Arrangement of header boxes providing for return diversion of flue gas flow

Full Title

Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body > the boiler body being disposed substantially horizontally, e.g. at the side of the combustion chamber > the fire tubes being in substantially-horizontal arrangement > Arrangement of header boxes providing for return diversion of flue gas flow