Fuente: WIPO "rice" A method of re-lining a main pipeline (10) having at least one transversely extending pipe (11) connected thereto via a generally annular connection region (12), said method comprising applying an internal lining (10a) to the inner wall of a length of said main pipeline (10) and which overlies the entrance to said transversely extending pipe (11) and also said connection region (12), and forming a hole in the lining (10a) so as to expose said entrance; introducing a re-lining assembly (14, 15) into said pipe (11) from an end thereof remote from said entrance, said assembly comprising a tubular web (14) of resin-permeated material within an elastomeric membrane (15) which is everted by application of fluid pressure to the assembly so as to introduce the assembly into the pipe and so that the now externally located tubular web (14) projects into the main pipeline (10); applying further fluid pressure to the assembly (14, 15) so that the membrane (15) causes the projecting end of the tubular web (14) to flare or deform outwardly and thereby overlie the connection region (12); and inflating a packer (16) which is located in the main pipeline (10) adjacent to the transversely extending pipe (11) to engage with said flared projecting end (13) of the tubular web (14) and to press said end (13) into engagement with the portion of the wall of the main pipeline adjacent to said connection region (12), whereby the resin impregnated in the web (14) is caused or allowed to cure and thereby to bond the web to the lining (10a) of the main pipeline (10).