Goods wagons for special purposes include:
Departmental wagons are used by railway administrations exclusively for their own internal purposes (such as the slag wagons of Class X in Germany which were mainly based on old open wagons of Class O),
Ferry wagons with smaller for traffic travelling to which were designated with a lower case letter f.
the rarely mixed open, flat wagons of UIC Class O, which are equipped with folding sides or stakes and can be used either as flats or as open goods wagons.
Mineral wagons
Railway are not counted as goods wagons.
The UIC’s instructions were sometimes interpreted differently by the various railway administrations, so that it could happen that almost identical wagons were grouped into different classes. In addition wagons had occasionally to be reclassified after slight modifications. For example, an E Class wagon can become an F Class simply through welding on a door.
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