What does PSIG measure?

PSIG stands for Pounds per Square Inch Gauge, and it specifically measures gauge pressure. Gauge pressure is defined as the pressure relative to the ambient atmospheric pressure. This means that a PSIG measurement reflects how much pressure is exerted above and beyond the surrounding atmospheric pressure.

For example, if a gauge displays a pressure of 30 PSIG, it indicates that the pressure is 30 pounds per square inch greater than the atmospheric pressure at that location. Gauge pressure is commonly used in various applications, such as measuring tire pressure, operating boilers, and monitoring fluid systems, where it is essential to know how much pressure is in excess of the atmospheric conditions.

Understanding PSIG is crucial for operators since it helps them ensure that systems function within safe operational limits and helps them troubleshoot pressure-related issues effectively.