Forum Discussion
Hikerdogs
Sep 13, 2017Explorer
Chum lee wrote:
It's my understanding that, like gasoline, LPG mixtures change slightly based on the local temperatures and elevations where it is initially sold. In colder temperatures, the suppliers use more propane in the mix since it boils at a lower temperature. Higher temperatures can use a larger percentage of butane without issue. It short, unless you buy your LPG mid summer in Death Valley and then transport it to Vail, Colorado for winter use, you need not worry.
Chum lee
There may be a slight difference in mixture from one area to the next. However to be sold as HD5 or "consumer grade" Propane the mixture must contain at least 90 percent propane, a maximum of 5 percent Propylene, and a maximum of 2.5 percent Butanes and heavier gasses.
The term LPG is confusing in that it can be used to describe either Liquid Petroleum Gas, or Liquid Propane Gas. If a dealer advertises a gas as Propane it must contain at least 90 percent propane. If they advertise the product as LPG it can contain as little as 51 percent propane.
In some states dealers can be fined for selling liquid Petroleum Gas as Propane. About 10 years ago 2 dealers in Wisconsin received large fines for doing so. The problem was identified when several customers complained to the Wisconsin Department of Commerce about furnaces and water heaters not working during the winter months after their Propane tanks filled.
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