| 摘要 |
The invention concerns a tube made up of shells (3, 4, 5) placed on top of one another, mutually connected, in the longitudinal direction, by at least one sealing surface and at least one assembly zone. Each assembly zone (7, 11), consisting for example of a weld seam, is offset by a predetermined distance relative to the sealing surface (6, 8). Preferably, said assembly zone (7) is formed at some distance, radially outwards, beside the sealing surface (6) or the assembly zone (11) is formed on each of the vertical elements (9, 10) starting from the tubes, on the shells (4, 5). |
