| 摘要 |
A method of lining an existing pipe (11) comprises pulling through it a collapsible, flexible, lay-flat liner (10) having an innermost layer 13 of impervious, elastomeric material which is compatible with the fluid to be carried by the pipe, a textile reinforcing intermediate layer, (14), and an external protective layer (15) of elastomeric material, the said liner having an external peripheral length slightly less than the internal peripheral length of the pipe (11) and being such that flow of said fluid through the liner (10) after the installation thereof expands the liner into non-bonding contact with the internal surface of the pipe. The peripheral extension (diametral swell) of the liner at the intended working pressure of the relined pipe should be less than 10% and preferably less than 5%. A method of sealing attachment of the ends of the liner and a method of forming branch connections to the lined pipe are also disclosed.
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