What are the two types of flares used in aircraft plumbing systems?

In aircraft plumbing systems, the two types of flares commonly used are the single flare and the double flare. Single flares are typically employed in situations where the connection does not need to withstand high pressures, such as in low-pressure fuel or hydraulic lines. This type of flare involves shaping the end of the tubing into a cone that matches the receiving fitting, allowing for a secure, leak-free connection.

The double flare, on the other hand, provides added strength and integrity to the connection, making it suitable for high-pressure applications. In this method, the tubing is first flared outward, then bent back on itself, creating a double layer that can withstand greater pressure without risk of failure. This is particularly important in aircraft systems where safety and reliability are critical.

Both types of flares require precise preparation and installation to ensure proper sealing and prevent leaks, essential in maintaining the integrity of the aircraft’s plumbing systems.