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Old 26th December 2017, 11:21 PM
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27litres 27litres is offline
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Is the volume measured at the tank?
Or off the truck?

The base measure of 1% will just be an inaccuracy of however they measure it (float or pressure measure).
It takes quite some pressure to liquify propane, which means quite a volume of gas, and a float measure (which is common in LPG tanks, so possibly in bulk propane tanks too?) will only start to measure once it can float on a liquid. That should explain the initial discrepancy in % full to volume.

You're dealing with a pressure vessel. Volume won't be accurate, as it varies with ambient temperature.
Off the truck is the most accurate measure, as it should be able to measure flow volume, much like an LPG pump does.

Does the tank sit on its side, or vertically?
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