Patent ID: 7987875

Claim:
A flexible armoured pipe having a center axis and comprising an inner liner surrounded by at least two armouring layers comprising a radial armouring composed by wound armouring profiles, and an axial armouring, the radial and axial armouring each comprising at least one armouring layer of armouring profiles wound with winding angles α i relative to the center axis, the at least two armouring layers defining an innermost and an outermost armouring layer relative to the liner wherein the winding angle of the innermost armouring layer α innermost is larger than the winding angle of the outermost armouring layer α outermost , wherein said outermost armouring layer constitutes or is part of an outer group of layers constituting said axial armouring and providing protection against axial deformations of the flexible pipe, and wherein the winding angle α outermost of the armouring layer(s) of the outer group of layers is/are in the range from 25° to 65°, the pipe further comprising at least one fibrous layer surrounding the outermost armouring layer wherein the fibrous layer is made of a material with a stiffness which is 60% or lower than the stiffness of the wound armouring profiles of the radial armouring, and comprises at least two fibrous cords wound on an underlying layer, wherein the winding angle α fibrous of the at least two fibrous cords is larger than 70°, and wherein some of the layers of the flexible pipe are un-bonded.