The here presented master’s thesis work, conducted at Thales Alenia Space, in Turin, consists in the study of the design of tanks for cryogenic propulsion, exploiting respectively LOx and LCH4 as oxidizer and fuel, together with the aspects inherent to the manufacturing process, for a new concept of rockets based on the possibility of the first stage reusability, aimed to reduce costs. Under the supervision of my company tutor, Ing. Marco Nebiolo, head of TAS mechanical design, I had the possibility to participate to this European project – shared by a pool of manufacturers – contributing actively to the choices of Tank design.