When are steam valves required in a piping setup?

Steam valves are required for each boiler outlet to control the flow of steam that is being distributed from the boiler to the piping system. This is crucial for both operational efficiency and safety, as it allows for the isolation of the boiler during maintenance or in the event of a malfunction, preventing potential hazards such as steam leaks or pressure buildup within the system. By having a valve at each outlet, operators can manage steam distribution and control, ensuring that the system can be maintained without interrupting the entire operation.

In contrast, while valves may be used in other areas of a steam system, such as transitions in piping size or return line connections, these are not mandated by the same safety and operational requirements specific to the outlets of the boiler. The purpose of a valve at the boiler inlet is different; it primarily serves to control water supply to the boiler rather than steam distribution. Therefore, the necessity of steam valves is most critical at each outlet to ensure proper operation and maintenance of the steam system.