Which type of boiler is characterized by a large volume of water and specific regulations concerning horsepower size?

The firetube boiler is characterized by a large volume of water and has specific regulations regarding horsepower size. This type of boiler operates by having flue gases from a combustion process pass through tubes surrounded by water. The large volume of water allows for better heat absorption and more efficient steam generation. The construction typically enables them to handle a significant amount of steam and water, which is essential for various industrial applications.

Moreover, firetube boilers are often subject to strict regulations concerning their horsepower ratings, ensuring safe and efficient operation. These regulations are crucial because they help maintain safe pressure levels and determine the appropriate size for the intended application. This is particularly important in industries where large quantities of steam are necessary for processes such as heating, power generation, or manufacturing.

The other types, while also important in their own rights, do not specifically emphasize the combination of large water volume and horsepower regulations in the same way that firetube boilers do.