At present, almost all of the submarine cables produced by domestic cable manufacturers in my country seek third-party laying. Throughout the world, they can be self-produced and laid. The only cable companies in China are giants such as Prisman, Nexans, and LS. Submarine cable laying requires laying ships, submarine explorers, monitors, etc. Some companies have developed submarine cable laying robots for actual operation.

The research and development, production, and laying of submarine cables have a history of nearly 170 years. In 1850, the first submarine cable in human history was laid between Britain and France; China's first submarine cable was completed in 1888. There are two One is between Chuanshi Island in Fuzhou and Huwei in Taiwan, and the other is from Anping, Tainan to Penghu, both of which were laid by the then governor of Taiwan Liu Mingchuan. Submarine cables are classified into different types of insulation: impregnated paper-covered insulated cables, oil-filled cables, extruded cables (XLPE cross-linked polyethylene insulation and EPR ethylene-propylene rubber insulation), impregnated paper-covered insulation and oil-filled cables The gap limitation with laying has been basically eliminated.

Currently, the most widely used and most widely used are XLPE insulated cables. Submarine cables can be divided into alternating current (AC) transmission and direct current (DC) transmission according to the current transmission method. At present, some large foreign cable companies, such as Italy Prius, Japan Tengcang Cable, Japan Furukawa Co., Ltd., Japan Sumitomo Electric, Nexans of France, LS of South Korea, General Cable of the United States, etc., all have the ability to continuously produce ultra-high voltage, large cross-section DC submarine cables, and have submarine cable flexible joint technology, and can provide integrated installation and laying solutions.

my country’s submarine cables are only in their infancy. At present, domestic companies with submarine cable production capacity include: Hengtong, (new) Far East Cable Co., Ltd., Zhongtian Technology Cable Group, Ningbo Dongfang Cable Co., Ltd., Qingdao Han Cable Co., Ltd. The company, Shenyang Furukawa Cable Factory (Japan Furukawa actually holding), Shanghai Tengcang Cable Factory (Japan Tengcang Holdings), Baosheng Prisman Ultra High Voltage Cable Co., Ltd. (Baosheng Holdings) and other leading enterprises.

The laying of submarine cables is a huge and complex project, which mainly includes three stages: cable route survey and cleaning, submarine cable laying and flushing protection. At present, almost all of the submarine cables produced by domestic cable manufacturers in my country seek third-party laying. Looking at the world, the only cable companies that can produce and lay by themselves are giants such as Prisman, Nexans, and LS. Submarine cable laying requires laying ships, submarine explorers, monitors, etc. Some companies have developed submarine cable laying robots for actual operation.