Which boiler type typically employs multiple interconnections for steam and water collection?

The choice of "Header" is correct because in steam and water systems, a header serves as a crucial component that connects multiple pipes or tubes for the collection and distribution of steam and water. Headers are designed to allow for efficient flow management, ensuring that steam can be delivered to various points in a system while returning water back to the boiler.

In high-pressure applications, headers play an even more significant role, as they can handle the high volumes and pressures associated with steam generation in large systems. The interconnections they provide help balance the pressure and flow rates between different parts of the system, which is vital for maintaining efficiency and reliability.

Compared to the other boiler types listed, headers represent a structural component specifically aimed at managing steam and water flow, making them integral for those operational requirements. In contrast, the other options refer to specific types of boilers or configurations, but do not primarily focus on the concept of multiple interconnections for steam and water collection.