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What`s a "psi"?
What`s a "psi"?
Published: 2014/07/21
Channel: apprenticemath
Pounds per square inch
Pounds per square inch
Published: 2014/08/30
Channel: Audiopedia
Converting Feet to PSI
Converting Feet to PSI
Published: 2015/12/14
Channel: FranklinWater
Pounds per Square Inch
Pounds per Square Inch
Published: 2016/04/12
Channel: whaughey
Pounds Per Square Inch - DLC Podcast Show, Season 5, Episode 14
Pounds Per Square Inch - DLC Podcast Show, Season 5, Episode 14
Published: 2015/08/05
Channel: pennyarcadeTV
Bowling Ball vs a 60,000 PSI Waterjet
Bowling Ball vs a 60,000 PSI Waterjet
Published: 2016/09/30
Channel: Waterjet Channel
Hydraulics: Ft to PSI
Hydraulics: Ft to PSI
Published: 2010/09/08
Channel: 16FLSI
Centimeters of water pressure and pounds per square inch. CPAP Therapy. FreeCPAPAdvice.com
Centimeters of water pressure and pounds per square inch. CPAP Therapy. FreeCPAPAdvice.com
Published: 2013/12/09
Channel: TheLankyLefty27
Pressure Washer Buying Guide
Pressure Washer Buying Guide
Published: 2014/05/06
Channel: Canadian Tire
Dry Ice vs 60,000 PSI Waterjet
Dry Ice vs 60,000 PSI Waterjet
Published: 2017/02/04
Channel: Waterjet Channel
understanding natural gas pressure, measured in water colum-instead of PSI.(loudepot)
understanding natural gas pressure, measured in water colum-instead of PSI.(loudepot)
Published: 2012/06/27
Channel: louis tsalikis
Pounds per Square Inch
Pounds per Square Inch
Published: 2016/01/31
Channel: Rick Rogers
How To Convert From Psi to Atm
How To Convert From Psi to Atm
Published: 2015/09/27
Channel: The Organic Chemistry Tutor
how to convert psi to bar - pressure converter
how to convert psi to bar - pressure converter
Published: 2015/02/07
Channel: Electrical videos
Physical Science 3.1g - Pressure Practice Problems 1 - 2
Physical Science 3.1g - Pressure Practice Problems 1 - 2
Published: 2014/01/02
Channel: Derek Owens
Problem 3 PSI.wmv
Problem 3 PSI.wmv
Published: 2010/04/05
Channel: WaterandWaste
Day of Domination!!!  Diamonds are created under 725,000 pounds per square inch of Pressure ᴴᴰ
Day of Domination!!! Diamonds are created under 725,000 pounds per square inch of Pressure ᴴᴰ
Published: 2016/01/05
Channel: Justin Halladay
Destructive Test of 200 PSI Hydraulic Gauge
Destructive Test of 200 PSI Hydraulic Gauge
Published: 2015/10/22
Channel: AvE
7000 PSI pressure washer cutting through a sheet of plywood. Dan Swede 800-666-1992
7000 PSI pressure washer cutting through a sheet of plywood. Dan Swede 800-666-1992
Published: 2013/03/21
Channel: Dan Swede
Brick test- pounds per square inch
Brick test- pounds per square inch
Published: 2013/11/18
Channel: Mario Mutis
Zookeeper Jimmy Bravely Feeds American Alligators with BITE FORCE of 2,000 Pounds Per Square Inch! A
Zookeeper Jimmy Bravely Feeds American Alligators with BITE FORCE of 2,000 Pounds Per Square Inch! A
Published: 2016/12/17
Channel: Karen Marts
PSI Punch Machine at Lasertron
PSI Punch Machine at Lasertron
Published: 2013/05/18
Channel: Kongman4547
15 psi (pound per square inch) of VHB Pressure
15 psi (pound per square inch) of VHB Pressure
Published: 2010/09/27
Channel: Jerome Gipson
PSIG Meaning
PSIG Meaning
Published: 2015/04/25
Channel: ADictionary
Pounds per Square Inch
Pounds per Square Inch
Published: 2016/09/29
Channel: brielleness
PSI Meaning
PSI Meaning
Published: 2015/04/21
Channel: SDictionary
Let
Let's Play A2XT! - 29 - Seventeen Pounds per Square Inch
Published: 2017/05/22
Channel: QubicTom
Air DartsTest 75 PSI =pounds per square inch
Air DartsTest 75 PSI =pounds per square inch
