23 Apr 12 7:20
You have several concepts confused here. kg/hr is the units of mass flow rate. Mass flow rate is not compensated or adjusted for temperature and pressure. It is an absolute unit. Trouble is it is really difficult to measure directly.
Now, if you were talking about volume flow rate then it is appropriate to state it in either actual flowing conditions or based on a reference condition. The reference condition is usually called "standard temperature and pressure". The problem is that "standard" is whatever two people agree it is. There are dozens of "standards" written into contracts, regulations, and conventions. None of them is anything like universal. I've seen 1 bar (14.5 psia) and 0C (32F). I've seen 101.56 kPa (14.73 psia) and either 0C or 15C (59F), etc. There are many standards. I regularly see one set of numbers used for a gas sales contract and another used to report volumes to the government.
In your equations above, the first one is a mess. It should be:
(I added compressibility and deleted the square root), but the units would be something like m^3/hr or Nm^3/hr, or Sm^3/hr (where the "N" is "normal" and the "S" is "Standard".
Finally the 1.033 kgf/cm^2(g) is supposed to be local atmospheric pressure, which has the value you referenced in very (rare) specific cases.
If you are going to use the horrible term "kgf" then you have to be prepared to convert it to "kg" using a metric version "gc" which I'm not going to get into here.