Ceinture 21 to 35 were a class of fifteen French 0-6-0T locomotives of the Syndicat d'Exploitation des Chemins de fer de Ceinture de Paris. built in 1899 for pulling suburban passenger trains.
The Nord made several changes: the use of a Belpaire firebox, higher boiler pressure (10 to 12 kg/cm2, 981 to 1,180 kPa, 142 to 171 psi), Adams safety valves, smaller driving wheels (1,540 to 1,440 mm, 5 ft 5⁄8 in to 4 ft 8+3⁄4 in) and Nord-type sandboxes.[1][2]
In 1934 at the dissolution of the Syndicat they passed to the Nord who renumbered them 3.901 to 3.915. Six were scrapped in 1936, leaving nine to pass to the SNCF at nationalisation in 1938. The SNCF renumbered them 2-030.TB.1 to 2–030.TB.9.
The remaining locomotives were scrapped between 1939 and 1953. None were preserved.