Gases conditions definitions
Gases conditions definitions
(OP)
Please I need to confirm which are by definition Pressure and Temperature for Gases at Normal condition and Standard condition.
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
Gases conditions definitions
|
RE: Gases conditions definitions
Standard (SI ): 1 atm 15 deg C
Standard (imperial: 14.7 psia (=1 atm), 60 deg F=15.6 deg C
Best Regards
Morten
RE: Gases conditions definitions
RE: Gases conditions definitions
BUT You _cant_ use 100 kPa for your Normal/standard definition! Its 101.325 kPa if you insist!
AND its NOT 15.6 deg C for standard BUT 15.0 deg C (yes i know is a wrong rounding but thats how its defined)
Best Regards
Morten
RE: Gases conditions definitions
Yours is a good question, and has elicited some good replies. It points out the myth of SI being a universal system. Each country has its own set of SI units, especially when "Standard Conditions" are defined for such purposes as metering of gas flows or quantification of gas volumes for commerce or custody transfer. Use the SI and/or other units that are defined in the commerce and trade laws of the country that your project pertains to. Most countries define these "standards", and may even give the numerical values for the units to be used. Good luck to you.
RE: Gases conditions definitions
Don't just accept 'standard' conditions, ensure that those conditions are specified. It doesn't really matter what is used, as long as all parties use the same basis (although some industries will definitely have a commonly used basis).