Can a boiler be connected to a common header?
From BS 2790, Section 8.8.3. Where two or more boilers are connected to a common header, in addition to the boiler main stop valve, a second valve shall be incorporated in the steam connection, and this valve shall be capable of being locked in the closed position.
When do you need two stop valves in a boiler?
Two stop valves are required when two boilers are connected to a common steam header or when a single boiler is connected to a steam header having another steam source. In this case boiler(s) should have at least one manhole.
Why are interconnecting steam headers so important?
The design of the interconnecting steam header is highly important. Figure 3.8.1 shows a common method of connecting four boilers: a method that is frequently a source of problems.
What happens if you have more than one boiler?
With one boiler, the result is the inability to supply the maximum weight of steam that the boiler is capable of generating. A drop in pressure across the distribution system will result. However, with two or more boilers interconnected, problems with boiler operation can also result.
From BS 2790, Section 8.8.3. Where two or more boilers are connected to a common header, in addition to the boiler main stop valve, a second valve shall be incorporated in the steam connection, and this valve shall be capable of being locked in the closed position.
Two stop valves are required when two boilers are connected to a common steam header or when a single boiler is connected to a steam header having another steam source. In this case boiler(s) should have at least one manhole.
The design of the interconnecting steam header is highly important. Figure 3.8.1 shows a common method of connecting four boilers: a method that is frequently a source of problems.
With one boiler, the result is the inability to supply the maximum weight of steam that the boiler is capable of generating. A drop in pressure across the distribution system will result. However, with two or more boilers interconnected, problems with boiler operation can also result.
