Fire-tube boilers and water-tube boilers are common types of industrial boilers, each with distinct characteristics and drawbacks. Customers can select the appropriate boiler based on their specific application. Below 

are four key differences between fire-tube and water-tube boilers:

1. Different Media

Water-tube boilers feature fire surrounding water, where water inside the tubes is heated by convection from external high-temperature flue gases.

Fire-tube boilers feature water surrounding fire, where flue gases circulate within the tubes and heat the water outside the tubes to achieve heat exchange.

2. Different Pressure Ranges

Water-tube boilers accommodate a broader pressure range, capable of exceeding pressure limits to meet steam demands above 2.5MPa. Fire-tube boilers are constrained by material wall thickness and pressure 

limitations, typically operating at pressures up to 2.5 MPa.

3. Footprint Differences

Fire-tube boilers feature compact structures. For equivalent output, their external dimensions and equipment weight are lower than water-tube boilers. Water-tube boilers, being larger in size, provide more space for 

superheaters. Consequently, they occupy larger boiler rooms.

4. Structural Differences

Fire-tube boilers feature simple construction, large water and steam capacities, and low water quality requirements. They are commonly used in small-scale industrial processes and residential heating.

Water-tube boilers possess large heat transfer surfaces and excellent thermal efficiency, demanding higher water quality standards. Structurally suited for large-capacity, high-parameter applications in major industrial zones.

Both fire-tube and water-tube boilers have distinct advantages and disadvantages. Enterprises should select the appropriate boiler type based on actual requirements.