An S.A.E flare fitting features a shoulder with what angle?

An S.A.E. (Society of Automotive Engineers) flare fitting is designed with a shoulder that features a 45-degree angle. This specific angle is crucial because it allows for a proper seal when the fitting is tightened, ensuring that the connection between pipes and components in a refrigeration or air conditioning system is leak-proof.

The 45-degree flare creates a larger contact area compared to other angles, which enhances the sealing ability between the flared end of the tubing and the fitting. This design is especially important in high-pressure systems, such as those found in air conditioning and refrigeration applications, where any leaks can lead to efficiency loss and potential damage.

Understanding the angle of the shoulder is vital for technicians working in HVAC/R, as it helps ensure they are using the correct fittings for their systems, which can greatly impact system performance and reliability.