kPaig

kPaig refers to kilopascals gauge. It is a unit of pressure measurement commonly used in engineering and industrial applications. The unit is derived from the pascal (Pa), the SI unit of pressure, which is defined as one newton per square meter. The prefix "kilo" (k) indicates a factor of 1000, so 1 kilopascal is equal to 1000 pascals.

The "g" in kPaig stands for "gauge." This signifies that the pressure reading is relative to the ambient atmospheric pressure. In other words, a kPaig reading indicates the pressure above the surrounding air pressure. This is in contrast to absolute pressure (kPa), which is measured relative to a perfect vacuum.

Gauge pressure is often used to measure the internal pressure of a system, such as a tire, a pipeline, or a tank. For example, if a tire is inflated to 300 kPaig, it means the pressure inside the tire is 300 kilopascals higher than the pressure of the air outside the tire. To determine the absolute pressure inside the tire, one would add the local atmospheric pressure to the gauge pressure.

The use of kilopascals gauge is prevalent in many countries that have adopted the metric system. It offers a convenient and standardized way to express pressure differences in various technical contexts.