Abstract: A reinforced flexible duct, particularly for transporting pressurized fluid having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to an axis of the duct and the traction resistant reinforcement comprises at least a pair of crossed layers wound at an angle of at most equal to 55.degree.. A ratio of stiffness traction resisting reinforcement to a stiffness of internal pressure resisting reinforcement is between 2.5 and 8 with a winding angle of the pair of cross layers of the traction resisting reinforcement having a value of between 20.degree. and 50.degree.. A ratio K.sub.t /K.sub.p of stiffness and the winding angle .alpha.

Abstract: A reinforced flexible duct, particularly for transporting pressurized fluids having an internal pressure reinforcement and a traction resisting reinforcement. The internal pressure reinforcement is wound at a high angle with respect to the axis of the duct and the traction resisting reinforcement comprises at least one pair of crossed layers wound at an angle at most equal to 55.degree.. The modulus of elasticity of the material for the internal pressure resisting reinforcement is smaller than the modulus of elasticity of the material for the traction resisting reinforcement.