Cradle to Gate
Identity ID
6209c829-5eb9-4913-ba08-c382261e0c48
Materials
Associated ID
40ae7b5a-d0cc-4057-ab4f-5bf2f52f3a6c
Included activities starts
Included activities ends
Description
The product represented by this dataset is an optical fibre composite overhead ground wire (OPGW), namely a cable that combines lightning protection shielding and optical fibre communication functions, mainly composed of optical fibres, aluminium-clad steel wire, aluminium alloy wire, stainless steel tube, etc., manufactured through processes such as optical fibre colouring, stainless steel tube welding and stranding, with an average weight of about 10315 kg per kilometre. The key upstream raw materials of this product are optical fibres, ink, stainless steel strip, solder, welding rods, aluminium-clad steel wire and alloy aluminium wire, etc., and the downstream is mainly applied to lightning protection shielding and optical fibre communication of high-voltage and extra-high-voltage transmission lines. As for the system boundary, the packaging of the product and its post-delivery transport, use, scrapping, recycling and final disposal, as well as infrastructure such as the manufacture of production equipment and plant construction, are not included within the dataset boundary. In terms of data sources and data processing, the data inventory is formed by merging data from multiple sources.
Activity Description
The system boundary is the cradle-to-gate of OPGW (optical fiber composite overhead ground wire), with input of raw materials as the starting point and finished OPGW leaving the factory as the end point. The main stages include optical fiber coloring (optical fiber, ink, etc.), stainless steel pipe welding (stainless steel strip, solder, welding rod, etc.), and stranding (aluminum-clad steel wire, alloy aluminum wire, etc.).
Process Description
Overhead ground wires refer to wires that are directly connected to the earth on high-voltage and ultra-high-voltage lines. Their shielding of wires and coupling with wires can reduce the chance of lightning striking the wires directly. When lightning strikes a tower, the lightning current can be diverted through the overhead ground wire to reduce the potential at the top of the tower and improve the lightning resistance level. Overhead ground wires are divided into two types: steel-core aluminum stranded wires and fiber optic composite overhead ground wires; fiber optic composite overhead ground wires have both traditional overhead ground wire and communication functions. They are mainly composed of optical fibers, aluminum-clad steel wires, aluminum alloy wires, stainless steel tubes, etc., in the form of cables, and are widely used in lightning protection shielding and optical fiber communications for high-voltage and ultra-high-voltage transmission lines.
Time period
2023
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The production of optical fiber composite overhead ground wire mainly includes processes such as optical fiber coloring, stainless steel tube welding and stranding. The optical fiber that has passed the inspection is colored first; then the specifications of the stainless steel tube and the number of optical fibers in the tube are determined according to the production needs, and the stainless steel tube is welded. Fiber paste is added to the welded steel tube to improve the mechanical properties and waterproofness of the optical fiber; finally, the stainless steel tube optical unit is stranded with aluminum-clad steel wire or aluminum alloy wire, anti-corrosion paste is added during stranding, and the finished optical fiber composite overhead ground wire is formed after packaging.