Self serve LPG? Update; link added

Kayteg1 wrote:

dougrainer wrote:


This comment is ridiculous. LP is under extreme pressure and is a Freezing Liquid when filling. A ten year old can put Gasoline in a car. An untrained ANY AGE could not correctly/Safely fill LP in a DOT tank or Motorhome ASME tank. There should NEVER be "Spilled" LP at any time. Slight vapor yes. Doug

Sounds like you haven't been much to propane fill station.
Not only filing process require constant spill of propane, make it mostly vapor but at the end in liquid, but when disconnecting hoses the operator has to spill several oz of liquid propane.
When filling my motorhome big tank, operators often had to use extensions, what added volume to spill.
I guess that is why most of stations offer price going down with volume.
The spill amount on 2 gallons is going to make much higher % than on 50 gallons.

Ye older stations do vent the filling hose and ya get charged for it, in Yellow stone, the first 20 something female could not fill my 50+ gallon tank and use ~.2 gallons to fill the lines which she vented before getting help, the next 20 something male started over without ZEROing the gauge and filled the line again with ~.2 gallon. At the end of the process, the fill valve is closed and the vent is opened (well away). My local filler used a low loss valve, very little vapor loss upon disconnect.

LP is generally not under extreme pressure, in my back yard it may reach ~200psig on a 110F afternoon, adding pump pressure would still not make it extreme, today @ 45F it is well under 100 psig. It is not a freezing liquid either, it is generally ambient temperature. It does absorb energy when vaporized just like sweat.

All states regulate propane, 49 have adopted various version of NFPA 58, AR has their own set of regulations. DOT does regulate its movement (in commerce).

We'll just have to wait and see this 'self serve' gadgetry!