Coupling to be crimped onto at least one pipe, set of pipes including such a coupling, and method for assembling a pipe with such a coupling

A coupling configured to be fluidically coupled to at least one pipe in a cryogenic air separation unit, the coupling comprising:

• at least one coupling member having a tubular overall shape and offering a receptacle to accept the pipe, the said coupling member comprising at least one rib of annular overall shape;
• at least one crimping ring arranged on said at least one coupling member in such a way as to be moved between an introduction position, in which the pipe can be introduced into said at least one receptacle, and a crimping position, in which the crimping ring immobilizes the pipe with respect to a respective coupling member following deformation of said at least one rib;
• and
• at least one exhaust orifice configured to fluidically connect said at least one cavity to the outside of the coupling,
• wherein the receptacle and the at least one rib are configured to allow the formation of the at least one cavity between the coupling member and the pipe in the crimping position following deformation of said at least one rib during use.