What does the term "valve" refer to in piping systems?

The term "valve" in piping systems specifically refers to a device that regulates the flow of fluids within the pipe system. Valves play a crucial role in controlling the movement and pressure of various substances, such as liquids and gases, within industrial or plumbing systems. By adjusting the position of the valve, operators can start, stop, or modulate the flow, which is vital for maintaining desired system performance and safety.

Understanding the function of valves is critical for anyone involved in pipefitting, as they ensure the system operates efficiently and safely. Valves come in various types, including gate, globe, ball, and check valves, each serving specific functions and applications.

The other options do not accurately define what a valve is in the context of piping. Connectors for joining hoses serve a different purpose, as do tools for measuring pressure. Lastly, while some fittings may be specifically designed for steam systems, valves have a much broader application, serving various functions across different piping systems, not just steam.