Rohrverbindungen

A metal fitting (11) for an end of a plain length of pipe (12) comprises a body (13) with flange means (14) adjacent a first end (15), a gland ring (16) adjacent the other end (17) of the body, a grip ring (18) between the body (13) and the gland ring (16), and screw fasteners (19) for urging the gland ring (16) towards the flange means (14); characterised in that:- the body (13) has an integral outer tubular spigot (20) projecting towards the gland ring (16) and a co-axial integral inner tubular spigot (21) having a cylindrical outer surface (22) projecting beyond the free end (23) of the outer tubular spigot (20), the inside (24) of the outer spigot (20) being provided with a frustoconical portion (25) adjacent and converging from that free end; the gland ring (16) has its inside provided with a similar frustoconical portion (26) converging in the opposite direction; and the grip ring (18) is a split ring having external surfaces (27, 28) mating with the frustoconical portions in the body (13) and the gland ring (16), and internal circumferentially disposed ribs (29) initially spaced radially from the cylindrical outer surface (22) of the inner spigot (21) by no less than the thickness (T) of a plain length of pipe (12) on one end of which the metal fitting (11) is intended to be fitted.