What is "butt welding"?

Butt welding refers specifically to a technique in which two pieces of material, typically metal, are joined together along their faces. This method involves aligning the edges of the two pieces so that they are flush with each other, then applying heat and pressure to create a solid joint. This technique is commonly used in various applications, including structural welding and the joining of sheets or plates, as it allows for a strong bond without the need for additional filler material.

While the other options might describe other welding techniques or methods, they do not accurately describe the precise nature of butt welding. For instance, joining pieces along their edges rather than their faces is characteristic of other welding methods. Furthermore, techniques specifically geared toward pipe welding may involve additional considerations like the circular structure of pipes, and methods that use filler materials pertain to different forms of welding, such as MIG or TIG welding, rather than the particular face-to-face joining of butt welding. Understanding this precise definition helps clarify the unique characteristics of this welding method and differentiates it from others in the field.