What is the primary configuration of a Fire Tube Boiler?

The primary configuration of a Fire Tube Boiler features water outside the tubes and flue gases inside. In this design, the combustion gases from the fuel source flow through the tubes, transferring heat to the water surrounding these tubes. This configuration allows for efficient heat exchange, as the hot gases heat the water, producing steam.

This design is commonly used in various applications, including commercial and industrial settings, due to its ability to produce steam at relatively low pressures and its relatively simple construction. Water being outside the tubes means that it can effectively absorb heat from the flue gases, which is essential for efficient operation and energy transfer.

In contrast, configurations where water is inside the tubes and steam or water is outside do not represent the typical operation of fire tube boilers. Understanding the basic principles of heat transfer in this context is crucial for gas technicians, as it impacts the efficiency and operation of boiler systems.