Difference between revisions of "Pressure"

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Pressure is a measurement of the force a gas exerts on a given area. It is most commonly measured in pounds per square inch (psi), bar, kg/cm<sup>2</sup> or atmospheres. The latter three units are quite similiar and can often be used together without conversion.
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Pressure is a measurement of the force a gas exerts on a given area. It is most commonly measured in pounds per square inch (psi), bar, kgf/cm<sup>2</sup> or atmospheres. The latter three units are quite similar and can often be used together without conversion.
  
  
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{|
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<table width="581" height="232" border="2" bordercolor="#000000" bgcolor="#000000">
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|+Conversion factors (rounded to 3 decimal places):
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  <tr bgcolor="#FFFFFF">
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|1 bar|| = 14.504 psi || = 1.02 kg/cm<sup>2</sup> || = 0.987 atm
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    <th width="40" height="38" scope="col"><div align="center"></div></th>
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    <th width="61" scope="col"> <div align="center">Pascal (Pa)</div></th>
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|1 psi || = 0.069 bar || = 0.07 kg/cm<sup>2</sup> || = 0.068 atm
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    <th width="87" scope="col"><div align="center">Bar (bar)</div></th>
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|-
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    <th width="87" scope="col"><div align="center">Technical atmosphere (at)</div></th>
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|1 kg/cm<sup>2</sup> || = 0.98 bar || = 14.223 psi || = 0.968 atm
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    <th width="94" scope="col"><div align="center">Atmosphere (atm)</div></th>
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|-
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    <th width="82" scope="col"><div align="center">Torr (mmHg)</div></th>
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|1 atm || = 1.013 bar || = 14.696 psi || = 1.033 kg/cm<sup>2</sup>
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    <th width="82" scope="col"><div align="center">Pound per square inch (psi)</div></th>
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|}
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th scope="row"><div align="center">1 Pa</div></th>
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    <td><div align="center">1 N/m&sup2;</div></td>
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    <td><div align="center">10<sup>&minus;5</sup></div></td>
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    <td><div align="center">10.197&times;10<sup>&minus;6</sup></div></td>
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    <td><div align="center">9.8692&times;10<sup>&minus;6</sup></div></td>
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    <td><div align="center">7.5006&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">145.04&times;10<sup>&minus;6</sup></div></td>
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th scope="row"><div align="center">1 bar</div></th>
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    <td><div align="center">100,000</div></td>
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    <td><div align="center">10<sup>6</sup> dyn/cm&sup2;</div></td>
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    <td><div align="center">1.0197</div></td>
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    <td><div align="center">0.98692</div></td>
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    <td><div align="center">750.06</div></td>
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    <td><div align="center">14.504</div></td>
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th scope="row"><div align="center">1 at</div></th>
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    <td><div align="center">98,066.5</div></td>
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    <td><div align="center">0.980665</div></td>
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    <td><div align="center">1 kgf/cm&sup2;</div></td>
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    <td><div align="center">0.96784</div></td>
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    <td><div align="center">735.56</div></td>
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    <td><div align="center">14.223</div></td>
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th scope="row"><div align="center">1 atm</div></th>
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    <td><div align="center">101,325</div></td>
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    <td><div align="center">1.01325</div></td>
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    <td><div align="center">1.0332</div></td>
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    <td><div align="center">101,325 Pa</div></td>
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    <td><div align="center">760</div></td>
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    <td><div align="center">14.696</div></td>
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th scope="row"><div align="center">1 torr</div></th>
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    <td><div align="center">133.322</div></td>
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    <td><div align="center">1.3332&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">1.3595&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">1.3158&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">1 mmHg</div></td>
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    <td><div align="center">19.337&times;10<sup>&minus;3</sup></div></td>
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  </tr>
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  <tr bgcolor="#FFFFFF">
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    <th height="23" scope="row"><div align="center">1 psi</div></th>
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    <td><div align="center">6,894.76</div></td>
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    <td><div align="center">68.948&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">70.307&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">68.046&times;10<sup>&minus;3</sup></div></td>
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    <td><div align="center">51.715</div></td>
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    <td><div align="center">1 lbf/in&sup2;</div></td>
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  </tr>
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</table>
  
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[http://www.processassociates.com/cgi-bin/convert.exe Online converter]
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[http://en.wikipedia.org/wiki/Pressure Wikipedia: Pressure]
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[[category:Concepts]]

Latest revision as of 17:09, 26 November 2007

Pressure is a measurement of the force a gas exerts on a given area. It is most commonly measured in pounds per square inch (psi), bar, kgf/cm2 or atmospheres. The latter three units are quite similar and can often be used together without conversion.


Pascal (Pa)
Bar (bar)
Technical atmosphere (at)
Atmosphere (atm)
Torr (mmHg)
Pound per square inch (psi)
1 Pa
1 N/m²
10−5
10.197×10−6
9.8692×10−6
7.5006×10−3
145.04×10−6
1 bar
100,000
106 dyn/cm²
1.0197
0.98692
750.06
14.504
1 at
98,066.5
0.980665
1 kgf/cm²
0.96784
735.56
14.223
1 atm
101,325
1.01325
1.0332
101,325 Pa
760
14.696
1 torr
133.322
1.3332×10−3
1.3595×10−3
1.3158×10−3
1 mmHg
19.337×10−3
1 psi
6,894.76
68.948×10−3
70.307×10−3
68.046×10−3
51.715
1 lbf/in²

Wikipedia: Pressure

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