What type of joint involves a conical spread compressed by a flare nut?

The correct answer involves a flared joint, which is characterized by its unique design and the way it functions. A flared joint is made by taking a pipe and creating a conical shape at the end, which allows the joint to form a tighter seal when compressed by a flare nut on a fitting. This type of joint is often used in applications involving gas lines or hydraulic connections because it provides a strong, leak-proof connection that can withstand high pressures.

The conical shape increases the surface area of the joint, enhancing the mechanical grip and ensuring that even under pressure, the joint remains secure. The flare nut's role is crucial as it pulls the conical shape tightly against the fitting, creating an effective seal that minimizes the risk of leaks, which is vital for safety and efficiency in mechanical systems involving fluids or gases.

The other joint types listed, such as welded, soldered, and coupled joints, have different characteristics and methods of joining materials. For instance, welded joints involve melting and fusing materials together, while soldered joints utilize a filler metal melted below a certain temperature to create a bond. Coupled joints typically refer to connections that can be mechanically separated without damaging the components. Each of these methods has its own specific applications, but