Converting CFT to Litres....?

[Twinsetmad]

I'm being a bit lazy I know, but is a US 13cft cylinder the same size as a UK 1.5ltr...?

Thanks Andrew

[jptaylor9]

assuming WP is 3000 psi, it's equivalent to a 1.8L cylinder at 207 bar.

GMP has a cylinder equivalence tab, imperial to/from metric.

JT

[copperband]

Hi Andrew, Google has a great calculator, just type in "13 cubic feet to litres" and click search.

[jptaylor9]

Originally Posted by copperband

Hi Andrew, Google has a great calculator, just type in "13 cubic feet to litres" and click search.

Not quite..... Imperial system (i.e. 13 cu ft) is volume of gas at atmospheric pressure, or how much space would it take up if cylinder emptied. Metric system is internal volume of cylinder e.g. 10L. The google calculator doesn't account for this, just says 13 cf is 386 litres.

[NotDeadYet]

Yep, you need the cylinder's pressure rating for the conversion to be meaningful. Septic allys are usually 3000psi, steels are of ten in oddball ratings, sometimes quite low compared to UK cylinders.

Convert the cu ft to litres to give the free volume of air, divide by the pressure rating in bar to give the water volume of the cylinder.

Cheers,

Stuart

[Twinsetmad]

Thanks fella's

[Mal Bridgeman]

To convert cuft to litres, multiply by 28, then divide by the pressure of gas

e.g. an Ali 80 = 11.2 litres

80 *28 = 2240
2240/200 = 11.2

to convert PSI to Bar, divide by 15.

HTH
Mal

[hebails]

Originally Posted by Mal Bridgeman

To convert cuft to litres, multiply by 28, then divide by the pressure of gas

e.g. an Ali 80 = 11.2 litres

80 *28 = 2240
2240/200 = 11.2

to convert PSI to Bar, divide by 15.

HTH
Mal

Useful stuff Mal.
Thanks for that.
Paul