LEINUOER Innovative Breakthrough: Introduction of Low-Smoke Zero-Halogen Plastic-Coated Flexible Metal Conduits Complying with Nuclear Power Plant Standard 5306 and National Standard GB/T 3641-1983

LEINUOER, a leading domestic supplier of industrial automation wiring harness protection solutions, has successfully developed and launched a new generation of low-smoke zero-halogen flexible metal conduits conforming to Standard 5306 for nuclear power plant environments. By deeply integrating stringent nuclear industry specifications with the reliable structural principles of the National Standard GB/T 3641-1983 in its design, materials, and manufacturing processes, this product marks a significant breakthrough for LEINUOER in the field of safety protection materials for the nuclear power sector.

Inheriting Excellence, Surpassing Standards
Since its promulgation, the GB/T 3641-1983 standard has, with its authoritative definitions regarding structural strength, flexibility, pressure resistance, and general protective performance of low-smoke zero-halogen plastic-coated flexible metal conduits, laid a solid foundation for decades in LEINUOER's fields of electrical installation and mechanical equipment protection. LEINUOER possesses a profound understanding of the reliability design essence embedded within this standard.

While inheriting the classic requirements of the GB/T 3641-1983 standard concerning basic conduit structure, thread forming process, dimensional series, and core mechanical performance (such as axial tensile strength, radial compression resistance), LEINUOER has achieved comprehensive material and functional upgrades to meet the safety demands of modern nuclear power plants under extreme conditions.

Core Features Tailored for Nuclear Safety Environments

• Outstanding Fire Safety Performance:

• Low-Smoke Zero-Halogen Material Sheath: Completely abandoning traditional materials, a special low-smoke zero-halogen composite layer is adopted. Under high temperatures or open flame, this material virtually releases no toxic halogenated gases and exhibits extremely low smoke density. This maximizes the preservation of personnel escape visibility and respiratory safety during accident scenarios while reducing corrosive damage to precision electrical equipment.

• Compliance with Nuclear Power Plant 5306 Series Standards: The product strictly adheres to specialized safety standards within the nuclear industry for cable laying and protection, meeting nuclear power plant safety requirements in indicators such as flame retardancy, heat release, and smoke toxicity.

• Environmental Endurance:

• Radiation Aging Resistance: The outer layer material and internal structure of the conduit undergo special treatment, enabling resistance to radiation environments in specific areas of nuclear power plants. This prevents material embrittlement and degradation due to irradiation, ensuring functional integrity.

• Corrosion Resistance and Sealing Performance: Building upon the rust prevention concept of the galvanized layer in GB/T 3641, innovative surface treatment technologies are employed, and interface designs are optimized. This significantly enhances corrosion resistance and dust/water ingress protection ratings in complex nuclear power environments characterized by humidity and chemical aerosols.

• Reliable Mechanical Protection and Electrical Performance:

• Upholding the flexibility and anti-twist fatigue characteristics inherent to low-smoke zero-halogen flexible metal conduits, facilitating installation in the spatially complex layouts of nuclear power plants.

• Maintaining excellent electromagnetic shielding effectiveness, providing reliable protection for sensitive control and measurement cables within nuclear power plants and preventing interference.

  
  

  
  

  
  

Application Prospects and Industry Significance
This low-smoke zero-halogen plastic-coated flexible metal conduit is primarily designed for the flexible connection and protection of instrumentation control circuits, emergency power supply circuits, fire alarm system circuits, and critical power circuits in key areas of nuclear power plants, such as inside and outside containment structures, electrical buildings, and cable passages.

The successful launch of this new product not only consolidates LEINUOER leadership position in the field of special cable protection conduits but also provides a new high-quality option for the localization and safety enhancement of China's nuclear power equipment.