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Absolute pressure psia

P = absolute pressure, psia, at flowing gas conditions, or = may be operating pressure, psia Pl = line pressure, psi abs... [Pg.612]

Absolute pressure (psia) values must be used when computing the pressure changes in a volume and when pressure is given as one of the conditions defining the amount of gas contained within a sample. [Pg.636]

Vacuum pressure Gauge pressure in psi (gpsi) is the amount by which pressure exceeds the atmospheric pressure of 14 psi (negative in the case of vacuum). The absolute pressure (psia) is measured with respect to zero absolute vacuum [29.92 in. (101 kPa) Hg], In a vacuum system it is equal to the negative gage pressure subtracted from the atmospheric pressure. (Gauge pressure + atmospheric pressure = absolute pressure) (1 in. Hg = 0.4912 psi of atmosphere on a product) (1 psi = 2.036 in. Hg). [Pg.644]

Saturated steam pressure psig Absolute pressure psia Bar absolute Approximate temperature °F Approximate temperature °C... [Pg.8]

Absolute pressure (psia) = boiler gauge pressure (psig) + atmospheric pressure (psiatm)... [Pg.81]

Temp °F Temp °C Absolute pressure psia Bar bora Steam pressure psig Enthalpy (Btu/lb.) ... [Pg.107]

The first example was formulated by Stoecker to illustrate the steepest descent (gradient) direct search method. It is proposed to attach a vapor recondensation refrigeration system to lower the temperature, and consequently vapor pressure, of liquid ammonia stored in a steel pressure vessel, for this would permit thinner vessel walls. The tank cost saving must be traded off against the refrigeration and thermal insulation cost to find the temperature and insulation thickness minimizing the total annual cost. Stoecker showed the total cost to be the sum of insulation cost i = 400jc° 9 (x is the insulation thickness, in.), the vessel cost v = 1000 + 22(p — 14.7)1-2 (p is the absolute pressure, psia), and the recondensation cost r = 144(80 — t)/x (t is the temperature, °F). The pressure is related to the temperature by... [Pg.180]

Absolute Pressure (psia). The sum of atmospheric and gauge pressures. Absolute pressure in a perfect vacuum is 0, and at the atmosphere at sea level is 14.7 psi (0 psig). [Pg.438]

Measured with respect to zero (absolute) vacuum in a vacuum system, absolute pressure (psia) is equal to the negative gauge pressure (psig) subtracted from the atmospheric pressure. [Pg.221]

If the absolute pressure rises to about 4 psia, the rotation stops, an alarm sounds, and a nitrogen purge starts automatically... [Pg.45]

The vapor pressure of a liquid is the absolute pressure at which the liquid vaporizes or converts into a gas at a specific temperature. Normally, the units are expressed in pounds per square inch absolute (psia). The vapor pressure of a liquid increases with its temperature. For this reason the temperature should be specified for a declared vapor pressure. [Pg.24]

Inside the pump, the pressure deereases in the eye of the impeller beeause the fluid veloeity inereases. For this reason the liquid ean boil at a lower pressure. For example, if the absolute pressure at the impeller eye should fall to 1.0 psia, then water eould boil or vaporize at about 100°F (see the Tables in Chapter 2 Properties of Water I and II). [Pg.25]

G = Gas specific gravity = mol. wt./29 Pi = Valve inlet pressure, psia AP = Pressure drop across valve, psi Q = Gas flow rate, SCFH Qs = Steam or vapor flow rate, Ib/hr T = Absolute temperature of gas at inlet, °R T5I1 = Degrees of superheat, °F... [Pg.15]

P[ = Absolute pressure, toir AP( = Pressure drop, ton P = Pressure, psi absolute (psia)... [Pg.155]

P , = Atmospheric pressure or absolute pressure in vessel, psia... [Pg.221]

Pj, = Brake horsepower at shutoff or no flow P[d = Differential pressure between absolute pressures at outlet and inlet to pump, psi P,p = Vapor pressure of liquid at pumping temperature, psia... [Pg.221]

Pj = initial absolute pressure V1 = initial volume of air or gas P2 = final pressure (psia)... [Pg.633]

In calculations that involve gas pressure and volume, absolute pressure or pounds per square inch absolute (psia) must be used. [Pg.633]

A different reference level, absolute pressure, is used to obtain the total pressure value. Absolute pressure is the total pressure, i.e., gage and atmospheric, and is expressed as psia or pounds per square inch absolute. To obtain absolute pressure, simply add the value of atmospheric pressure (14.7 psi at sea level) to the gage pressure reading. [Pg.636]

Torr Absolute Pressure Inches Hg (Abs.) Psia Vacuum ... [Pg.581]

From Figure 9-6, Kb = 0.86 for an overpressure of 10%. The effective discharge coefficient is assumed to be 0.975. The gas compressibility factor z is approximately 1 at these pressures. The pressure P is the maximum absolute pressure. Thus P = 69.7 psia. The constant x >s computed from Equation 9-10 ... [Pg.393]


See other pages where Absolute pressure psia is mentioned: [Pg.106]    [Pg.391]    [Pg.436]    [Pg.861]    [Pg.246]    [Pg.22]    [Pg.37]    [Pg.106]    [Pg.391]    [Pg.436]    [Pg.861]    [Pg.246]    [Pg.22]    [Pg.37]    [Pg.15]    [Pg.15]    [Pg.20]    [Pg.20]    [Pg.165]    [Pg.113]    [Pg.125]    [Pg.147]    [Pg.365]    [Pg.576]    [Pg.597]    [Pg.611]    [Pg.125]    [Pg.37]    [Pg.194]    [Pg.147]   


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Absolute pressure

Psia

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