Steam Generator, well known as boiler is a tool designed to vaporise liquid to vapour. Hot water or steam is produced by means of transfer of heat to water and combustion, this is provided by an enclosed vessel known as a boiler. The usable steam or hot water under pressure is used for transferring the heat to a process. Heat is transferred to a process using water as a cheap medium. The volume of water increases about 1,600 times when it is boiled, the force produced is nearly the same as that of an explosive of gunpowder. At this stage the boiler becomes extremely dangerous equipment that has to be used with caution. Evaporation occurs when a liquid is heated up to a gaseous state.