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2. Nominal Pipe Size - Wikipedia

   en.wikipedia.org/wiki/Nominal_Pipe_Size

   Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

3. Centimetre or millimetre of water - Wikipedia

   en.wikipedia.org/wiki/Centimetre_or_millimetre...

   A centimetre of water [1] is a unit of pressure. It may be defined as the pressure exerted by a column of water of 1 cm in height at 4 °C (temperature of maximum density) at the standard acceleration of gravity, so that 1 cmH 2 O (4°C) = 999.9720 kg/m 3 × 9.80665 m/s 2 × 1 cm = 98.063754138 Pa ≈ 98.0638 Pa, but conventionally a nominal maximum water density of 1000 kg/m 3 is used, giving ...

4. Orders of magnitude (pressure) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(pressure)

   High air pressure for human lung, measured for trumpet player making staccato high notes [48] < +16 kPa +2.3 psi Systolic blood pressure in a healthy adult while at rest (< 120 mmHg) (gauge pressure) [44] +19.3 kPa +2.8 psi High end of lung pressure, exertable without injury by a healthy person for brief times [citation needed] +34 kPa +5 psi

5. Inch of water - Wikipedia

   en.wikipedia.org/wiki/Inch_of_water

   This is in contrast to inches of mercury or pounds per square inch (psi, lbf/in 2) for larger pressures. One usage is in the measurement of air ("wind") that supplies a pipe organ and is referred simply as inches. It is also used in natural gas distribution for measuring utilization pressure (U.P., i.e. the residential point of use) which is ...

6. Conversion of units - Wikipedia

   en.wikipedia.org/wiki/Conversion_of_units

   Conversion of units is the conversion of the unit of measurement in which a quantity is expressed, typically through a multiplicative conversion factor that changes the unit without changing the quantity. This is also often loosely taken to include replacement of a quantity with a corresponding quantity that describes the same physical property.

7. Pressure measurement - Wikipedia

   en.wikipedia.org/wiki/Pressure_measurement

   The back side shows the circuitry, and rectangular contact pads at top and bottom. Size: 4×4 mm. A pressure sensor is a device for pressure measurement of gases or liquids. Pressure sensors can alternatively be called pressure transducers, pressure transmitters, pressure senders, pressure indicators, piezometers and manometers, among other names.

8. Atmospheric pressure - Wikipedia

   en.wikipedia.org/wiki/Atmospheric_pressure

   Atmospheric pressure, also known as air pressure or barometric pressure (after the barometer), is the pressure within the atmosphere of Earth. The standard atmosphere (symbol: atm) is a unit of pressure defined as 101,325 Pa (1,013.25 hPa ), which is equivalent to 1,013.25 millibars , [ 1 ] 760 mm Hg , 29.9212 inches Hg , or 14.696 psi . [ 2 ]

9. Brannock Device - Wikipedia

   en.wikipedia.org/wiki/Brannock_Device

   3 + 3 ⁄ 4 inches (95 mm) 3 + 15 ⁄ 16 inches (100 mm) 4 + 1 ⁄ 8 inches (105 mm) 4 + 5 ⁄ 16 inches (110 mm) 4 + 1 ⁄ 2 inches (114 mm) 10 + 1 ⁄ 6 inches (258 mm) 7 + 23 ⁄ 100 inches (184 mm) 2 + 11 ⁄ 16 inches (68 mm) 2 + 7 ⁄ 8 inches (73 mm) 3 + 1 ⁄ 16 inches (78 mm) 3 + 1 ⁄ 4 inches (83 mm) 3 + 7 ⁄ 16 inches (87 mm) 3 + 5 ...