Method for fixing a tube to a connector, and connecting kit

1. A connection kit comprising a sleeve and a coupling for connecting together at least one pair of tubes, wherein

the coupling is generally tubular in shape, presenting an axis, together with first and second orifices for fastening the two tubes;

the first orifice is provided at a first end of the coupling and is oriented on its axis;

said first end is configured to enable one tube of said pair of tubes to be fastened in leaktight manner to the first orifice of the coupling;

the coupling is suitable for sliding coaxially relative to the sleeve, from a first position in which the first end of the coupling projects outside a first end of the sleeve;

to a second position that enables the sleeve to be fastened to the coupling at a distance from said first orifice, said distance being greater than a diameter of an internal passage of the coupling.

2. A kit according to claim 1 , wherein the sleeve-includes a base having a fastener flange for fastening the sleeve to a support.

3. A kit according to claim 2 , wherein the base partially closes the first end of the sleeve.

4. A kit according to claim 2 , wherein the base is substantially plane and oriented transversely relative to an axis of the sleeve.

5. A kit according to claim 2 , wherein a hole provided in the base for passing a tube presents a diameter that is slightly greater than the diameter of the internal passage of the coupling.

6. A kit according to claim 2 , wherein, when the coupling is placed in the second position, the fastener flange is in the vicinity of the first end of the sleeve.

7. A kit according to claim 1 , wherein the sleeve presents a second end at a side opposite from the first end and

among the two ends of the sleeve, only the second end enables the coupling to be inserted into the sleeve in order to be positioned in the first position.

8. A kit according to claim 1 , wherein, relative to an axis of the coupling, when the coupling is placed in the second position, the first end of the coupling is inside the sleeve.

9. A kit according to claim 1 , wherein the second orifice of the coupling is situated at a second end of the coupling, and is configured to enable a tube of said pair of tubes to be fastened in leaktight manner to the second orifice of the coupling.

10. A fastening method for fastening a tube to a connector, the method comprising the following steps:

a) providing a connection kit according to claim 1 ;

b) placing the coupling in a first position in which the first end of the coupling projects outside the sleeve through a first end thereof;

c) then fastening the first tube in leaktight manner to the first orifice of the coupling;

d) moving the coupling relative to the sleeve into a second position in which the first orifice preferably lies inside the sleeve; and

e) with the coupling in the second position, fastening the sleeve to the coupling at a distance from said first orifice, said distance being greater than a diameter of an internal passage of the coupling, the sleeve and the coupling together constituting a connector.

11. A fastening method according to claim 10 , wherein, in step c), the end of the first tube is welded to the coupling.

12. A fastening method according to claim 10 , wherein, in step b), the coupling is inserted into the sleeve via a second end of the sleeve situated at a side opposite from its first end, and is then placed in said first position.

13. A fastening method according to claim 10 , further including a step f) in which the sleeve is fastened to a support.

14. A fastening method according to claim 10 , wherein, in step c), the end of the first tube is welded to the coupling by orbital welding.