(1) General term used to describe methods of lining with continuous pipes and lining with discrete pipes. (2) InsertionSee Sliplining. of a new pipe by pulling or pushing it into the existing pipe and grouting the annular space. The pipe used may be continuous or a string of discrete pipes. This latter is also referred to as Segmental SlipliningSee Sliplining. See Lining with Discrete Pipes..