Iam measuring pressure in a piping system. my gauge reads 75 psig. the barometer in the lab reads 30.07 in hg.
what is the pressure in the piping system in psia?

The pressure in the piping system is approximately 76 psia

Explanation:

The pressure in the piping system in psia, can be obtained using Pascal's Principle:

Where;

is the absolute pressure in the piping system

is the gauge pressure in the piping system

is the atmospheric pressure

Given;

= 75 psig

Barometric pressure = 30.07 in Hg

Converting barometric pressure to atm

1 in Hg ---------------------> 0.0334211 atm

30.07 in Hg ---------------> ?

= 30.07 X 0.0334211 atm

= 1.004973 atm

= 76.004973

The pressure in the piping system is approximately 76 psia