End-piece of a flexible pipe for transporting fluid, associated flexible pipe and method

A method of assembly of an end-fitting of a flexible pipe, comprising:

• providing an end region of a polymer sheath of the flexible pipe and end sections of armor elements of the flexible pipe arranged around or in the end region of the polymer sheath;
• fitting an end vault defining a central bore for the letting the fluid flow along a central axis, and a cover defining, along with the end vault, a chamber for receiving the end sections of armor elements;
• assembling at least one sealing assembly comprising at least one crimping ring, the crimping ring comprising at least one bulge inserted radially into the polymer sheath;
• placing an annular seal in contact with the polymer sheath away from the crimping ring;
• the annular seal including a central annular region deformable radially toward the polymer sheath, and two stiffened annular peripheral regions located axially on opposite sides of the central region, the method comprising moving the peripheral annular regions toward each other to activate a radial deformation of the central region toward the polymer sheath from a rest configuration to an active sealing configuration around the polymer sheath.