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Here's a weird question. When I buy C25, is it 25% CO2 by mass, volume, or what?
I was socially distant before it was cool.
Jack Ryan
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Chips O'Toole wrote: Thu Oct 12, 2023 5:54 pm Here's a weird question. When I buy C25, is it 25% CO2 by mass, volume, or what?
The relevant standards will tell you but, like you, I don't have them.

However, BOC states: The designation system shall be based on volumetric percentages.

https://www.boc-gas.com.au/en/images/BO ... 411245.pdf

Jack
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