![]() Cold weather often brings confusion and frustration for propane customers concerning perceived propane volume and the actual amount of propane delivered but the reality is this When a propane delivery is made during cold temperatures, the tank gauge will indicate less propane delivered based on the beginning and ending gauge readings but the actual amount of propane delivered, according to a properly calibrated truck meter is what was truly pumped into the tank during the delivery. If the temperature were to rise to 60☏, a properly functioning float gauge would rise to 40%, assuming the tank was empty at the time of delivery. ![]() Using the information from above, a 100 gallon delivery on a cold day (far below 60☏) may indicate less than 100 gallons delivered just by looking at the gauge. Propane users can become quite confused during periods of cold weather following a gas delivery because their propane tank gauge may read less than what they expect it to read. Propane is a liquid and is subject to the same rules of mother nature. As temperatures rise, liquids become less dense and expand. As temperatures fall, liquids become more dense and compact. ![]() If the temperature were to rise by the same respective amount, the gauge would indicate a higher volume of propane but there would still be 424 pounds of propane in the tank. The amount of usable energy has not decreased. Although the propane volume has decreased, the amount of propane has not decreased, it has simply become more compact (dense). Assuming the gauge dial sits between 35% and 40% following the temperature drop, there are still 424 pounds of propane in the tank. If there is a significant temperature drop (over 20☏) the gauge will indicate that there is less propane in the tank. 100 gallons of propane weighs 424 pounds (4.24 lbs.A properly functioning float gauge will read 40%.The industry standard 60☏ is universally recognized as the base reference point for liquid propane volume correction. The following example assumes a 250 gallon propane tank has 100 gallons of propane at 60☏. To understand what's going on with regard to differing tank gauge readings in extreme temperatures (hot or cold), we need to first explain basic principles that affect the liquid propane volume. The volume of any liquid will rise and fall dependent upon temperature. In comparison to other liquids regarding temperature and volume, it is no different. This is extremely important to remember when understanding propane temperature and volume and the relationship between the two. Propane is stored and delivered as a liquid. Being temperature dependent, propane becomes more dense as temperature falls and expands as temperature increases. Propane volume rises as temperature rises and falls as temperature falls. In fact, the volume of any liquid in any container is directly related to its temperature. The liquid propane volume in any LP Gas container is directly related to its temperature. Propane Volume and Temperature Correction
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