The 2015 Inventory of Air Emissions released today shows the Port of Los Angeles has largely continued to preserve clean air gains. The 2015 Inventory of Air Emissions released today shows the Port of Los Angeles has largely continued to preserve clean air gains.
PSI Definition: PSI is a unit of pressure expressed in pounds of force per square inch of area. It stands for Pounds per Square Inch. 1 PSI = 6894 Pascals = 0.070 atmospheres = 51.715 torr. Up Next. Up Next.
âºâº Definition: Pound/square inch. Psig (pound-force per square inch gauge) is a unit of pressure relative to the surrounding atmosphere. By contrast, psia measures pressure relative to a vacuum (such as that in space).At sea level, Earth's atmosphere actually exerts a pressure of 14.7 psi.sig (pound-force per square inch gauge) is a unit of pressure relative to the surrounding atmosphere. By contrast, psia measures pressure relative to a vacuum (such as that in space).