A steam boiler is a device used to create steam by applying heat energy to water. Although the definitions are somewhat flexible, it can be said that older steam generators were commonly termed steam boiler and worked at low to medium pressure (1–300 psi or 6.895–2,068.427 kPa) but, at pressures above this, it is more usual to speak of a steam generator. Source – Wikipedia Purpose of steam boilers For generating power in steam engines or steam turbines In process industries for various processes. For heating the buildings in cold weather and for producing hot water for hot water supply Primary requirements of a steam boiler The water must be contained safely The steam must be safely delivered in the desired condition (as regards its pressure, temperature, quality and the required rate Boiler terms Shell : Consists of one or more steel plates bent into a cylindrical form and welded together. The shell ends are closed with end plates Grate/ Bed...