In pipefitting, what does an elbow do?

• A. Connects pipe segments at an angle
• B. Extends the length of a pipe
• C. Seals a pipe connection
• D. Supports horizontal structures

Answer: (A)

An elbow is a type of fitting used in pipefitting that connects two segments of pipe at an angle. This allows for changes in direction within a piping system, which is essential for routing pipes around obstacles or guiding them to specific locations. Elbows come in various angles, such as 90 degrees or 45 degrees, enabling flexibility in the design and layout of the plumbing or heating system.

In contrast, other options do not describe the function of an elbow accurately. For example, extending the length of a pipe would typically involve using straight pipe sections or couplings rather than elbows. Sealing a pipe connection is the function of fittings like caps or plugs, which are designed to close off the end of a pipe. Supporting horizontal structures is the role of brackets or hangers that provide stability to the piping system, rather than elbows. Thus, the main purpose of an elbow in pipefitting is distinctly to facilitate changes in direction by connecting pipes at an angle.