Tube sheet with base region having webs and beads between adjacent tube openings

A tube sheet comprising:

• a circumferential edge region for connection to a cover of a collecting tank;
• a base region with openings for accommodating tube ends, the base region having webs provided between adjacent openings, the webs connecting portions of the circumferential edge region situated on mutually opposing longitudinal sides;
• and
• at least one bead that extends from the circumferential edge region with a limited extension only into one portion of the web,
• wherein the circumferential edge region has a U-shaped cross-section formed by a first wall, a second wall and a base, wherein the first wall opposes the second wall,
• wherein the at least one bead has a region of constant depth, a base of the at least one bead, at the region of constant depth, being planar,
• wherein the tube sheet is provided with three parallel planes, the base of the circumferential edge region forming a first one of the three parallel planes, the base of the at least one bead, at the region of constant depth, forming a second one of the three parallel planes and the web forming a third one of the three parallel planes,
• wherein the third one of the three parallel planes is an uppermost plane of the three parallel planes and the first one of the three parallel planes is a lowermost plane of the three parallel planes, and
• wherein, a side of the first one of the three parallel planes is connected to a first side of the second one of the three parallel planes by a first obliquely extending transition and a second side of the second one of the three parallel planes is connected to a side of the third one of the three parallel planes by a second obliquely extending transition, and wherein the first obliquely extending transition is a portion of the first wall.