Method for producing a gas or liquid tank

A method for producing a hollow body having a drum-shaped circumferential wall, comprising:

• feeding the circumferential wall of the hollow body through at least one pair of rollers to form an internal profile on the circumferential wall, the at least one pair of rollers including a rotatably-supported internal profiling roller and a corresponding rotatably-supported external counter-pressure roller, wherein the at least one internal profiling roller circulates along a first surface on an internal side of the circumferential wall while applying pressure to the first surface to form the internal profile, the at least one external counter-pressure roller maintains direct contact with a second surface of the circumferential wall that is opposite to the internal side of the circumferential wall, and the at least one external counter-pressure roller rotates in a direction opposite to that of the internal profiling roller, such that the internal profile is formed on the circumferential wall in a non-cutting manner, and the internal profile is configured to reinforce the circumferential wall of the hollow body by forming a plurality of longitudinal ribs on the workpiece, each of the longitudinal ribs having a longest extent that extends along an axial direction of the circumferential wall;
• the at least one pair of rollers constitutes a plurality of pairs of rollers through which the workpiece is fed;
• the plurality of pairs of rollers comprising a plurality of roller drives, wherein each internal profiling rollers among the plurality of pairs of rollers is provided with a respective roller drive among the plurality of roller drives.