What is the absolute pressure of a steam boiler carrying 160 psig?

To determine the absolute pressure of a steam boiler operating at 160 psig, it is important to understand the difference between gauge pressure (psig) and absolute pressure (psia). Gauge pressure is the pressure measured relative to atmospheric pressure, while absolute pressure accounts for atmospheric pressure.

Atmospheric pressure at sea level is approximately 14.7 psi. Therefore, to convert gauge pressure to absolute pressure, you add the atmospheric pressure to the gauge pressure.

In this case, you would take the 160 psig and add the atmospheric pressure:

160 psig + 14.7 psi = 174.7 psia.

This calculation provides the absolute pressure of the steam boiler. The result of 174.7 psia accurately reflects the true pressure, incorporating the atmospheric pressure into the measurement, which is why this answer is correct.