Abstract: The invention relates to a device for cleaning a cylindrical or conical tube (2) having a smooth wall and placed in a horizontal or an inclined position, said device comprising: a cylindrical body (4) that has an axis X, that is suitable for being inserted axially into said tube, and that, around its periphery, has brush means (6, 7) for brushing the inside wall (1) of said tube (2); a rod (30) fastened to an end face of said body (4); and means for causing said rod (30) and said body (4) to turn about the axis X; said device being characterized by the fact that the cylindrical body (4) has a chamber (12) that is suitable for receiving a cleaning liquid and, on one of its generator lines, it has: a first orifice (14) opening out into a first end of a radial duct (17) which is disposed in said chamber (12) and whose second end (19) is disposed in the vicinity of that wall (20) of said chamber (12) which is situated facing said first orifice (14); and at least one second orifice (13, 15) open to the outside and

Abstract: The device includes a spray system for spraying a fluid against the inside periphery of the tube to be cleaned, and two analogous brushing assemblies, each of which include brushing means and a propelling element which cooperates with the inside periphery of the tube. The device further includes means for moving axially the brushing assemblies towards and away from each other in alternation, which means include a chamber connected to a feed for feeding in fluid under pressure. The spray system includes a reservoir put under pressure by being connected to the chamber. A method of cleaning a tube, in which two brushing assemblies including brushing means are inserted into the tube and are moved towards and away from each other in alteration. A fluid, disposed in a reservoir cooperating with a support system on which the propelling elements are secured, is sprayed against the inside periphery of the tube.