Spike Brewing 12.5 Conical Fermenter Giveaway!

Home Brew Forums > Home Brewing Beer > All Grain & Partial Mash Brewing > Propane Tank Math Equation

Reply
 
LinkBack Thread Tools
Old 10-15-2009, 04:29 PM   #1
Lodovico
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: PA
Posts: 916
Liked 10 Times on 7 Posts
Likes Given: 9

Default Propane Tank Math Equation

I'm still a little new to the whole propane tank brewing and I wanted to make sure I understand this. I'm trying to tell how much I have left in my tank.

Here's the info:

I have an Ameri-Gas Tank that says Net Weight- 15 pounds on front of tank

The Tare Weight on the handle of the tank says 17 pounds

I just weighed the tank and it weighs 26 pounds even.

How much propane do I have left??? Thanks!

__________________
Lodovico Brewing Co.




On Draft: Mild
On Draft: IPA
On Draft: Belgian Pale Ale
In Bottle: Brett Porter
In Bottle: Flanders Red
In Bottle: Oud Bruin
Fermentor: Biere De Garde
Fermentor: Belgian Amber Ale
Lodovico is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 04:50 PM   #2
Catt22
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Posts: 4,998
Liked 57 Times on 55 Posts
Likes Given: 51

Default

You have 9 lbs remaining in the tank. The Tare Weight is the empty weight of the container. The net weight is the weight of the contents. In this case your supplier is saying that 15 lbs is what the contents should be for a full tank. Normally, the 20 lb propane tanks hold 20 lbs of propane when full. The exhange places have been playing a shell game lately and only fill the tanks 3/4 full, or 15 lbs. This is a scam IMO. The suppliers claim they are doing this so that they don't have to raise the price. Duh? So, we get screwed out of 25% of the fuel and are required to fill the tanks more frequently. I guess they figure our time and effort are worth nothing to us.

The calculation is simply to subtract the tare weight from the total weight to arrive at the remaining gas weight. ie 26-17=9

It would weigh 32 lbs when filled with 15 lbs and 37 lbs if filled with the max 20 lbs.

To avoid this, take your empty tank to a refill station if you have one near where you live and they will normally give you a true fill of 20 lbs. You may also discover that the price will be lower than the exchange price. I get 20 lb fills for roughly $20 currently. I am surprised and disappointed that the state bureau of weights and measures has not come down hard on the tank exchange people, but they have found a loop hole by putting up a sign saying that the net weight is 15 lbs for their tanks. It's still pretty slimy IMO and I refuse to give them my business. The average idiot on the street is usually too stupid to realize they are getting screwed and it's pretty obvious some in the government are getting kick backs somehow. You can bet on it.

__________________
Catt22 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 04:54 PM   #3
SOB
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2006
Location: Delaware, OH
Posts: 975
Liked 5 Times on 5 Posts

Default

Wow, Catt...I never paid attention to the whole 15lbs vs 20lbs filling. I have noticed recently that my tanks dont last as long. I've also wondered why someone would go through the pain of taking a tank to get filled when it is the same price to exchange it and less hassle. Make sense...unfortunately there are no spots that fill tanks around here.

Good info...

__________________
"So we were slammin' beers in the church parking lot..."

"I'm much too young to feel this damn old"
SOB is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 04:59 PM   #4
wildwest450
Feedback Score: 0 reviews
Recipes 
 
Join Date: Dec 2007
Posts: 9,099
Liked 164 Times on 149 Posts
Likes Given: 4

Default

And if you use blue rhino you are getting raped. I fill my own tanks, have been for years, and those blue rhino tanks do not hold #20lbs.

__________________
wildwest450 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:01 PM   #5
Lodovico
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: PA
Posts: 916
Liked 10 Times on 7 Posts
Likes Given: 9

Default

Thanks Catt. Good information here.

So I should have plenty left to do at least 2 more 60 minute boils if I heat the mash and sparge water on my stove, right??

__________________
Lodovico Brewing Co.




On Draft: Mild
On Draft: IPA
On Draft: Belgian Pale Ale
In Bottle: Brett Porter
In Bottle: Flanders Red
In Bottle: Oud Bruin
Fermentor: Biere De Garde
Fermentor: Belgian Amber Ale
Lodovico is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:10 PM   #6
Schnitzengiggle
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2009
Location: Tucson, AZ
Posts: 2,664
Liked 29 Times on 22 Posts
Likes Given: 16

Default

Does anyone know how many gallons of LP make ~20#, I have my tanks filled for the same reason, it is about $30 after tax with an exchange here, and it costs me about 15 bucks or so to have my tank filled, normally I don't allow them to run dry, but when I have them filled they will take about 4 gallons give or take. Does 4 gallons equal ~20# of LP?

