The present invention relates inter alia to a tank container (1) for the storage and/or transport of gas and/or liquid, said tank container comprising a frame (3) and an elongated and essentially cylindrical tank vessel (5) comprising two head-ends (13) and a shell (2); said frame comprising at each head-end a head-end frame (4) comprising two top corner fittings (7), two bottom corner fittings (7) and two upright container posts (21); in which said shell at each head-end comprises an annular end frame doubler plate (23); and in which at each head-end said container posts are permanently connected to said end frame doubler plate by means of a bridge element (22) disposed between said container post and said end frame doubler plate and permanently connected to said container post and said end frame doubler plate, preferably by a weld.
