In piping systems, what is the purpose of a saddle?

The purpose of a saddle in piping systems is to act as a fitting around a pipe. Saddles are typically used to provide a means of attaching or supporting a branch line, allowing it to connect to the main pipeline without requiring extensive changes or additional fittings. This design helps create a secure and stable connection while maintaining the integrity of the original pipe, ensuring proper flow and reducing the risk of leaks at the junction. The unique shape of a saddle facilitates the distribution of forces and helps accommodate any thermal expansion or contraction that may occur.

In contrast, the other options do not accurately describe the primary function of a saddle. Covering open pipe ends doesn't align with a saddle's purpose, as that is typically done with caps or plugs. Providing structural support is more synonymous with brackets or supports rather than saddles, even though saddles do assist indirectly. Finally, while saddles are crucial in pipe connections, they do not serve the primary role of securing valves, which is specifically handled by valve mounts or brackets designed for that purpose.