What is a gage pressure? What does it mean by the “withstand pressure”?

Answer 1

Gauge pressure is simply the pressure measured relative to some other pressure, rather than measured relative to zero.

So, when you inflate your tires to 30 psi (pounds per square inch), the 30 psi does not refer to the actual pressure inside the tire, but rather how much pressure ABOVE atmospheric pressure (14.7 psi) is in the tires.

So, 30 psi gauge pressure, measured relative to atmospheric pressure, is 44.7 psi of actual pressure.

Answer 2

Gauge pressure is relative to the ambient atmospheric pressure. For example, a typical "gauge pressure" gauge that is not connected to anything will read zero, but an "absolute pressure" sensor would read the current atmospheric pressure.

I believe that "withstand pressure" is the maximum pressure the gauge can be subjected to without damage or is it without destruction, I'm not sure which, this may be well above the measuring range.

Answer 3

Gauge ( gage) pressure is the Pressure taken when ignoring the atmospheric pressure as in Zero psig. (Pounds/sq.in.gauge).
(Psig = Psia - 14.7 and, Psia = Psig + 14.7).
When the atmospheric pressure is included, it's psia (Pounds/sq.in.Absolute as in 14.7psia).
A pressure of 240mmHg gauge means a pressure 240 mmHg above the normal pressure of 760mmHg
= 1,000mmHg Absolute).

To 'Withstand' a certain pressure means, for example, that a container can hold or take a pressure of up to the stated value.

Answer 4

Gage pressure is measured pressure by a pressure gage. To withstand pressure means not to implode, explode, function erratically or be destroyed by pressure.