Pressure-resistant container for liquids, gases or loose material composed of two or more shells

A pressure-resistant container for liquids, gases or loose material composed of at least two part-cylindrical shells which have mutually parallel axes and intersect each other so as to form troughs between the tops and bottoms thereof, respectively, and end walls, each of which is formed by two halves of a cap-shaped member and a central shell element interconnected between section edges of said halves in a manner closing an opening between the section edges of the halves, wherein each central shell element is curved about a horizontal transverse axis, the radii of the curvature of the central shell element corresponding to that of the section edges of the halves of the cap-shaped member between which it is interconnected, and is provided, at opposite ends thereof, with vertical end surface portions which are, at ends of the part-cylindrical shells, joined at their edges along the height of the longitudinal troughs formed between the tops and bottoms of the part-cylindrical shells of the container by their intersection, whereby said central shell element forms tunnels respectively interconnecting the tops and bottoms of said part-cylindrical shells.