Difference between nm3/h and sm3/h??????

[MadDog88]

Hello,
Can somebody please tell me the difference between nm3/h and sm3/h and how to convert between the two?
Thanks in advance for your help.

 

[spud1]

Normal conditions are generally 0ºC & 760mm Hg, standard conditions are 60ºF & 14.7psia - however different standards are used for "normal" in different industries so you need to confirm what standard your client or subject is using.

I tend to use the Uconeer conversion software, cos I'm lazy, this free software converts from mass to volumetric flowrate for standard and non-standard gasses along with many other conversions.

The web address is

http://www.katmarsoftware.com.

 

[cpwrocky]

Fisher regulators has a nice little conversion calculator.

1 cfh = 0.02832 Sm3/h = 0.0268 Nm3/h, according to this calculator.

 

[tickle]

Doo a search!

This question has been raised several times on ENGTIPS

 

[jcaiken]

There have been a number of attempts to codify the definitions of 'standard' conditions which simply adds to the confusion. I would recommend that the use of such standard volume flows should always be accompanied by a reference to the applicable 'standard' conditions.

Take care with the use of 15°C (59°F) and 60°F (15.55556°C), both of which are used for 'Standard' conditions in metric or "British" units respectively and have tended to be used interchangably.

Also, the conversion can be affected by the water content.

 

[25362]

Best would be to right down the selected T,P conditions to avoid confusion.

 

[pennpoint]

25362
Maybe you might want to write down the slected.....

Just a thought

pennpoint

 

[25362]

pennpoint, thanks.

As for many participants in these forums English is not my mother-tongue, Spanish is, and what we write is not precisely that which we think. One moment of distraction and see what happens ... I noticed the error (right instead of write) a millisecond after sending the message. Anyway, I hoped I'd conveyed my idea regarding normal and standard T,P. Thanks again.