Abstract: A tubular metal shell (10) with mutually overlapping ends serving to line the insides of damaged sewer pipes (22) possesses an intermediate portion (18) located between two end portions (16), the intermediate portion (18) having, as a result of a plurality of axial slots, a lower resistance to distortion than the end portions (16). When such a shell (10) is installed in a sewer pipe with offset connecting sleeves in such a way that the intermediate portion (18) of the shell (10) where the material has been weakened reaches the region of radial offset, the intermediate portion (18) can distort, thus forming a transition between the two radially offset sections of pipe (24, 26). At least the intermediate portion (18) is sealed all round with an elastic sealant or a hose. The repair shell (10) is particularly suitable for repairing sewer pipes with offset connecting sleeves.