Density refers to the mass of material per unit volume. For ceramic fiber blankets, it affects not only product weight but also tensile strength within the same product series and the thermal design of the installed insulation layer.

Selecting the appropriate density requires evaluating these factors against actual project requirements rather than simply choosing a lighter or heavier grade.

CCEWOOL Ceramic Fiber Blanket is available in 64, 96, 128, and 160 kg/m3 densities. By considering tensile strength, weight and thermal performance, and installation and Fabrication requirements, customers can better determine which specification suits their furnace lining applications.

Tensile Strength Data Within the Same Series Supports Material Handling and Fabrication

Taking CCEWOOL HPS2300 Ceramic Fiber Blanket as an example, the product data sheet lists the following tensile strength values for different densities according to EN 1094-1:

64 kg/m3: 45 kPa

96 kg/m3: 65 kPa

128 kg/m3: 85 kPa

160 kg/m3: 125 kPa

Within this product series, tensile strength increases as density increases.

These data help customers compare the blanket integrity required during handling, slitting, and cutting. However, they should not be used as a substitute for evaluating material performance after prolonged exposure to high temperatures.

For projects involving frequent handling, narrow-width slitting, or batch Fabrication, specifications with higher tensile strength can help maintain blanket integrity during processing.

For lightweight backup insulation or filling applications with minimal mechanical disturbance, lower-density products can also be evaluated according to fixing and installation requirements.

Using comparable data from the same product series provides a more reliable basis for selection rather than assigning a fixed application to each density grade.

Weight and Thermal Conductivity at the Same Thickness Influence Insulation Design

At the same surface area and nominal thickness, higher-density blankets have greater mass.

For a nominal thickness of 25 mm, the calculated mass per unit area is:

64 kg/m3: approximately 1.6 kg/m2

96 kg/m3: approximately 2.4 kg/m2

128 kg/m3: approximately 3.2 kg/m2

160 kg/m3: approximately 4.0 kg/m2

These values are calculated from nominal density and thickness and provide a useful reference for preliminary comparisons of handling weight and material selection.

For large-area backup insulation or multilayer installations, differences in individual layer weight can also affect the overall installation requirements.

Beyond weight, ceramic fiber blanket insulation selection must consider thermal conductivity at the relevant density and temperature, together with the required insulation thickness.

For example, the CCEWOOL HPS2300 Ceramic Fiber Blanket data for 128 kg/m3 lists thermal conductivity values of:

400°C: 0.10 W/(m·K)

800°C: 0.20 W/(m·K)

These values demonstrate why thermal conductivity data must always be evaluated together with the corresponding temperature conditions. Other density grades require their own applicable data and should not be estimated directly from the 128 kg/m3 specification.

In practical selection, lower-density blankets can help reduce material weight, while the required insulation performance depends on both thickness and the corresponding thermal conductivity.

Tensile strength and thermal performance address different requirements. Considering both provides a more complete basis for balancing handling needs and insulation design.

Installation Conditions and Fabrication Requirements Determine the Appropriate Density

For flat-laid insulation, curved-surface wrapping, and cold-face backup insulation, material weight, surface conformity, and fixing arrangements are important considerations.

For insulation behind Ceramic Fiber Modules or in gap-filling applications, the required compression must also be confirmed.

When a ceramic fiber blanket is compressed, its installed thickness decreases and its actual density changes. Thermal performance should therefore be evaluated under the installed conditions rather than using the nominal uncompressed thickness.

For cut-to-size processing, slitting, custom-width fabrication, and flexible insulation components, material selection should also consider cutting integrity and handling strength.

64 kg/m3 can be evaluated for lightweight backup insulation with limited mechanical disturbance.

96 and 128 kg/m3 can be compared according to flexibility, tensile strength, and processing requirements.

160 kg/m3 can be considered for applications requiring higher tensile strength.

These are general selection guidelines rather than fixed relationships between density and application.

CCEWOOL offers ceramic fiber blankets in multiple densities, thicknesses, and dimensions, with custom cut-to-size Fabrication support.

The appropriate density should be selected by evaluating:

Actual Operating Temperature and Insulation Requirements + Available Thickness and Installed Conditions + Tensile Strength and Fabrication Needs

This approach helps translate density selection into product specifications suited to actual furnace lining requirements.

By combining technical product data with flexible dimensional options and Fabrication support, CCEWOOL helps customers select suitable ceramic fiber blanket specifications for their insulation projects.