Abstract: A sealing gasket to be clamped in particular between pipe-coupling flanges comprises a sealing packing of expanded graphite placed between an inner reinforcement ring and an outer reinforcement ring, the two rings being placed at different levels prior to clamping. The graphite packing is applied against bearing surfaces formed and oriented on the reinforcement rings so that, at the time of clamping of the gasket, the resultants of the forces transmitted to the bearing surfaces are in the same direction and of opposite sense, thus inducing a compression of the sealing packing.

Abstract: A sealing ring made up of nestable elements is constructed by forming a basic cylindrical-frustoconical element having the function of withdstanding the height variations which are liable to be produced by a force exerted on the sealing ring in its axis of revolution. At least one of the nestable elements is formed of expanded graphite and compressed with a constant ratio. The elements are then fitted within each other until a sealing ring of predetermined height is obtained.

Abstract: This invention relates to a device for the sealed connection of two pipe elements, wherein it comprises in projection on the pipe elements two members capable of being moved towards each other by at least one clamping means and of which the contiguous faces defined opposite grooves for housing a crushable seal comprising an inner toric ring of which the convexity is directed outwardly and an outer toric ring of which the convexity is directed inwardly. According to the invention, the seal is constituted solely by such rings, which abut on each other opposite the annular crests of their convex parts and the circular groove of each connecting member presents convergent bearing surfaces pressing the edges of said rings.