The invention relates to a method for producing tubular bodies (1) which have an inner circumferential surface and an outer circumferential surface (8) for packaging tubes, consisting of a strip-shaped film substrate (2) which has a barrier layer (19), in particular against moisture and/or oxygen, which has at least one weldable plastic layer (3), and which comprises a beveled first edge face (5) that extends in the longitudinal direction of the film substrate (2) and a beveled second edge face (6) that is spaced from the first edge face (5) by the width of the film substrate (2). The first edge face (5) and the second edge face (6) are arranged opposite each other, thereby forming a tube shape, and are welded together under the effect of heat. According to the invention, the first and the second edge faces (5, 6) are pressed against each other during the welding process such that the barrier layer (19) is compressed, thereby forming a wave shape.