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Pultrusion process cable trays

Fiber and communications infrastructure knowledge brief Published 16 Oct 2024

Prepared for preliminary research by the ROGER FIBRE knowledge desk. Confirm optical interfaces, port or core capacity, electrical input and output, enclosure protection, thermal design and installation limits against current standards and product documentation.

Pultruded FRP cable trays are manufactured by continuously pulling resin-impregnated fiberglass through a heated die to create strong, lightweight, corrosion-resistant profiles suitable for harsh environments.

Overview of Pultrusion

Pultrusion is a continuous, automated manufacturing process used to produce fiber-reinforced polymer (FRP) profiles with consistent cross-sections. In this process, fiberglass rovings and mats are impregnated with resin (commonly polyester, vinyl ester, epoxy, or phenolic) and pulled through a heated die, where the resin cures to form a solid, rigid profile. The continuous profile is then cut to desired lengths and undergoes quality control to ensure structural integrity and compliance with standards such as ASTM D3917 and ISO 9001.

Materials and Resin Selection

Polyester Resin: Cost-effective and widely used for general applications; can include UV-resistant additives. Vinyl Ester Resin: Offers superior chemical and heat resistance, ideal for corrosive environments. Epoxy Resin: Provides excellent electrical insulation, suitable for power and telecom projects.

Phenolic Resin: Notable for low smoke and toxicity, often used in fire-sensitive areas. A surface veil is often applied during pultrusion to ensure a resin-rich surface and UV resistance, enhancing durability in outdoor or offshore applications. Types of Pultruded Cable TraysLadder-Type: Features rungs for supporting cables, suitable for heavy loads and long spans.

Channel-

Type: Solid or ventilated bottom, ideal for protecting sensitive instrumentation and control cables. Perforated Trays: Allow ventilation and drainage, commonly used for light loads and instrumentation cables.

Advantages of Pultruded FRP Cable Trays

Lightweight and Easy to Install: Reduces labor and shipping costs. High Load Capacity: Supports substantial cable weights while maintaining structural integrity. Corrosion Resistance: Ideal for offshore platforms, chemical plants, water treatment facilities, and coastal environments.

Electrically Non-

Conductive: Enhances safety in electrical installations.

U

V Stability: Maintains appearance and strength under sunlight exposure. Fire Retardant Options: Certain resins meet Class I flame retardant standards and ASTM requirements.

Applications

Pultruded FR

P cable trays are widely used in industrial, commercial, and residential sectors, including: Offshore and coastal platforms: Resistant to seawater and extreme weather. Oil, gas, and chemical plants: Withstand corrosive chemicals and high temperatures. Water treatment plants: Resist high humidity and chemical exposure.

Telecom and power distribution: Support low-voltage, high-voltage, and fiber-optic cables.

Summary

The pultrusion process produces FRP cable trays that combine strength, corrosion resistance, and lightweight properties, making them suitable for harsh and demanding environments. By selecting appropriate resins and tray types, engineers can optimize cable management systems for safety, durability, and ease of installation.

Pultrusion process cable trays - ROGER FIBRE ATELIER [PDF]

Pultrusion process cable trays

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Technical note

This reference is intended for preliminary fiber and communications infrastructure research. Optical interface, fiber type, port or core capacity, electrical input and output, enclosure protection, cooling, installation limits and applicable standards must be verified for the specific project.

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