Firetube Boilers and Watertube Boilers

Firetube Boilers: Firetube boilers are also know as shell boilers. These boilers are the most commonly used boilers in the market. In the firetube or shell boilers the water is surrounded by the water. The water which surrounds the shell or firetube is heated by sending the hot gases or fire which is produced by the burner through the shell or firetube. The hot gases or fires are allowed four times through the tubes in the boiler before letting the out of the boilers. These tubes are generally set at the banks of the boilers. The firetube boiler systems can release up to 25,000lbs or 750hp of steam per hour. About 80% of the boilers that are in use today belong to this particular category.

Watertube Boilers: In the Watertube Boilers the tubes are arranged vertically in the shell. Then the water is filled in the shell which is heated by sending the hot fuel or hot gases through the tubes. Generally Watertube boilers are built in rectangular shape with two or three drums. The drums are arranged at the top and bottom, where top drum is used to separate water and steam and the bottom drum is used to collect he sludge. Watertube boilers are usually utilized when more than 750hp of steam per hour is required.

Boiler Tube