A wired pipe system includes a wired pipe segment having a first end and a second end and a first coupler in the first end and a second coupler in the second end. The system also includes a transmission line disposed in the wired pipe segment between the first and second ends. The transmission line includes an inner conductor, an insulating material surrounding the inner conductor, an outer conductor surrounding the insulating material and the inner conductor for at least a portion of a length of the transmission line, the outer conductor being formed by deforming around the inner conductor a sheet of material into a substantially tubular member.

A method of manufacturing a submarine power cable, including: a) providing an insulation system around a conductor, the 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, b) arranging a metal sheath around the insulation system, and c) welding opposing edges of the metal sheath longitudinally by autogenous welding to form a metallic water-blocking layer around the insulation system, wherein the metal sheath consists of a copper material comprising at least 99 wt. % copper and at most 0.1 wt. % oxygen, or wherein the metal sheath consists of a stainless steel which has a chromium equivalent in a range of 16-25 and a nickel equivalent in a range of 11-22 according to a Schaeffler-DeLong constitutional diagram for which the chromium equivalent is calculated according to the formula % Cr+% Mo+1.5?% Si+0.5?% Nb and the nickel equivalent is calculated according to the formula % Ni+0.5?% Mn+30?(% C+% N).

A method of manufacturing a dynamic power cable (1) includes providing a cable core (2) made of an electrical conductor (3) and an electrically insulating layer (4) arranged radially outside of the electrical conductor (3). A metallic sheet (7) is wrapped radially around the cable core (2) the metallic sheet (7) having a copper-nickel alloy. Opposing edges of the metallic sheet (7) are welded together to form a continuous water barrier layer (5) around the cable core (2). The welding (8) is performed by autogenous welding.

Bundled cables and methods for preparing bundled cable are disclosed herein. In the method, a plurality of subunits is wound about a central member. The subunits include a subunit jacket made of a first thermoplastic composition and has a first outer surface, and the central member includes a central member jacket made of a second thermoplastic composition and has a second outer surface. A metal element is provided at an interface of the second outer surface and the first outer surface of the subunits. The metal element is heated such that at least one of the first thermoplastic composition or the second thermoplastic composition forms bonds with the other of the first thermoplastic composition or the second thermoplastic composition.

A floating photovoltaic cable manufacturing device for offshore photovoltaic systems and a manufacturing method thereof are provided. The device includes a cable body that passes through a rack at a constant speed, a winding frame is provided on one side of the rack, the winding frame is connected to a driving motor through a transmission mechanism, a rotation of the winding frame drives armored steel sheets to be wound on a surface of the cable body; a spot-welding gun provided in the rack through a regulation mechanism, a bottom of the spot-welding gun is aligned with the armored steel sheets; and a resistance band sleeved on surfaces of two sets of driving shafts, the resistance band is attached to the armored steel sheets, and a movement of the cable body enables the driving shafts to rotate on two sides of a connection rack.