Patent ID: 7950418

Claim:
Method for repairing a steel pipe of a pipeline by means of at least one shell made of steel and adapted to the external shape of the pipe, the at least one shell being secured to the external wall of the pipe by an intermediate layer between the inner side of the shell and the external wall of the pipe, wherein the intermediate layer is an adhesive, the inner side of the at least one shell is substantially completely coated with the adhesive, and the securing of the shell is effected by application of a force that acts at least in the radial direction and by applying heat to the adhesive, characterized by the steps of: selecting an adhesive that is applicable as a liquid or a pasty medium, has a dry or self-adhering surface at ambient temperature after being applied, softens by applying heat and cross-links to form a duromer on thermal activation; coating said inner side with said liquid or pasty medium; drying the coating; securing said coated shell at the external wall of the pipe; softening the coating by applying heat; and thermally activating the adhesive to form a duromer.