When equipped with an overpressure protection device, a high pressure regulator must limit the outlet pressure of the second-stage regulator to __________ when the regulator seat disc is removed.

A high-pressure regulator equipped with an overpressure protection device is designed to limit the outlet pressure to a specific maximum to ensure safety and proper functioning of downstream equipment. When the regulator seat disc is removed, it becomes crucial to have a clearly defined maximum outlet pressure to prevent potential hazards such as over-pressurization.

In this context, the appropriate limit set is 2.0 psig. This pressure limit is aligned with safety standards and regulations for propane systems, ensuring that even in adverse conditions, the system does not exceed this limit, thereby minimizing risks.

The choice of 2.0 psig as the maximum allowed pressure helps to maintain safe operational levels while allowing the system to function effectively without causing damage or posing safety risks.