Flaring copper tubing +  edge expanding are processes used to connect copper tubing in plumbing, HVAC, and other systems.

To expand a copper tube, a specialized tool is used to stretch the end of the tube, making it wider. This process allows the tube to fit more easily over another tube or fitting, creating a secure and tight seal. The expanded end tube may also be slightly thicker than the rest of the tube to provide additional strength.

While flaring copper tubing, a different tool is used to create a cone-shaped end on the tube. This process creates a wider surface area for the tube to connect with another tube or fitting. This portion would ensure a tight and secure seal. Flaring is often used in applications where the tubing needs to be pressurized, such as in refrigeration or air conditioning systems.

Both copper tube expansion and flaring are important techniques in the plumbing and HVAC industries, ensuring that connections are secure, leak-free, and durable.