Propane fill question
OK I am officially confused. I took one of my 40lb. propane cylinders out of my new RV to have it filled. A note on the door of the propane compartment said do not fill over 80%, could cause fire,e...
Forum Discussion
smkettner wrote:
First of all anyone that talks about overfilling a propane bottle to 100% of gross volume needs to explain how they are getting past the OPD valve that limits the fill to 100% of rated volume.
The OPD is not functioning correctly. If the OPD does not shut off at below 80% (40# in OPs case), no one will know it is not working. It is not the primary device used to fill.
If the filler stops filling cuz the scale tips, the OPD did not engage.
If the filler stops filling cuz 'liquid' is coming out the fixed max liquid gauge, the OPD did not engage.
Since 80% of container volume is based on 40F, any temp above 40F, the OPD should stop filling since the volume of liquid is larger. The dip tube length (DT) is based on 40F/80%, specific gravity of .504-.510 .
4-4.3.3 Where used, the volumetric method shall be in accordance
with the following:
(a) If a fixed maximum liquid level gauge or a variable liquid level
gauge without liquid volume temperature correction
is used, the liquid level indicated by these gauges
shall be computed based on the maximum permitted
filling limit when the liquid is at 40°F (4°C) for aboveground
containers or at 50°F (10°C) for underground
containers.
