**SO THIS IS WHAT I FOUND OUT...** Did you ever plan an RV trip to a remote area and wonder how long the LP gas in your LP cylinders or LP tank would last? If so there is a way there is a way to roughly calculate propane usage.

The first piece of the puzzle is knowing how much propane is in your RV cylinders or tank when full. Remember an RV propane cylinder or tank is full at 80% of its capacity to allow for expansion. Wait until your cylinder or tank is nearly empty and the next time you have it filled ask the attendant how much it holds.

The next step is to multiply your propane container capacity using one of these formulas, (gallons or pounds), to determine the container BTU capacity.

- BTUs per gallon equal 91,502.
- BTUs per pound equal 21,548.

Now, divide your container BTU capacity by the total BTU demand of the LP gas appliances you plan to use. BTU appliance demand can normally be found on the appliance itself, or in the appliance ownerâ€™s manual.

This will give you an idea of how long you can expect your LP gas to last.

**For example:** If your RV propane container holds 14 gallons of LP gas when itâ€™s full, you multiply 14 X 91,502. The result is 1,281,028. Now divide this figure by the total BTU demand of any LP gas appliances you will be using. Letâ€™s say, for the sake of an example, the total BTU demand will be 43,800 BTUs. In this case you would have approximately 29 hours of use before running out of LP gas.

However, keep in mind that the amount of LP gas in the container and varying temperatures will affect these calculations too. This is especially true in cold weather. At temperatures below zero degrees the per hour container BTU capacity will be reduced by 50% or more.

Calculating propane usage can give you a general idea of how long you can use your LP gas fired appliances before needing to find a propane filling station.

RESOURCE :

http://blog.rv.net/2009/1...ulating-propane-usage/ **GAS PIPING INFORMATION** Information: Charts:

Gas Piping Sizing

LIquid Propane Gas Piping Size Chart - Information chart assists in determining Liquid Propane Gas Piping Size in inches (½" to 4") for lengths of pipe in feet (10 feet to 400 feet).

Natural Gas Piping Size Chart - Information chart assists in determining Natural Gas Piping Size in inches (½" to 4") for lengths of pipe in feet (10 feet to 300 feet).

Note: These charts are provided by

Aaladin, a major manufacturer and supplier of

Pressure Washers and

Parts Washers. Industrial Equipment is a certified Distributor for Aaladin.

View a

PDF version of Industrial Equipment Chart for Gas Piping Sizing. Requires

Adobe Reader Liquid Propane (LP) Gas flow is given in thousands of BTU/hr. (This chart refers to low pressure LP, after regulation )

One cubic foot of LP gas = 2516 BTU

Pipe length must include "additional length" for all fittings. Add approximately 5 feet per fitting.

Standard nominal pressure at the burner for Liquid Propane Gas is 11" of water.

Aaladin uses the same orifice for all propane burners: #63

Liquid Propane Example:

A machine with a burner that requires 440,000 BTU would need a 1-¼" pipe for a 20' long run.

Natural Gas flow is given in thousands of BTU/hr.

One cubic foot of Natural Gas = 1000 BTU

Pipe length must include "additional length" for all fittings. Add approximately 5 feet per fitting.

Nominal pressure at the burner for Natural Gas is 3.5" of water. (Typical machine supply 5"-7")

Aaladin uses the same orifice for all propane burners: #52

Natural Gas Example:

A machine with a burner that requires 440,000 BTU would need a 1-¼" pipe for a 20' long run.

RESOURCE:

http://www.industrial-equ...mation/gas-piping.html **The Wild Dog** **" Our Dogs Don't Just Snap, They Bite" ** www.thewilddogcart.com www.facebook.com/thewilddogcart