Method and device for fireproofing a part in composite material

1. A method to fireproof a section of a structural part made of composite material using a device comprising:

a skin comprising an outer surface configured to face a flame and an inner surface, the skin is made of composite material that comprises fibrous reinforcement in a polymer matrix comprising a ply made of glass fabric on the inner surface of the skin and comprises a fastener to fasten the skin to the structural part; and

a layer of needled fire retardant felt placed between the inner surface of the skin and a surface of the structural part:

the method comprising the steps of:

(i) laying up a ply of non-impregnated glass on a tool corresponding to a shape of a section of the structural part, offset by a thickness of the fire retardant felt, wherein the ply of non-impregnated glass forms the inner surface of the skin;

(ii) laying up a ply of pre-impregnated glass on the ply of non-impregnated glass to form a laminate;

(iii) curing the laminate so as to form the skin;

(iv) placing a thickness of fire retardant felt on the inner surface of the skin;

(v) fixing the skin to a corresponding section of the structural part; and

repeating steps (i) to (v) for each section of the structural part until the structural part is covered.

2. The method according to claim 1 , wherein step (v) of fixing the skin comprises a riveting operation which comprise applying thermal protection of an ablative or intumescent type on rivet heads.

3. The method according to claim 1 , wherein the fire retardant felt is 10 mm thick.