A metallic sleeve for bridging a leakage point on a pipe is expanded onto the inner wall surface of the pipe with the aid of an expansion technique. During the expansion process, a gap of approximately 5 to 10 .mu.m occurs between the pipe and the sleeve due to the elastic resilience of the deformed...http://www.google.com/patents/US5400827?utm_source=gb-gplus-sharePatent US5400827 - Metallic sleeve for bridging a leakage point on a pipe
