CPC F16L 17/032 (2013.01) [F16L 25/14 (2013.01)] | 10 Claims |
1. A coupling assembly comprising a socket and an interchangeable ring mounted in a free end of the socket,
wherein the interchangeable ring comprises a ring body extending axially between a first, inner face and a second, outer face on the free end of the socket,
wherein the ring comprises an external seal on the ring body provided in compression in the socket, between the ring and the socket, and
the ring comprises an internal seal for sealing between the ring and a pipe to be inserted, the internal seal having a lip which extends between an anchoring end on the second outer face and a free end,
wherein the external seal is a circumferential seal with a single or multi-lobed seal profile, between the inner face and means for fastening the ring in the socket, wherein a circumferential radial seal housing is provided between the inner face and the means for fastening the ring in the socket, and wherein the circumferential radial seal housing is against an intermediate stop of the ring body.
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