Cured in place lateral seal for relining of pipelines and method of manufacture

摘要

A cured in place lateral seal impregnated with a curable resin in the form of a "floppy top hat" for sealing the connection between an existing main conduit and a lateral connection is provided. The seal includes a brim portion bonded to a relatively short tubular section with the resin impregnable surfaces facing each other. The seal is formed by placing an annular ring about an opening in a template in the form of a pipe having a dimension and opening corresponding to the existing conduit and lateral, placing a tubular section of cured in place lining through the ring and the opening and bonding the tubular portion to the brim portion. The seal is impregnated with a resin by sealing the end of the tubular portion and then by placing the seal into a container with resin and drawing a vacuum to wet out the impregnable layer. The lateral seal is then ready for installation using a remote launching device having an expandable bladder which places the brim against the main pipeline about the lateral opening and everts the tubular portion into the beginning of the lateral pipeline.