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.
PSI and PSIG-- Pounds per Square Inch, and Pounds per Square Inch Guage. Both are units of measure to indicate the pressure on a surface. Technically, PSI starts at zero relative to a true vacuum (such as that in space).