Brazed joints in piping systems must use an alloy with a melting temperature that exceeds what degree to ensure integrity during a fire?

In the context of medical gas systems, the integrity of brazed joints in piping systems is crucial, particularly when considering the potential exposure to high temperatures, such as those that may occur during a fire. The correct choice specifies that the alloy used for brazing must have a melting temperature that exceeds 1,000ºF.

This requirement is based on safety standards and codes which dictate that materials used in medical gas systems should maintain their integrity under various conditions, including fire. If the melting temperature of the brazing alloy is lower than the temperatures encountered in a fire, it could melt, leading to joint failure and potential leaks of gases, which could have serious safety implications.

Therefore, using an alloy with a melting temperature higher than 1,000ºF ensures that the joints remain intact and do not compromise the system's integrity even when exposed to extreme heat, thereby safeguarding both the system and those who rely on it.