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N m3 of a gas

N m3 of a gas

N m3 of a gas

Is there a standard accepted definition for "N m3" when speaking about gases? I see conflicting information with some sources using 0 C as the reference temperature whereas others use 20 C.

Is there any widely accepted definition of the term?

RE: N m3 of a gas

Unfortunately not. See https://en.wikipedia.org/wiki/Standard_conditions_...

This is why it is so important to state your standard conditions whenever you issue a calculation or specification. If someone issues a document to you make sure that you know what standard they are using.

Katmar Software - AioFlo Pipe Hydraulics

"An undefined problem has an infinite number of solutions"

RE: N m3 of a gas

Thanks @katmar.

Even if not universally accepted definitions, any idea if the industrial gas majors have agreed upon a definition? I was trying to look up the Praxair / Linde websites but did not find any guidance. In case it matters, this is for Hydrogen.

RE: N m3 of a gas

No. It varies with the geographical area and with the type of industry, and with the whims of the people involved. All documents should state the standard conditions. If someone issuing a document is unable or unwilling to clarify their standard conditions then be suspicious of everything else in the document.

Katmar Software - AioFlo Pipe Hydraulics

"An undefined problem has an infinite number of solutions"

RE: N m3 of a gas

It also depends on the accuracy you require. In reality the difference between the different base data is not huge, unless you're dealing with trillions of cubic ft / m when it makes a huge monetary difference.

But one cylinder it doesn't.

Somewhere in the middle is usually a good point and the 15C / 60F and 1.01325 bara / 14.696 psia is usually my start point if no one has defined it and the odd decimal point isn't that important.

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