A water-tube is a type of boiler that uses water-filled tubes to generate steam. In this design, water circulates through the tubes, which are heated by combustion gases. This allows for efficient heat transfer and quick steam production, making water-tube boilers suitable for high-pressure applications. Water-tube boilers are commonly used in power plants and industrial processes. They can handle large volumes of steam and are known for their ability to operate at high pressures and temperatures. This makes them essential in various industries, including energy and manufacturing.