Oxygen (O2) pressure relief valves open if the pressure in a pipeline system exceeds the normal level by more than?

The correct answer indicates that oxygen (O2) pressure relief valves are designed to open when the pressure in a pipeline system exceeds the normal level by more than 50 percent. This safety mechanism is crucial in preventing overpressure situations that could potentially lead to hazardous conditions, such as ruptures or system failures.

In the context of oxygen systems, where the risks associated with high pressure can be significantly higher due to the flammable nature of the gas, a relief valve that activates at this threshold ensures that the system remains within safe operational parameters. The 50 percent threshold is a regulatory standard commonly employed in various healthcare and industrial settings to maintain safety.

By having a clear and established limit like this, technicians can have expectations regarding the behavior of O2 systems under abnormal conditions. This knowledge is essential for ensuring the safe operation of biomedical equipment that relies on pressurized oxygen, such as ventilators and anesthesia machines.