What material are fireproof partitions for cable trays made of

Fireproof partitions for cable trays are typically made from fireproof boards, high-density calcium silicate boards, fireproof coatings, fireproof cloth, fireproof mud, and light fire-blocking sections.Common Materials

1. Fireproof Boards: These include high-density calcium silicate boards, which are non-combustible, provide excellent thermal insulation, and maintain structural stability under high temperatures. They can be used to construct box structures or encapsulate existing cable trays, offering fire protection for 1–3 hours while preventing heat transfer to cables and maintaining mechanical integrity . 2. Fireproof Coatings and Tapes: Products like FLAMMOTECT-A and DG-CR 0.7 form protective layers around cables, delaying fire spread and enhancing resistance to environmental factors such as UV, moisture, and chemicals . 3. Fireproof Bags and Mud: These materials are applied around cables or tray openings to block flames and provide insulation. They are convenient and low-cost but may require regular maintenance and have limited long-term durability . 4. Light Fire-Blocking Sections: Made from expanded flame-retardant materials, fireproof cloth, and metal components, these sections are lightweight, easy to install, and provide excellent fireproof performance. They also allow for easier cable addition or replacement without repeated disassembly .

Performance and Standards

Fireproof partitions must comply with national standards such as GB23864, ensuring a minimum fire resistance of 1 hour, with some products rated up to 2–3 hours. They should maintain stability under high temperatures, resist deformation, and effectively isolate fire sources to protect both cables and personnel .

Advantages and Considerations

• Fireproof boards and high-density calcium silicate boards: High strength, excellent fire resistance, and long service life, but heavier and may occupy more space.
• Fireproof coatings and tapes: Easy to apply, flexible, and suitable for retrofitting, but may require periodic inspection.
• Light fire-blocking sections: Lightweight, easy to install, and maintainable, ideal for power industry cable trays, though less common in general applications.
• Fireproof mud and bags: Cost-effective and simple to use, but less durable and may need frequent maintenance . Selecting the appropriate material depends on the installation environment, required fire resistance, ease of maintenance, and compliance with safety standards. Proper installation ensures effective fire isolation and protection of critical cable systems.