Liner for repairing a lateral connection of a pipeline

A liner for lining a connection between a main pipeline and a lateral pipe, said liner including

• a main pipeline lining part that in use forms a tubular portion for lining an inner circumferential portion of the main pipeline and a lateral pipe lining part that in use forms a tubular portion for lining an inner circumferential portion of the lateral pipe,
• wherein between the lateral pipe lining part and the main pipe lining part there is a transition zone that in use is arranged to line a junction zone between the main pipeline and the lateral pipe,
• said transition zone of the liner being formed integrally with the main pipeline lining part and the lateral pipe lining part such that there is no circumferential join or seam;
• and
• wherein the liner is made from two blanks of material which are placed together to overlap then stitched or otherwise joined together adjacent to or along three edges to form connections establishing the main pipeline lining part and the lateral pipe lining part.

A liner for lining a connection between a main pipeline and a lateral pipe, said liner comprising

• a main pipeline lining part that in use forms a tubular portion for lining an inner circumferential portion of the main pipeline and a lateral pipe lining part that in use forms a tubular portion for lining an inner circumferential portion of the lateral pipe, and
• a transition zone located between the lateral pipe lining part and the main pipe lining part of the liner, said transition zone arranged in use to line a junction zone between the main pipeline and the lateral pipe, said transition zone of the liner being formed integrally with the main pipeline lining part and the lateral pipe lining part of the liner such that there is no circumferential join or seam,
• wherein the liner has a first shape prior to installation so that when the material of the liner is stretched during installation the liner has a second shape different than the first shape that is substantially the same as the inner circumferential shape of the connection;
• and wherein the liner is made from a single blank of material which is folded along a line of symmetry and then stitched or otherwise joined together adjacent to or along two edges to form connections establishing the main pipeline lining part and the lateral pipe lining part.