What does "swaged" refer to in joining tube ends for repairs?

In the context of joining tube ends for repairs, "swaged" refers to the process of forming the tube to fit another surface. This method involves deforming the end of a tube to create a snug fit with another component or tube. It can enhance the integrity of the connection and ensure a tight seal, which is crucial in fluid systems to prevent leaks.

Swaging is typically performed using specialized tools that apply pressure to the tube end, reshaping it without losing material. This process is often used when making connections in hydraulic or pneumatic systems, allowing for more robust and reliable joints that can withstand pressure.

The other options involve different techniques that do not accurately describe the swaging process. Bending the tube does not create the snug fitting that swaging accomplishes. Using a mechanical joint suggests a different type of connection that doesn't involve deforming the tube itself. Lastly, using heat to mold the connection aligns more closely with methods like brazing or welding rather than the cold working process of swaging. Thus, forming the tube to fit another surface accurately captures the essence of what swaging entails in tube repair applications.