Spigot-and-socket joint

A ring seal for a spigot-and-socket joint for connecting two pipes, pipe fittings or the like, comprising a socket end which is assigned to one pipe and into which a spigot end of the other pipe, which has a support strip, can be inserted and which has a radially inward-protruding edge with at least one ring segment-shaped recess, and a locking device for locking the spigot end in the socket end, in that the support strip rests against the locking device and said locking device rests against the edge, the locking device comprising at least two ring segment-shaped locking elements, wherein at least four recesses are provided and are arranged with uniform spacing in the circumferential direction, and the two locking elements each have two ring segment-shaped locking parts which are joined together via a respective web, the spacing between the two locking parts of a locking element corresponding to the spacing between two recesses,

• wherein a longitudinal end of the ring seal is embodied in a dovetailed manner and the opposing other longitudinal end has an outwardly extending collar, and in that the outer and inner surfaces, which connect the two longitudinal ends, are—in longitudinal section—embodied in a concave manner.