Published: 2010/05/10
Channel: BuildingARobotArmy
how to convert psi to kilo pascal - pressure converter
how to convert psi to kilo pascal - pressure converter
Published: 2015/02/07
Channel: Electrical videos
Pounds per square inch
Pounds per square inch
Published: 2016/08/07
Channel: WikiWikiup
PSIA vs  PSIG2
PSIA vs PSIG2
Published: 2016/05/03
Channel: Georges Corbeil
Four hundred and fifty two pounds per square inch
Four hundred and fifty two pounds per square inch
Published: 2015/06/27
Channel: Ian v Curtis Fine Art Sculptor.
how to convert psi to kilogram per centimeter square kg/cm2 - pressure converter
how to convert psi to kilogram per centimeter square kg/cm2 - pressure converter
Published: 2015/02/08
Channel: Electrical videos
how to convert bar to psi - pressure converter
how to convert bar to psi - pressure converter
Published: 2015/01/28
Channel: Electrical videos
Diesel Newb Scared By 60+PSI AWD Launch!
Diesel Newb Scared By 60+PSI AWD Launch!
Published: 2017/05/11
Channel: Cleetus McFarland
how to convert kpa to psi - pressure converter
how to convert kpa to psi - pressure converter
Published: 2015/01/31
Channel: Electrical videos
Pressing Cider - Critz Farm - 50,000 pounds per square inch
Pressing Cider - Critz Farm - 50,000 pounds per square inch
Published: 2010/10/31
Channel: Rob Thrasher
What Does PSI Stand For When Dealing With Pressure?
What Does PSI Stand For When Dealing With Pressure?
Published: 2017/07/18
Channel: clever sparky
Aiforce Texan  761 FOOT POUNDS  with  4500 psi Upgrade ,    554 grain bullet chronograph numbers
Aiforce Texan 761 FOOT POUNDS with 4500 psi Upgrade , 554 grain bullet chronograph numbers
Published: 2017/03/02
Channel: Jeremy King
Pressing Cider - 50,000 pounds per square inch
Pressing Cider - 50,000 pounds per square inch
Published: 2010/10/31
Channel: Rob Thrasher
Convertir de psi a Pascal (psi a Pa)
Convertir de psi a Pascal (psi a Pa)
Published: 2016/04/30
Channel: iEnciclotareas
Calculate Pressure psi in Bottom of Tank
Calculate Pressure psi in Bottom of Tank
Published: 2015/09/08
Channel: Wastewater Dan
What Does PSI Stand For In Units Dealing With Pressure?
What Does PSI Stand For In Units Dealing With Pressure?
Published: 2017/07/18
Channel: clever sparky
Pounds Per Square Inch?
Pounds Per Square Inch?
Published: 2011/05/22
Channel: Mojophoria
What Is Swimming Pool GPM (Flow Rate) and PSI?
What Is Swimming Pool GPM (Flow Rate) and PSI?
Published: 2014/01/28
Channel: Clean Pool & Spa - Ultimate Swimming Pool Care Guide
Near 2000 PSI Punch Crushes Opponent
Near 2000 PSI Punch Crushes Opponent
Published: 2015/07/25
Channel: THOMAS GOLDA
What PSI Should I Put In My Tyres?
What PSI Should I Put In My Tyres?
Published: 2017/07/18
Channel: clever sparky
What Does Psi On A Tire Stand For?
What Does Psi On A Tire Stand For?
Published: 2017/07/18
Channel: clever sparky
Pool Filter PSI: High and Low Filter Pressure - Causes and Cures
Pool Filter PSI: High and Low Filter Pressure - Causes and Cures
Published: 2016/08/02
Channel: Swimming Pool Tips, Reviews & How To -MrDgvb1
Two Thousand Pounds Per Square Inch The Russel Middlebrook Series Book 5 Pdf Book
Two Thousand Pounds Per Square Inch The Russel Middlebrook Series Book 5 Pdf Book
Published: 2017/01/14
Channel: R Jordan
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Pound per square inch
Psidial.jpg
A pressure gauge reading in psi (red scale) and kPa (black scale)
Unit information
Unit system Imperial units, US customary units
Unit of Pressure, Stress
Symbol psi or lbf/in2
Unit conversions
1 psi in ... ... is equal to ...
   SI units    6.894757 kPa

