Published: 2026-08-02
Shanghai Suoqi Cable Co., Ltd. is deeply engaged in the field of special flexible cables. The following provides a professional interpretation of seawater-resistant cables from three dimensions: material structure, performance advantages, and application scenarios.
Product original reference: Special cable with seawater-resistant, corrosion-resistant weak acid and alkali sheath
1. Materials and Structural Parameters
Characteristics of Sea-resistant Cables: They are used in important situations such as between distant islands and across-sea facilities. The laying distance of submarine power cables is much shorter compared to communication cables, mainly used between mainland and islands, across rivers or bays, connecting from the mainland to drilling platforms, or for interconnections between drilling platforms. In general, using submarine cables to transmit power is undoubtedly more expensive than overhead cables of the same length, but it is often more economical than using small, isolated power plants for regional power generation, and its benefits are greater in offshore areas. This type of cable is widely used in places with many islands and rivers.
Suoqi Cable (Shanghai) Co., Ltd. specializes in designing and customizing electrical wires and cables for mechanical equipment used for extension/retraction and towing in deep water. Various specifications of underwater robot cables can be customized according to customer requirements, such as for signal transmission, power supply, and equipment control systems.
When ordering, please specify the usage environment: such as tensile load, whether it is used for mobile or fixed installation, underwater environment (freshwater or seawater) depth, etc. Underwater cables can be divided into: ① video cable; ② signal cable; ③ control cable; ④ power cable; ⑤ composite cable. Applications of underwater cables: Underwater ROV unmanned remotely operated vehicles - underwater filming, underwater salvage, underwater construction, etc. Equipped with underwater robotic arms, hydraulic cutters, and other working tools. The underwater environment is harsh and dangerous, and human diving depth is limited. Underwater robots have become an important tool for ocean development, and in such environments, ordinary cables are no longer suitable for operation, hence the emergence of underwater robot cables (special cables).
Suoqi Cable (Shanghai) Co., Ltd. specializes in designing and customizing electrical wires and cables for mechanical equipment used for extension/retraction and towing in deep water. Various specifications of underwater robot cables can be customized according to customer requirements, such as for signal transmission, power supply, and equipment control systems.
Underwater operation robot cables Seawater protection cables Usage characteristics Underwater operation robot cables Seawater protection cables Usage characteristics Submarine cables are divided into submarine communication cables and submarine power cables. Submarine communication cables are mainly used for communication services, are expensive, but have a high degree of confidentiality. Submarine power cables are mainly used for underwater transmission of high-power electrical energy, serving the same function as underground power cables, but differ in application scenarios and laying methods. Because submarine cable engineering is recognized worldwide as a complex and difficult large-scale project, requiring complex technologies from environmental detection, marine physical surveys, to cable design, manufacturing, and installation, there are only a few manufacturers of submarine cables, mainly Norway, Denmark, Japan, Canada, the United States, the United Kingdom, France, Italy, and others. These countries also provide laying technology in addition to manufacturing.
Underwater cable structure: conductor core: multiple strands finely stranded into bundles of fine-grade oxygen-free copper wire / anti-corrosion tinned copper wire Conductor structure: anti-twist layered structure; Grouped gap filling; Twisted pair structure followed by layered bundle Insulation: Waterproof mixed raw materials made from PVC / corrosion-resistant Teflon plastic Color: black number, white number number or color core color identification Tensile structure: polyester yarn fiber / high-strength anti-Lakevlar bulletproof wire / finely stranded steel wire Winding material: makes the wire more rounded and firm, can be added with raw tape (PTFE) or high-quality nonwoven fabric (high cost-effectiveness) Shielding: aluminum foil shielding / copper mesh braided / tin-plated copper mesh braided shielding Inner sheath: modified low-viscosity strong extrusion inner sheath customizable (optional for environmental requirements) Outer sheath: seawater-resistant special material (waterproof, acid and alkali resistant, radiation resistant, corrosion resistant, antimicrobial protection) Southeast Asian markets such as Japan, South Korea, the Philippines, Malaysia, Indonesia, Vietnam, Thailand, etc., do not yet have submarine cable production capacity. Many local regional submarine cable projects import optoelectronic composite submarine cables from Western Europe, which is very costly. Relatively speaking, Chinese submarine cable manufacturers have advantages in both cost and geographic advantage.
Underwater cable structure: conductor core: multi-strand fine-stranded oxygen-free copper wire / anti-corrosion tinned copper wire; conductor structure: anti-twist layered structure; grouped gap filling; twisted pair structure with layered bundled cable features: 1. High flexibility - high toughness - bending resistance - twisting resistance (prevents internal core breakage during frequent bending) 2. Abrasion resistance - notch resistance - high pressure resistance (outer sheath stabilizes against external force damage) 3. Electronic interference resistance - integrated braiding high shielding density and special structural design effectively resist external and internal cable interference, ensuring signal transmission stability 4. Tensile strength - underwater impact resistance - high-strength Kevlar tensile fiber serves as the cable's tensile center or tensile braiding, forming the cable round to evenly bear tensile forces, ensuring long-term effective operation without cracking. (When working underwater, cables can withstand the tensile forces of connected equipment or heavy objects, with a maximum breaking force of over 1 ton. In special cases, tensile steel wire can be added.) 5. Seawater Resistance—Extremely Strong Weather Resistance—Effective for underwater operation (cold resistance, oxidation resistance, antimicrobial resistance, radiation protection, corrosion resistance, ozone resistance, acid and alkali salt spray corrosion resistance). 6. Sheath—Made with imported TPU special materials mixed with special materials—Effectively designed for seawater and other harsh environments.
7. Easy to distinguish—core insulation color, sheath color, and cable length can be customized according to customer requirements
2. Performance Technical Indicators
Rated voltage 0.6/1 kV; longitudinal watertight performance can reach a water depth of 300 m; applicable temperature range -20℃ to 80℃; salt spray resistance test not less than 1000 h, excellent hydrolysis resistance, can be used stably in marine environments for a long time.
3. Application Scenarios
Seawater protection cables are widely used in industrial automation, lifting and transportation, ports and docks, and other fields.
About Shanghai Suoqi
Shanghai Suoqi Electric Wire & Cable Co., Ltd. is a specialized cable enterprise focusing on the research and development, design, production, and sales of special flexible cables. The company's products cover a series including reel cables, flat cables, drag chain cables, encoder cables, polyurethane cables, seawater-resistant cables, seawater-resistant network cables, and high-altitude vehicle cables, which are widely used in ports machinery, mining, industrial automation, marine engineering, and other fields. For more product information or inquiries, please call 13311756197 (same number on WeChat).