Carriage for tubular rails (1) that can be moved on a set of tubes or a tubular rail (18), said carriage for tubular rails (1) comprising a structure (2) on which at least four wheels for rails (3) are provided ), more specifically two wheels for rail (3) on a front axle (4) and two wheels for rail (3) on a rear axle (5), in which on the structure (2) a driving means is also provided for move the carriage for tubular rails (1) over the tubes, the driving means comprising at least a first driving wheel (11), located between the front axle (4) and the rear axle (5), characterized in that it further comprises a second driving wheel (12), in which the first driving wheel (11) and the second driving wheel (12) have mutually different diameters, and either - a motor (10) and, between the engine (10) and the first wheel drive (11), a first transmission with a first transmission ratio and, between the engine (10 ) and the second driving wheel (12), a second transmission with a second transmission ratio； - or two motors, in which a first motor is directly or indirectly connected to the first driving wheel (11), and in which a second motor is directly or indirectly connected to the second driving wheel (12), and a unit of control that can control the motors with an appropriate relationship； so that both driving wheels (11, 12) can be driven at different but mutually coordinated rotation speeds, in which the first driving wheel (11) is located on the structure (2) so that it can cooperate with the tubular rail ( 18), and in which the second driving wheel (12) is located on the structure (2) so that it can cooperate with the substrate, all this when the carriage for tubular rails (1) is partially placed on the tubular rail ( 18) and is partially located on a common substrate.Carro para raíles tubulares (1) que puede desplazarse sobre un conjunto de tubos o un raíl tubular (18), comprendiendo dicho carro para raíles tubulares (1) una estructura (2) sobre la que se proporcionan a
