The feed water tank is the major meeting place for cold make-up water and condensate return. At the feed water tank the feed water for the steam boiler is prepared. The feed water tank provides a reserve of water to cover the interruption of make-up water supply. Traditional practice is to have a feed tank with sufficient capacity to allow one hour of steaming at maximum boiler evaporation.
Feed water tank materials Carbon steel-Probably the most common construction materials for feed water tanks. Uncoated, it is a relatively low cost materials but susceptible to corrosion. This weakness can be improved by applying suitable coatings to the surface. Stainless steel-The enhanced life of a properly made feed tank in this material will justify the higher initial cost. Type 304L is generally selected as the most appropriate grade of stainless steel.