A method of manufacturing a power cable, including: a) providing a conductor, b) providing an insulation system including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, c) providing an elastic mechanical support layer around the outer semiconducting layer, d) compressing the mechanical support layer radially by means of a compression element, e) welding opposing edges of a metallic sheet arranged radially outside of the mechanical support layer longitudinally to form a metallic water blocking layer radially spaced apart from the mechanical support layer in the radially compressed state, and f) expanding the mechanical support layer by releasing the compression element from compressing the mechanical support layer, causing the mechanical support layer to support the metallic water blocking layer.

A method of manufacturing a power cable, including: a) providing a conductor, b) providing an insulation system including an inner semiconducting layer arranged around the conductor, an insulation layer arranged around the inner semiconducting layer, and an outer semiconducting layer arranged around the insulation layer, c) providing an elastic mechanical support layer around the outer semiconducting layer, d) compressing the mechanical support layer radially by means of a compression element, e) welding opposing edges of a metallic sheet arranged radially outside of the mechanical support layer longitudinally to form a metallic water blocking layer radially spaced apart from the mechanical support layer in the radially compressed state, and f) expanding the mechanical support layer by releasing the compression element from compressing the mechanical support layer, causing the mechanical support layer to support the metallic water blocking layer.

An electric power transmission cable comprises electric power conductors and a plurality of parallel spiralled armouring wires. The electric power transmission cable comprises along its length a first section (I), a second section (III) and a transition section (II). The transition section (II) is provided between the first section (I) and the second section (III). The plurality of parallel spiralled armouring wires in the first section (I) comprises or consists out of first armouring wires (121). The first armouring wires (121) are carbon steel wires comprising a metallic corrosion resistant coating. At least part of the plurality of parallel spiralling armouring wires in the second section (III) comprise austenitic steel wires (123). In the transition section (II), ends of first armouring wires (121) are individually welded to ends of austenitic steel wires (123) of the second section (III). The transition section (II) starts at the first weld (137) between a first armouring wire (121) and an austenitic steel wire (123). The transition section (II) ends at the last weld (130) between a first armouring wire (121) and an austenitic steel wire (123). The transition section (II) is at least 10 meter long.

An electric power transmission cable comprises electric power conductors and a plurality of parallel spiralled armouring wires. The electric power transmission cable comprises along its length a first section (I), a second section (III) and a transition section (II). The transition section (II) is provided between the first section (I) and the second section (III). The plurality of parallel spiralled armouring wires in the first section (I) comprises or consists out of first armouring wires (121). The first armouring wires (121) are carbon steel wires comprising a metallic corrosion resistant coating. At least part of the plurality of parallel spiralling armouring wires in the second section (III) comprise austenitic steel wires (123). In the transition section (II), ends of first armouring wires (121) are individually welded to ends of austenitic steel wires (123) of the second section (III). The transition section (II) starts at the first weld (137) between a first armouring wire (121) and an austenitic steel wire (123). The transition section (II) ends at the last weld (130) between a first armouring wire (121) and an austenitic steel wire (123). The transition section (II) is at least 10 meter long.

A power cable includes a conductor, an inner semi-conductive layer covering the conductor, an insulating layer covering the inner semi-conductive layer and impregnated with insulating oil, an outer semi-conductive layer covering the insulating layer, a metal sheath layer covering the outer semi-conductive layer, and a cable protection layer covering the metal sheath layer. A minimum thickness t1 of a certain cross section of the metal sheath layer is less than or equal to 90% of a maximum thickness t2 thereof.

A power cable includes a conductor, an inner semi-conductive layer covering the conductor, an insulating layer covering the inner semi-conductive layer and impregnated with insulating oil, an outer semi-conductive layer covering the insulating layer, a metal sheath layer covering the outer semi-conductive layer, and a cable protection layer covering the metal sheath layer. A minimum thickness t1 of a certain cross section of the metal sheath layer is less than or equal to 90% of a maximum thickness t2 thereof.

An armoured power cable is disclosed. The cable includes: at least one core comprising an electric conductor; and an armour surrounding the core, wherein the amour comprises at least one layer made of a metallic material having a tensile strength of at least 400 MPa and showing a weight loss from 0.01% to 0.1% after 30 days of exposure to a corrosive solution according to ASTM G3172 (2004). The cable has mechanical properties suitable for its handling and installation, for example, underwater, and its armour can be at least partially degraded over time after installation due to corrosion exerted by corrosive agents present in the installation environment, without impairing the mechanical properties of the other cable portions and without impairing its electric performance.

The present disclosure relates to an armoured AC cable comprising at least one core comprising an electric conductor, and an armour surrounding the at least one core and comprising ferromagnetic wires, wherein the ferromagnetic wires are permanently magnetized with a remanent magnetic field which is uniform or variable along the cable length L. The present disclosure also relates to a process for producing an armoured AC cable, a method for improving the performances of an armoured AC cable, and a method for reducing losses in an armoured AC cable.

The present disclosure relates to an armoured AC cable comprising at least one core comprising an electric conductor, and an armour surrounding the at least one core and comprising ferromagnetic wires, wherein the ferromagnetic wires are permanently magnetized with a remanent magnetic field which is uniform or variable along the cable length L. The present disclosure also relates to a process for producing an armoured AC cable, a method for improving the performances of an armoured AC cable, and a method for reducing losses in an armoured AC cable.

While laying a subsea cable, an exposed cut off end of the cable is exposed to water prior to permanently sealing off this cable end. To prevent damage to the cable due to contact with the often salt water, due to for example oxidation, a temporarily watertight seal is to be applied to the cut off end. A method for applying this seal is provided which comprises applying a mouldable sealant to the exposed end wherein the sealant acts as a watertight barrier between the water and the cut off end of the cable. The sealant may comprise an intermediate layer between the cut off end and a watertight outer layer arranged to increase adhesion between the cut off end and the outer layer. This allows a broader range of outer layer materials to be used as the outer layer material does not need to adhere directly with the cable.