PSIG is an acronym for "pounds per square inch gauge," which is a unit of pressure measurement commonly used in engineering, physics, and industrial contexts. The term "gauge" is appended to differentiate it from other pressure measurement units, such as "psia" (pounds per square inch absolute).
PSIG refers specifically to the pressure above atmospheric pressure, measured in pounds per square inch. It represents the difference in pressure between the measured value and the atmospheric pressure at that location.
In practical terms, PSIG is often used to measure the pressure inside a closed system or vessel, such as pipes, tanks, or hydraulic systems. This measurement is essential for ensuring the safe and efficient operation of various equipment and processes.
The value of PSIG can be positive or negative, depending on whether it is above or below atmospheric pressure, respectively. For instance, if a pressure gauge reads 10 psig, it means that the pressure inside the system is 10 pounds per square inch greater than the atmospheric pressure. Conversely, if it reads -5 psig, it indicates a pressure that is 5 pounds per square inch lower than the atmospheric pressure.
PSIG is a widely used unit in different fields, including manufacturing, oil and gas, HVAC (heating, ventilation, and air conditioning), and automotive industries, where precise pressure measurements are required for efficient functioning and safety.
