Polyurethane Submarine Cable (PUR Jacketed Power and Control)

Engineered for the most demanding marine and offshore environments, our polyurethane submarine cable provides a reliable power and control solution for equipment operating in continuous seawater, fresh water, and wastewater immersion. Designed for heavy-duty reeling and dragging applications, this cable combines superior mechanical strength with chemical resilience, making it the preferred choice for global EPC contractors and port automation engineers.

Key Performance Characteristics

Our PUR marine cable is constructed to overcome the primary failure points in dynamic subsea applications. Its performance is defined by five distinct engineering features:

• High-Flexibility & Tensile Strength: Incorporates finely stranded, bare oxygen-free copper conductors (Class 6) to ensure excellent electrical conductivity while maintaining critical flexibility and a tight bend radius for reeling systems.
• Abrasion & Torsion Resistance: A specialized stranding technique, optimized lay length, and an advanced internal compound combine to prevent core breakage under continuous flexing, bending, and twisting motion.
• Electromagnetic Interference (EMI) Protection: An optional tinned-copper braid shield with ≥85% coverage provides effective defense against external signal interference, ensuring data integrity in control applications.
• Load-Bearing & Safety: Designed with an integrated high-tensile galvanized steel strain relief element and jute fillers wrapped in a synthetic fiber buffer layer. This ensures a longer service life and operational safety under vertical hanging and constant drag forces (customizable without steel carrier).
• Environmental Resilience: A specialized polyurethane (PUR) outer jacket delivers unmatched resistance to oil, fuels, saltwater corrosion, hydrolysis, UV radiation, and mechanical tearing.

Typical Marine & Offshore Applications

This armored submarine power cable is purpose-built for installations requiring long-term reliability in harsh wet conditions:

• Port & Terminal Equipment: STS (ship-to-shore) cranes, RTG (rubber-tired gantry) cranes, and spreader reeling systems.
• Offshore & Shipboard Systems: Deck cranes, ROVs (remotely operated vehicles), winches, and umbilical cables.
• Marine Infrastructure: Locks, dams, floating docks, and wastewater treatment facilities.
• Offshore Energy: Drilling platforms and support vessels where mud, salt spray, and continuous flexing are critical design factors.

Detailed Technical Specifications

We prioritize transparency in specification to help procurement engineers validate compliance against IEC and other international standards.

• Conductor Material: Highly flexible, multi-stranded bare oxygen-free copper. Conforms to VDE 0295 Class 6 / IEC 60228 Class 6 configuration for maximum flex life.
• Insulation System: Specially formulated PVC insulation providing high dielectric strength and mechanical flexibility.
• Inner Jacket: Durable composite thermoplastic inner layer to protect the core assembly from external chafing.
• Shielding (Optional): Tinned copper braid, >85% optical coverage. Recommended for control and instrumentation signals near high-power switchgear.
• Outer Sheath Material: Premium Polyurethane (PUR). A non-toxic, halogen-free option is available upon request.
• Sheath Color: Standard stock includes RAL 7000 (Gray), RAL 9005 (Black), and RAL 2004 (Orange). Custom colors are available to meet project branding or safety coding requirements.
• Rated Voltage (U₀/U): 600/1000V
• Test Voltage (AC): 2500 V for 5 min.
• Temperature Range:
  • Fixed Installation: -40°C to +105°C
  • Flexing Application: -40°C to +105°C
• Minimum Bending Radius:
  • Fixed Installation: 5 x outer diameter (OD)
  • Dynamic Application: 8 x outer diameter (OD)

Custom-Capable Manufacturing

We are a specialist manufacturer, not a catalog house. We understand that offshore projects require non-standard solutions. In addition to standard submarine trailing cable, we offer:

• Custom AWG (American Wire Gauge) sizing for North American markets.
• Hybrid construction: combining power conductors, fiber optics, and shielded signal pairs in one jacket.
• Enhanced halogen-free, LSZH (Low Smoke Zero Halogen) outer sheaths for enclosed marine environments.

FAQ

We have structured this FAQ section to mirror the pre-purchase technical queries we receive from EPC contractors and procurement engineers evaluating long-term subsea installations.

Is the polyurethane cable suitable for permanent underwater submersion in saltwater?

Yes. This is the primary design criterion for our PUR submarine power cable. The cross-linked polyurethane outer jacket is specifically chosen for its hydrolysis resistance. Unlike standard rubber compounds, PUR does not swell or structurally degrade under prolonged saltwater or freshwater exposure. For dynamic applications involving continuous reeling under load, we reinforce the jacket with a high-tensile steel wire braid for incompressibility.

What does “flexible submarine cable” mean in a technical sense for this product?

Flexibility in our specification refers to VDE 0295 Class 6 conductor stranding, which uses a high quantity of extremely fine bare copper wires. This is combined with a pressure-extruded inner jacket and a short-lay-length core stranding designed to distribute torsional stress evenly across the cable cross-section. This prevents “corkscrewing” and conductor fatigue when the cable is continuously wound onto a motorized reel drum under heavy tension.

Can you supply it with an armored layer for burial or extreme abrasion?

The standard design includes either a high-tensile galvanized steel load-bearing element or a full steel wire braid armor (SWB). For submarine applications combined with anchoring or rock-dumping risk, we recommend a double-reverse galvanized steel wire armor layer. Please specify the installation environment in your RFQ so our engineers can confirm the optimal mechanical protection without compromising the minimum bending radius.

We are an OEM in the US. Do you offer alternative AWG sizes and jacket colors?

Absolutely. While we list 600/1000V as our standard rating, we manufacture to order based on your project’s electrical and dimensional constraints. We can engineer the cable with AWG conductors (e.g., 2 AWG, 4 AWG) and specific jacket colors (e.g., white for visibility, specific safety orange) to meet your OEM integration requirements. A dedicated datasheet is generated for every custom order batch.

We require IEC/IEEE compliance documentation. Do you provide test reports?

Yes. As a supplier to the global marine and offshore energy sector, we provide full material traceability and Factory Acceptance Test (FAT) documentation with every shipped order. Standard documentation includes the certificate of origin, tensile load test graphs, spark test reports, and 2500V high-voltage test verification for the 600/1000V class cable.