Which component is primarily used to create connections at specific points in a boiler system?

The component primarily used to create connections at specific points in a boiler system is nozzles. Nozzles are designed to control the flow of fluids, gases, or steam in various systems, including boilers. They can direct flow, create pressure differentials, and ensure that the required amount of fluid is delivered to specific locations within the system. Their specialized design allows them to perform these functions effectively, making them crucial in regulating the operation of boilers.

While ducts, pipes, and valves are essential components of boiler systems, they serve different primary purposes. Ducts are primarily utilized for air or flue gas transmission, pipes are responsible for the transport of fluids, and valves regulate the flow or pressure within pipelines but are not specifically designed to create connections at precise points within a boiler system like nozzles do. Therefore, the role of nozzles in establishing essential flow connections makes them the correct answer in this context.