The main function of a steam boiler is to producing, storing and troubling the vapor. The liquid contained boiler is nothing but a shell and the heat energy produced while burning of fuel will be moved to water, and then it converts into steam at the required pressure as well as temperature.

The main components of this boiler mainly include a shell, furnace, grate, mountings, water space, accessories, refectory, level of water, scale, foaming, lagging, and blowing off.