80% for gaslow or gasit

[IRHP]

These refillable cylinders are stated to be 11kg but only to be filled to 80% does that mean 80% of 11kg (8.8KG) or is 11kg already 80% of the max?

 

[VXman]

That's an interesting question I never thought about!

 

[Richard n Ann]

It holds 11kg of LPG when 80% full

 

[Minxy]

I never understand why they state it as 'weight' when it's actual volume that matters, ie litres.

 

[Two on Tour]

I never understand why they state it as 'weight' when it's actual volume that matters, ie litres.

Volume changes with temperature whereas weight remains the same which is why a petrol or diesel pumps on a forecourt states volume at 15 degrees C.
There is a 80% cutoff to allow for the volume to grow with temperature rise.

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[Spriddler]

I never understand why they state it as 'weight' when it's actual volume that matters, ie litres.

And the tin collars on Calor cylinders show the tare weight in lbs.

 

[Minxy]

Volume changes with temperature whereas weight remains the same which is why a petrol or diesel pumps on a forecourt states volume at 15 degrees C.
There is a 80% cutoff to allow for the volume to grow with temperature rise.

I understand that but the small difference temperature makes will be negligible, it makes more sense to state actual usable capacity in litres as that how we buy it.

 

[Richard n Ann]

I understand that but the small difference temperature makes will be negligible, it makes more sense to state actual usable capacity in litres as that how we buy it.

Just double it to convert to litres. Roughly

 

[gpat]

When they refill exchange cylinders they so it by weight.

As Two on Tour says only the weight is constant and therefore (even though specific gravity only varies a bit) the weight is absolute

 

[Minxy]

When they refill exchange cylinders they so it by weight.

As Two on Tour says only the weight is constant and therefore (even though specific gravity only varies a bit) the weight is absolute

So why not sell it by the kg then at fuel stations ...

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[Two on Tour]

So why not sell it by the kg then at fuel stations ...

Because for the most past liquids have been measured and dispensed in gallons and litres and the like, and the average person can get their head around liquid measures being in gallons and litres more than they can by weight.
Most people including me, would not have a clue how many miles 50kg of diesel would get me, where as 20 litres I would have a very good idea.

 

[Gaston aires]

Pumps sell by litres. LPG is not like water where 1kg = 1 ltr
It takes nearly 2 litres to weigh 1 kg.
Phil

 

[Spriddler]

I guess the advantage of describing the content of a cylinder by weight is that you can estimate the gas remaining in a part-used cylinder by weighing it.

 

[Gromett]

Because for the most past liquids have been measured and dispensed in gallons and litres and the like, and the average person can get their head around liquid measures being in gallons and litres more than they can by weight.
Most people including me, would not have a clue how many miles 50kg of diesel would get me, where as 20 litres I would have a very good idea.

You are totally correct and I agree with you. However...

Better get used to weight then if the Hydrogen nuts get their way. Hydrogen from the pump is sold by the KG as far as I understand it.