N m3 of a gas

[plantprowler]

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?

 

[katmar]

Unfortunately not. See

https://en.wikipedia.org/wiki/Standard_conditions_for_temperature_and_pressure

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

http://katmarsoftware.com

"An undefined problem has an infinite number of solutions"

 

[plantprowler]

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.

 

[katmar]

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

http://katmarsoftware.com

"An undefined problem has an infinite number of solutions"

 

[25362]

Visit thread798-106556.

 

[LittleInch]

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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