The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2;[1] abbreviation: psi) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch:

Therefore, one pound per square inch is approximately 6894.757 Pa.

Now converting the psi to standard atmospheres:

Therefore, 1 atmosphere is approximately 14.7 pounds per square inch.

Pounds per square inch absolute (psia) is used to make it clear that the pressure is relative to a vacuum rather than the ambient atmospheric pressure. Since atmospheric pressure at sea level is around 14.7 psi, this will be added to any pressure reading made in air at sea level. The converse is pounds per square inch gauge or pounds per square inch gauge (psig), indicating that the pressure is relative to atmospheric pressure. For example, a bicycle tire pumped up to 65 psi above local atmospheric pressure (say, 14.7 psia locally), will have a pressure of 65 + 14.7 = 79.7 psia or 65 psig.[2][3] When gauge pressure is referenced to something other than ambient atmospheric pressure, then the units would be pounds per square inch differential (psid).

Multiples[edit]

The kilopound per square inch (ksi) is a scaled unit derived from psi, equivalent to a thousand psi (1000 lbf/in2).

ksi are not widely used for gas pressures. They are mostly used in materials science, where the tensile strength of a material is measured as a large number of psi.[4]

The conversion in SI Units is 1 ksi = 6.895 MPa, or 1 MPa = 0.145 ksi.

The megapound per square inch (Mpsi) is another multiple equal to a million psi. It is used in mechanics for the elastic modulus of materials, especially for metals.[5]

The conversion in SI Units is 1 Mpsi = 6.895 GPa, or 1 GPa = 0.145 Mpsi.

Magnitude[edit]

Conversions[edit]

Pressure units
Pascal Bar Technical atmosphere Standard atmosphere Torr Pounds per square inch
(Pa) (bar) (at) (atm) (Torr) (psi)
1 Pa ≡ 1 N/m2 10−5 1.0197×10−5 9.8692×10−6 7.5006×10−3 1.450377×10−4
1 bar 105 ≡ 100 kPa

≡ 106 dyn/cm2

1.0197 0.98692 750.06 14.50377
1 at 9.80665×104 0.980665 ≡ 1 kp/cm2 0.9678411 735.5592 14.22334
1 atm 1.01325×105 1.01325 1.0332 1 760 14.69595
1 Torr 133.3224 1.333224×10−3 1.359551×10−3 ≡ 1/760 ≈ 1.315789×10−3 ≡ 1 Torr

≈ 1 mmHg

1.933678×10−2
1 psi 6.8948×103 6.8948×10−2 7.03069×10−2 6.8046×10−2 51.71493 ≡ 1 lbf /in2

See also[edit]

References[edit]

  1. ^ IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units), IEEE Std 260.1™-2004 (Revision of IEEE Std 260.1-1993)
  2. ^ "Glossary of Industrial Air Cleaning Technology". United Air Specialists, Inc. Archived from the original on August 1, 2011. 
  3. ^ "Gage v. Sealed v. Absolute pressure" (PDF). Dynisco. 
  4. ^ "Tensile Strength of Steel and Other Metals". All Metals & Forge Group. Retrieved 2016-07-26. A metal’s yield strength and ultimate tensile strength values are expressed in tons per square inch, pounds per square inch or thousand pounds (KSI) per square inch. For example, a tensile strength of a steel that can withstand 40,000 pounds of force per square inch may be expressed as 40,000 PSI or 40 KSI (with K being the [multiplier] for thousands of pounds). The tensile strength of steel may also be shown in MPa, or megapascal. 
  5. ^ An example of the use of Mpsi in mechanics for the elastic moduli of several materials

External links[edit]

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