A manometer containing an oil with a specific gravity SG of

A manometer containing an oil with a specific gravity (SG) of 0.92 is connected across an orifice plate in a horizontal pipeline carrying seawater (SG 14 1.1). If the manometer reading is 16.8 cm, what is the pressure drop across the orifice in psi? What is it in inches of water?

Solution

The pressure drop = 9.81*1100*.168((1/.92)-1)

= 157.6424 Pa

Or in psi = 0.022 psi

Pressure drop in inches of water = 0.6299 inches of water