METHOD FOR REGENERATION OF EXISTING PIPELINE

PROBLEM TO BE SOLVED: To efficiently and quickly regenerate an existing old pipeline, when regenerating the pipeline by laying a new pipe to a main pipe connected with an attachment pipe, by installing a connection pipe for connecting the pipe with the attachment pipe with high reliability.SOLUTION: A regeneration method includes: a step of attaching a holder 5 to the connection port of the attachment pipe 2 being on the way of the main pipe 1; a step of drilling an attachment hole 10 of the connection pipe 7 to the pipe 100; a step of performing the alignment with the attachment pipe 2 by transporting the pipe 100 into the main pipe 1; a step of arranging the connection pipe 7 between the pipe 100 and the attachment pipe 2 by inserting and holding the connection pipe 7 in the sleeve 51 of the holder 5; a step of integration by filling a bonding agent into a clearance portion between the holder 5 and the connection pipe 7, and a connecting portion between the connection pipe 7 and the pipe 100; and a step of applying a sealing treatment to the bonding part between the holder 5 and the connection pipe 7.