Abstract: Industrial fuels comprised of mixtures of asphaltenic heavy hydrocarbon fractions and light fractions are provided wherein the flocculation of asphaltenes is minimized by the addition of from 50 to 5000 ppm of an additive composed of a constituent A and/or a constituent B to render the composition homogeneous and stable. Constituent A results from the condensation of a linear N-alkyl polyamine with a cyclic anhydride and constituents B results from the reaction of an ethoxylated amine with a carboxylic acid of C.sub.8 to C.sub.30.

Abstract: Induction device fitted inside a tank for drawing in fluids such as liquid fuels.Said device comprises an enclosure resting on a tray, said enclosure being provided at its base with vertical directional slots communicating with the tank, and at its upper part with a member adapted to connect the enclosure with the tank, and said enclosure containing, on the one hand, an induction pipe with an end portion which is bent towards the upper part of the enclosure and comprising a series of orifices distributed over its length, and on the other hand, a fluid return pipe ensuring the warming up of the enclosure.The invention is used to help drawing certain fuels into a tank.