Which type of fire protection system utilizes a flexible Inconel tube?

The Fenwal system is notable for its use of a flexible Inconel tube as part of its fire protection technology. This system is designed to provide reliable fire detection and suppression, particularly in aircraft engines and other critical areas where fire risk is a significant concern. The Inconel tube is resistant to high temperatures and corrosion, making it particularly well-suited for environments like those found in aviation.

In the Fenwal system, the Inconel tube contains a fire detection element that expands when exposed to heat, triggering the system to activate and release a fire-suppressing agent. The use of this material contributes to the overall durability and performance of the system under extreme conditions, which is critical for effective fire protection.

The other fire protection systems listed do not utilize a flexible Inconel tube. For instance, the Kidde system uses a different mechanism for fire detection that may involve different materials, while Halons-based systems focus on employing halogenated agents for suppression without the use of a flexible tube. Dry powder systems typically utilize solid chemical agents to suppress fires, rather than a tube-based detection system.