Pipe repair or joining collar

A pipe repair collar having a longitudinal axis and comprising a pair of rigid arcuate casing members with clamping means for drawing the members together around a damaged pipe or a pair of pipe ends, with interposition of at least one corresponding elastomeric arcuate sealing means, and wedges located between the casing members and at least a part of the sealing means in the regions of the clamping means and engaging the casing members so as to slide inwardly and generally tangentially with respect to the casing members away from the clamping means as the latter are drawn together thus to force the sealing means radially inwards in said regions, characterized by pairs of mutually abutting resilient sealing strips extending parallel to the axis of the collar and projecting from opposed faces of the wedges and located in channels therein to form a longitudinal seal between the wedges;

• each of said channels having a base therein;
• and in that in at least one longitudinal region of each pair of abutting sealing strips, one of the pair is substantially flush with the rim of its associated channel while the other of the pair projects above its channel such that, during assembly, if the wedges and thus the sealing strips, are radially displaced, the projecting strip may ride laterally onto the flush strip to restore alignment of the sealing strips.