Abstract: Device for injecting a liquid into a tube and steam generator incorporating this device.The cannula has a divergent portion, means located on the bottom part of the cannula for centering the same and immobilizing it in translation relative to the tube, together with a sleeve surrounding the cannula. The means for centering and immobilizing the cannula in translation on the tube are constituted by a centering part, at least one slot and an inner cone formed in the sleeve, an outer cone formed on the bottom part of the cannula, said cones cooperating with one another, means being provided for elastically applying the outer cone to the inner cone.

Abstract: Steam generator, particularly for a pressurized water nuclear reactor, which has in per se known manner a water box in which circulates the hot water from the reactor core, and then enters a series of heat exchange tubes installed in a tube plate and extending within a secondary ferrule traversed by the secondary water, wherein the water box, secondary ferrule and tube plate are three independent, disassemblable assemblies.

Abstract: Joining means between two pipes, each provided with a collar having a given external diameter and able to compress a gasket between these two collars, said means having two flanges with aligned holes and an internal diameter smaller than the external diameter of the collars and tightening means traversing said holes making it possible to move the flanges together, whereby at least one of the flanges comprises an external cylindrical ring with an internal diameter larger than the external diameter of the collars and bearing parts disposed within said ring and in which are formed said holes, articulated on one lateral face of the ring, so as to be able to tilt into an overriding position in which the internal diameter of the flange substantially corresponds to the internal diameter of the ring.