonable.
http://modernsurvivalblog.com/preps/...ank-really-is/

DickR · 07-11-2017, 10:42 AM

Let's examine the numbers on that URL Siksukr cited. The WC (water capacity) of the tank shown is 47.6 lb of water, specific gravity 1.0 at room temperature. At 77 F, propane's density is 0.493 (https://en.wikipedia.org/wiki/Propane). Full of propane, the contents would weigh 47.6 * 0.493/1.0 = 23.47 lb. The 42% of WC regulation would allow for 20.0 lb, which is 85% of propane capacity. The numbers all agree.

upthesaukee · 07-11-2017, 02:22 PM

Quote:

Originally Posted by SteveO123

Last time i got Blue Rhino they advertised it as 15#. I thought I was getting ripped off but maybe it was just truth in advertising! And it was actually on the 4th of July last year, 2/3 of the way into the cookout! Be prepared! I learned my lesson and keep the spare "full" or at least 3/4!

I had a friend who had Blue Rhino tank exchange at his store. When I said that could come in handy if I ran out when the refill stations were closed (he was opened until 9pm). He told me how Blue Rhino was only filled with 15 lbs, and if I ever did run out, grab a tank at his house because BR was a ripoff. What seems like a good idea on the isn't.
Dave

Sent from my SM-T580 using Winnipesaukee Forum mobile app

bilproject · 07-12-2017, 09:07 AM

The screw the filler opened is an outage gauge. It is connected to a tube in the valve that goes down to the 85% level. Gas will come out at first and when liquid reaches the end of the tube a white fog will appear out of the small hole to the outside of the valve telling the filler that the tank is full. However, all 20# tanks that are legal to fill today have an auto stop fill feature that will stop the filling at 85% or less. Sort of an idiot proof system to prevent overfills which could cause the relief valve to open if the tank became liquid full and the pressure inside reached 250 psi. There is never air in a propane tank except when new. a new tank must be purged of air before filling. If air and gas were mixed it could explode although unlikely as propane's range of flammability is about 1.9 to 2.4%.

07-11-2017, 09:47 AM	#2
SIKSUKR Senior Member Join Date: Apr 2004 Posts: 5,075 Thanks: 215 Thanked 903 Times in 509 Posts	Tanks are limited to 42% of liquid weight Here is a real thorough explanation. Cant confirm if its correct but it seems reasonable. http://modernsurvivalblog.com/preps/...ank-really-is/ __________________ SIKSUKR

07-10-2017, 06:39 PM	#1
SteveO123 Senior Member Join Date: Jul 2010 Location: Laconia, Lake Opechee Posts: 187 Thanks: 286 Thanked 90 Times in 48 Posts	Last time i got Blue Rhino they advertised it as 15#. I thought I was getting ripped off but maybe it was just truth in advertising! And it was actually on the 4th of July last year, 2/3 of the way into the cookout! Be prepared! I learned my lesson and keep the spare "full" or at least 3/4!

07-11-2017, 10:42 AM	#3
DickR Senior Member Join Date: Apr 2008 Location: Moultonborough Posts: 751 Thanks: 4 Thanked 259 Times in 171 Posts	Let's examine the numbers on that URL Siksukr cited. The WC (water capacity) of the tank shown is 47.6 lb of water, specific gravity 1.0 at room temperature. At 77 F, propane's density is 0.493 (https://en.wikipedia.org/wiki/Propane). Full of propane, the contents would weigh 47.6 * 0.493/1.0 = 23.47 lb. The 42% of WC regulation would allow for 20.0 lb, which is 85% of propane capacity. The numbers all agree.

07-12-2017, 09:07 AM	#5
bilproject Senior Member Join Date: Oct 2007 Location: Bear Island/Fort Myers, Fla Posts: 230 Blog Entries: 1 Thanks: 1 Thanked 59 Times in 41 Posts	The screw the filler opened is an outage gauge. It is connected to a tube in the valve that goes down to the 85% level. Gas will come out at first and when liquid reaches the end of the tube a white fog will appear out of the small hole to the outside of the valve telling the filler that the tank is full. However, all 20# tanks that are legal to fill today have an auto stop fill feature that will stop the filling at 85% or less. Sort of an idiot proof system to prevent overfills which could cause the relief valve to open if the tank became liquid full and the pressure inside reached 250 psi. There is never air in a propane tank except when new. a new tank must be purged of air before filling. If air and gas were mixed it could explode although unlikely as propane's range of flammability is about 1.9 to 2.4%.