Steam boiler tanks
Fire-tube boiler shells and boiler room vessels
In a fire-tube boiler, the shell is a cylindrical pressure vessel through whose water the smoke tubes pass. Shell, tube sheet and furnace thickness come from steam pressure and temperature — these parts see the hardest duty in the whole boiler room.
Each boiler is surrounded by other vessels: a feedwater tank that stores and preheats water before it enters the boiler, a condensate return tank, and a blowdown tank that cools hot water drained from the boiler before it reaches the drain. In larger systems a deaerator replaces the simple feedwater tank.
For a first estimate of dimensions, part thickness and price, use the online boiler calculator, then send your specification for detailed design.
