What is the proper term for a device that helps to guide and support pipes?

The proper term for a device that helps to guide and support pipes is "hanger." A hanger is specifically designed to hold pipes in place and can accommodate the weight of the pipe while allowing for thermal expansion and movement. This ensures that the pipes are securely supported and organized, preventing sagging or misalignment.

Hangers are often used in various plumbing and piping systems to maintain proper positioning and alignment, especially when dealing with horizontal runs of pipe. They are crucial in maintaining the integrity of the piping system as they help to distribute the load and minimize stress on the joints and fittings.

Other devices mentioned, such as clamps and brackets, serve different functions. While clamps can secure pipes tightly together or to a structure, they are typically not used to suspend pipes from above. Supports generally refer to broader systems that might include hangers, but in this specific context, "hanger" is the most accurate term for the device intended specifically for guiding and supporting pipes.