Belpaire firebox

The Belpaire - standing boiler is a special type of standing boiler for steam locomotives with an approximately rectangular cross section and a flat ceiling. This extends beyond the sides of the cylindrical curvature of the boiler and is therefore often be seen from the outside squared bumps are on the side (standing ) boiler before the cab. The Belpaire - firebox had more space for vapor formation than adapted to the cylindrical shape of the long boiler conventional firebox. Furthermore, this design permits a clearer anchoring, in which the ceiling studs are everywhere nearly perpendicular to the wall. Also wash hatches can be attached to the upper longitudinal edges, which provide a simple horizontal and vertical access to the boiler inspection and cleaning.

It is named after the Belgian engineer Alfred Belpaire ( 1820-1903 ). Steam locomotives with Belpaire - standing boilers were built in Europe and North America. Known examples of German locomotives with Belpaire - standing boilers are the Prussian P 10 or the Prussian T 20