What is usually the purpose of a union fitting?

• A. To allow for alignment of misaligned pipes.
• B. To connect two pipes securely for high pressure.
• C. To provide a detachable joint for easy maintenance.
• D. To redirect fluid flow at an angle.

Answer: (C)

A union fitting is specifically designed to facilitate the easy separation of connected pipes, which is essential for maintenance purposes. When a pipe system requires repair or replacement, the union fitting allows sections of the pipe to be disconnected without needing to cut the pipes or disturb other connections. This capability is invaluable in systems where access might be limited or in situations where frequent maintenance is anticipated.

In contrast, the other options serve different functions: some fittings are designed primarily for alignment or redirecting fluid flow, while others might focus on securing connections under high pressure. However, the distinguishing feature of a union fitting is its ability to create a detachable joint, making it the ideal choice when maintenance considerations are a priority.