__________________
follow me @ Broken Glass Brewery

Okham's Razor - simplest explanation is usually the correct one.

My DIY Kegerator - My DIY Fermentation Chamber - My DIY Portable Pump Box
Schnitzengiggle is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:14 PM   #7
Catt22
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Posts: 4,998
Liked 57 Times on 55 Posts
Likes Given: 51

Default

Quote:
Originally Posted by HarryHood1 View Post
Thanks Catt. Good information here.

So I should have plenty left to do at least 2 more 60 minute boils if I heat the mash and sparge water on my stove, right??
Yes, but it might be close. A lot depends on your burner design and how you use it. It's possible to waste a lot of propane by turning the burner up higher than necessary. Some burners are more efficient than others. I have multiple propane tanks so always have a backup on hand. The damn things seem to accumulate. Someone's always giving me one and I occasionally find one discarded at the curb or buy them for a few bucks at garage sales. I think I have seven at the moment and I didn't buy any of them at retail price. I make a run with four at a time when I get them filled.

It's a real drag to run out of gas in the middle of a brew session. You should do some more looking for a bulk propane supplier. I'm almost sure there is one somewhere in your area.
__________________
Catt22 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:21 PM   #8
Catt22
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Posts: 4,998
Liked 57 Times on 55 Posts
Likes Given: 51

Default

Quote:
Originally Posted by Schnitzengiggle View Post
Does anyone know how many gallons of LP make ~20#, I have my tanks filled for the same reason, it is about $30 after tax with an exchange here, and it costs me about 15 bucks or so to have my tank filled, normally I don't allow them to run dry, but when I have them filled they will take about 4 gallons give or take. Does 4 gallons equal ~20# of LP?
The specific gravity of propane is about .495 which equates to roughly 4 lbs per gallon. It will vary some depending on the temperature, but that should be close enough for our purpose. So, your four gallons would be about 16 lbs. which indicates you still had about four lbs in the tank when you had it filled. The fill stations usually weigh the tanks when filling them in order to avoid overfilling. This is the other advantage of getting refills. Normally, the fill stations only charge you for what they put in the tank. The exchange places don't allow credit for any gas remaining in the exchanged tank. This is a PIA for some as you must run your tank completely dry before you exchange it or you get additionally screwed.
__________________

Last edited by Catt22; 10-15-2009 at 05:30 PM.
Catt22 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:29 PM   #9
Catt22
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jan 2009
Posts: 4,998
Liked 57 Times on 55 Posts
Likes Given: 51

Default

Quote:
Originally Posted by SOB View Post
Wow, Catt...I never paid attention to the whole 15lbs vs 20lbs filling. I have noticed recently that my tanks dont last as long. I've also wondered why someone would go through the pain of taking a tank to get filled when it is the same price to exchange it and less hassle. Make sense...unfortunately there are no spots that fill tanks around here.

Good info...

I just used the googles for "Propane Delaware Ohio" and came up with quite a few propane suppliers in your area. Here's one:

Delaware Rental Center
1050 Bowtown Rd, Delaware, OH
(740) 369-9661

and another:

Alum Creek RV & Marine
5742 State Route 37 E
Delaware, OH 43015
740-363-4068

There are some others also.
__________________
Catt22 is offline
 
Reply With Quote Quick reply to this message
Old 10-15-2009, 05:39 PM   #10
Lodovico
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2009
Location: PA
Posts: 916
Liked 10 Times on 7 Posts
Likes Given: 9

Default

So I just called a propane place in town and they refill tanks for $1 per pound.

Is this a decent price for propane refills??

__________________
Lodovico Brewing Co.




On Draft: Mild
On Draft: IPA
On Draft: Belgian Pale Ale
In Bottle: Brett Porter
In Bottle: Flanders Red
In Bottle: Oud Bruin
Fermentor: Biere De Garde
Fermentor: Belgian Amber Ale
Lodovico is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Propane Tank for CO2? pizzaman Bottling/Kegging 3 03-02-2009 03:49 PM
Propane Tank WeHeavy Equipment/Sanitation 5 04-24-2008 03:16 PM
Where do I get a propane tank? ChrisS Equipment/Sanitation 23 10-12-2007 09:35 PM
propane tank grrtt78 Equipment/Sanitation 15 03-03-2007 04:17 PM
propane tank Born Brewing Co. All Grain & Partial Mash Brewing 13 08-10-2005 02:09 AM