Patent ID: 7067080

Claim:
A process for the production of composite tubing from a structure of mineral or organic fibers, natural or artificial, in which said structure of fibers is impregnated with a suitable resin and after shaping in or on a mold, the temperature is raised for polymerization of said resin, a sealing of a wall of the tubing being carried out in the course of this process, wherein, there is used a fiber structure constituted by a single ply ( 2 , 24 ) of a unit weight of at least about 400 g/m 2 , said single ply ( 2 , 24 ) is impregnated with said resin at an impregnation quantity of at least 40%, then there is placed on one of the surfaces of said single ply ( 2 , 24 ) a coating ( 6 , 26 ) of a sealing agent, said polymerization being carried out while said single ply ( 2 , 24 ) and its coating ( 6 , 26 ) are in the desired shape in or on said mold ( 20 a , 20 b ).