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.
Best Answer: psia is pounds per square inch absolute, that is it includes atmospheric pressure. psig is the reading you get on a gauge and is atmospheric pressure (14.7 psi) less. psi is just pounds per square inch and it is appropriate to use this when one is talking about pressure difference. Source(s):