A standard single flare on copper tubing is made at a __________ angle.

A standard single flare on copper tubing is made at a 45 degree angle. This specific angle is chosen because it provides optimal sealing properties and strength to the joint. The 45 degree flare creates a larger surface area for the connection, enhancing the seal and ensuring that the joint can withstand pressure and vibration commonly encountered in plumbing and HVAC applications. This design helps to minimize the risk of leaks, which is crucial for maintaining the integrity of the system.

Choosing a 45 degree angle strikes a balance between ease of fabrication and adequate sealing performance. Other angles, such as 30 degrees or 60 degrees, would not create the same effective seal or structural integrity. A 90 degree angle, while potentially easier to visualize, would not allow for a proper flare fit, leading to poor connection and potential failures. Thus, the 45 degree angle is the industry standard for creating a reliable and effective flare joint in copper tubing.