Seal for a rotatable pipe coupling.

摘要

Seal for a rotatable pipe coupling of large dimensions such as the swivel of a mooring device, said seal comprising a sealing ring (30) of substantially rectangular cross-section (31) placed in a rectangular groove (29) which bridges the gap (27) to be sealed, said sealing ring (30) being placed in said groove (29) in a manner such that it can expand or contract by temperature variations inside the groove (29). This can be achieved by means of radial clearance (34) between the inner face of the ring (30) and the opposite wall (28) of the groove (29) and/or by clearance (35) between the ring (30) and the outer wall of the groove.