Glossary entry (derived from question below)
English term or phrase:
atmospheric pressure
English answer:
atm or ATM
Added to glossary by
Milena Sahakian
Aug 8, 2004 08:36
19 yrs ago
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English term
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atmospheric pressure
English
Tech/Engineering
Mechanics / Mech Engineering
Minimal steady idling speed - 60 rpm at 0,7 atmospheric pressure and maximal 3400 rpm at 5 ATO.
Please I need the abbreviation for atmospheric pressure. First is left as it is, second is abbreviated. Is it the same or there is a difference?
Thank you all.
Please I need the abbreviation for atmospheric pressure. First is left as it is, second is abbreviated. Is it the same or there is a difference?
Thank you all.
Responses
Responses
5 hrs
Mark Xiang
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23
Selected
atm or ATM
atmospheric pressure
Britannica Concise
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or barometric pressure
Force per unit area exerted by the air above the surface of the Earth.
Standard sea-level pressure, by definition, equals 1 atmosphere (atm), or 29.92 in. (760 mm) of mercury, 14.70 lbs per square in., or 101.35 kilopascals, but pressure varies with elevation and temperature. It is usually measured with a mercury barometer (hence the term barometric pressure), which indicates the height of a column of mercury that exactly balances the weight of the column of atmosphere above it. It may also be measured using an aneroid barometer, in which the action of atmospheric pressure in bending a metallic surface is made to move a pointer.
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Note added at 22 hrs 49 mins (2004-08-09 07:26:30 GMT)
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1atm is about 1bar. But they are not the same.
Britannica Concise
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or barometric pressure
Force per unit area exerted by the air above the surface of the Earth.
Standard sea-level pressure, by definition, equals 1 atmosphere (atm), or 29.92 in. (760 mm) of mercury, 14.70 lbs per square in., or 101.35 kilopascals, but pressure varies with elevation and temperature. It is usually measured with a mercury barometer (hence the term barometric pressure), which indicates the height of a column of mercury that exactly balances the weight of the column of atmosphere above it. It may also be measured using an aneroid barometer, in which the action of atmospheric pressure in bending a metallic surface is made to move a pointer.
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Note added at 22 hrs 49 mins (2004-08-09 07:26:30 GMT)
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1atm is about 1bar. But they are not the same.
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Comment: "Thank you all. You helped me a lot with your answers."
+3
3 mins
bar
is the term for atmospheric pressure in standard use nowadays, and is not abbreviated. The factor given should read "0.7" in English.
Peer comment(s):
| agree |
Graciela Carlyle
: yep
34 mins
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| agree |
Vicky Papaprodromou
1 hr
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| agree |
Rajan Chopra
1 day 1 hr
|
+2
37 mins
Marijke Singer
Spain
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bar (metric) or psi (imperial)
See website:
http://www.engineeringtoolbox.com/21_587.html
Standard Atmospheric Pressure
The Standard Atmospheric Pressure (atm) is used as reference for gas densities and volumes. The Standard Atmospheric Pressure is defined at sea-level at 273oK (0oC) and is 1.01325 bar or 101325 Pa (absolute). The temperature of 293oK (20oC) is also used.
In imperial units the Standard Atmospheric Pressure is 14.696 psi.
101.3 kPa = 1 atm = 14.696 psi = 760 mmHg = 760 torr
Not a clue what ATO could be. Please do let us know.
http://www.engineeringtoolbox.com/21_587.html
Standard Atmospheric Pressure
The Standard Atmospheric Pressure (atm) is used as reference for gas densities and volumes. The Standard Atmospheric Pressure is defined at sea-level at 273oK (0oC) and is 1.01325 bar or 101325 Pa (absolute). The temperature of 293oK (20oC) is also used.
In imperial units the Standard Atmospheric Pressure is 14.696 psi.
101.3 kPa = 1 atm = 14.696 psi = 760 mmHg = 760 torr
Not a clue what ATO could be. Please do let us know.
Peer comment(s):
| agree |
Vicky Papaprodromou
56 mins
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Thanks, Vicky!
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| agree |
David Sirett
: Just a nitpick aimed at engineeringtoolbox.com: absolute temperature units are kelvins (K), not degrees Kelvin (°K).
2 hrs
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Thanks, David! Missed the degrees Kelvin!
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3 hrs
Jörgen Slet
Estonia
Estonia
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atmospheres
Technical texts still use "atmospheres" or "atm" a lot, I am not sure conversion to bars is necessary. I have not seen "standard atmospheric pressure" spelled out elsewhere than in textbooks.
http://www.acronymfinder.com/af-query.asp?acronym=ATO&String...
gives "Atmosphere Over Pressure" as the only relevant meaning of "ATO". I guess 5 ATO wold thus be 6 atm
http://www.acronymfinder.com/af-query.asp?acronym=ATO&String...
gives "Atmosphere Over Pressure" as the only relevant meaning of "ATO". I guess 5 ATO wold thus be 6 atm
3 hrs
Saleh Chowdhury, Ph.D.
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ATO = Atmospheric Transport Output
ATO = Atmospheric Transport Output
Ref: http://mepas.pnl.gov/earth/req/airreq.html
Ref: http://mepas.pnl.gov/earth/req/airreq.html
4 hrs
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There is no abreviation.
You either say 'X' atmosphere(s) or you express pressure in absolute units (Bar). Some people do use 'atm', but this is not accepted universally.
Discussion
Reading Juergen comments I think the translator (coz this is translated from Russian)wanted maybe to use abbreviation and not being sure which used this.