Units of Pressure 1

[ChemEHiker]

I have encountered a unit of pressure labeled 'ata'. I was inclined to think this was atmospheres absolute but the numbers do not seem to work out. Any input would be appreciated.

 

[Unotec]

Atmospheres absolute, if I recall correctly

<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying ” Damn that was fun!” - Unknown>>

 

[Unotec]

If you google ata + pressure, this links pops up

http://ffden-2.phys.uaf.edu/103_fall2003.web.dir/Wally_Drumhiller/page2.html

<<A good friend will bail you out of jail, but a true friend
will be sitting beside you saying ” Damn that was fun!” - Unknown>>

 

[hahor]

1 ata = 1 kp/cm2 absolute pressure

1 bar = 1 N/m2 = 1.0197 kp/cm2

1 kp = 1kg-force

mayby this helps

Kind Regards,
hahor

 

[25362]

To hahor,

From your own correlations, since one standard atmosphere [&asymp;] 1.01325 bar, it follows that 1 standard atmosphere [&ne;] 1 kg_f/cm²

but is [&asymp;] 1.033 kg_f/cm²

kg_f = 1 kg-force.

 

[JLSeagull]

For purity sake, avoid grams as a unit of force. That's just wrong.

 

[hahor]

to 25362

please do do confuse standard atmospheric pressussure

and [at] "Technische Atmosphäre"

1 at = 1 kp/cm2 per definition

There is another pressure unit [atm] "Standardatmosphäre" which is equal to 101325 Pa

for further identification [at] can be extended as [ata] Technische Absolut Atmosphäre or [atü] Technische Überdruck Atmosphäre.

I know this might be confusing, but this is all due to history.

Kind Regards,
hahor

 

[25362]

To habor,

The technical atmosphere = 1 kg_f/cm² is not in frequent use. If not otherwise indicated, at present, 1 atmosphere is considered a standard atmosphere per the SI (International System of Units), equal to 1.013250*E+05 Pa.