Which of the following statements is incorrect about rupture members?

The statement about rupture members is not accurate because a rupture member is designed to fail at a predetermined pressure, not specifically temperature. While some rupture members may have temperature considerations as part of their design, their primary function is to relieve pressure safely when it reaches a specific threshold. This is critical to preventing an explosion or catastrophic failure of a system. The focus of a rupture member is on pressure management, as it serves as a safeguard against over-pressurization, ensuring that the system does not exceed safe operating limits.

In contrast, a service valve functions appropriately for isolating portions of systems during maintenance, brine is indeed a medium used for heat transfer applications, and a fusible plug does operate based on temperature to relieve pressure in specific conditions. Each of these statements accurately conveys important aspects relevant to the operation and safety of systems involving fluids under pressure.