psia=psig+atmospheric pressure where, atmospheric pressure = 14.7psi therefore psig=psia-atmospheric pressure psig=100-14.7 psig=85.3psig
70 psig
psig
55 psig +15=70
PSIA is Atmospheric pressure determined by what sea level you're at it will differ its weird how it works 30 PSIA is like 15 PSI, that's not exact so don't go by cutting the numbers in half I'll get back to you on the specifics PSI is read just like a tire
PSIG refers to pound/force per square inch gauge, while PSI measures the pressure relative to a vacuum. If you want to convert a figure from PSIG to PSI, you would need to add 14.7psi to your PSIG figure, which will give you your PSIA result.
psia=psig+atmospheric pressure where, atmospheric pressure = 14.7psi therefore psig=psia-atmospheric pressure psig=100-14.7 psig=85.3psig
add atmosperic pressure to gage pressure to convert to psia one atm standard = 14.7 psi
70 psig
(psi x 6.89476 = kPa). So, 70 psi x 6.89476 = 482.633 kPa
psig
55 psig +15=70
0 psia is used as a reference point for pressure measurements because it represents the absence of pressure, equivalent to a perfect vacuum. By using 0 psia as a reference, pressure measurements are taken relative to this baseline to accurately determine pressure differentials in various systems and processes.
psia IS the abbreviation. It stands for Pounds per Square Inch Absolute. When determining a pressure, you are typically measuring it with something that is subjected to atmospheric pressure (1atm~14psia) just like you and I. So say you inflate your tires to 35 psi and check it with a tire gauge. That reading is the GAUGE pressure, or psig. Typically, gauge pressures will not use the G at the end because people tend to be good enough at noticing that there's a difference between "psi" and "psia" and start to ask questions. The ABSOLUTE pressure is the gauge pressure plus the atmospheric pressure. Expressed in equation form, this looks like: psia = psig + atm -or- psig = psia - atm In the case of a vacuum, where there is less than atmospheric pressure, an absolute gauge will read positive values while a typical gauge will read negative values. The equation still holds true. Example: Absolute pressure = 4 psia 1 atm ~ 14 psia What is the gauge pressure? -10 psig 4 psia - 14 psia = -10 psig
The difference between Absolute Presure and Gauge Pressure is 14.7psi. So zero gauge pressure (0psig) = 14.7 psia. 600 psig = 614.7 psia. Calibrate the tranmitter so 4mA is obtained at 14.7 psig and 20mA is obtained at 614.7psig. The span will be 600 psi in both cases.
0 mmHg is equivalent to 0 psia because both represent a pressure of zero relative to absolute vacuum. However, 760 mmHg is equal to 14.7 psia, not 0 psig. 760 mmHg is equivalent to atmospheric pressure, which is the reference point for psig.
30 PSIG is about equal to 45 PSIA. Saturation temperature from the steam tables at 45 PSIA is about 274°F. So the steam would be 274°F, or hotter if superheated.