Abstract: Apparatus for the in-situ repair of a pipe comprises a pair of trough-like units each of which has an arcuate wall and each of which is of such size that the two units may closely encircle the pipe. One unit has circumferentially spaced shoulders from which flanges diverge outwardly, and the other unit has free side edges that may be accommodated between the flanges in confronting relation with the shoulders. Clamps may be applied to the assembled units to maintain them in encircling relation with the pipe, the shoulders preventing the application of crushing force on the pipe.