The aim of this paper is to present the first steps of multiscale modelling for braided SiCf/SiC composite tubes. A large characterization campaign is needed to provide data on the composite behaviour. For this purpose, a tensile test and an internal pressure test dedicated to the tubular geometry have been developed. Results show a reproducible and typical mechanical behaviour of ceramic composite materials. Finally, the geometrical modelling of the braided preform is introduced.