Aluminum Silicate Fiber Blanket for Ducts

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Aluminum Silicate Fiber Blanket for Ducts | Shenzhou

Aluminum Silicate Fiber Blanket is wrapped in the outer surface of the building smoke prevention and exhaust metal steel pipe to achieve the rated fire resistance limit. Aluminum Silicate Fiber Blanket is also suitable for fire protection of ventilation, oil fume, high temperature exhaust and chemical exhaust pipes.

Aluminum Silicate Fiber Blanket is wrapped in the outer surface of the building smoke prevention and exhaust metal steel pipe to achieve the rated fire resistance limit.

Aluminum Silicate Fiber Blanket is also suitable for fire protection of ventilation, oil fume, high temperature exhaust and chemical exhaust pipes.

Product Introduction

Aluminum Silicate Fiber Blanket for Fire-Rated Duct Wrap

Shenzhou Aluminum Silicate Fiber Blanket is a lightweight, flexible and foil-faced fireproof wrap developed for the external protection of galvanized steel smoke-control and exhaust ducts. Its aluminum silicate fiber core helps reduce heat transfer, while the laminated aluminum foil facing improves handling strength and limits water vapor penetration.

The product is suitable for ventilation ducts, oil-fume exhaust ducts, high-temperature exhaust pipes and chemical exhaust systems in commercial, public and industrial buildings. In the specified duct assembly, 30 mm, 40 mm and 50 mm insulation thicknesses provide fire resistance periods of 60, 90 and 120 minutes respectively.

Aluminum Silicate Fiber Blanket provides a practical solution where lightweight construction, A1 non-combustibility and defined fire-rated system performance are required.

Key Features of the Aluminum Silicate Fireproof Wrap

A1 Non-Combustible Fiber Core

The aluminum silicate fiber core achieves an A1 combustion classification, making it suitable for fire and smoke-control duct applications where non-combustible insulation materials are specified.

60–120 Minute Fire-Rated System Options

Three insulation thicknesses are available for the specified duct-wrap assembly:

- · 30 mm for 60-minute fire resistance

- · 40 mm for 90-minute fire resistance

- · 50 mm for 120-minute fire resistance

This allows project engineers and contractors to select the insulation thickness according to the required fire-resistance period.

Foil-Faced Surface Protection

The laminated aluminum foil facing enhances operational strength and helps protect the fiber core against water vapor penetration during storage, handling and installation.

Lightweight and Flexible

With a core density of 96–128 kg/m³, the blanket is flexible enough to wrap around rectangular or irregular duct sections while adding limited weight to the duct-supporting structure.

Low Thermal Conductivity

The Aluminum Silicate Fiber Blanket has a thermal conductivity of 0.141 W/(m·K) at an average temperature of 500°C, helping slow heat transfer through the duct enclosure.

Thermal Stability

A permanent linear change of 1.7% after exposure to 1000°C for 24 hours supports dimensional stability under elevated-temperature conditions.

Practical Installation

The flexible blanket can be wrapped around the external surface of galvanized steel ducts and secured with welding pins according to the approved fireproofing system drawing.

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