Aerogel felt, also known as an aerogel insulation blanket, is increasingly used in industrial and commercial insulation projects where thermal efficiency, limited installation space, moisture resistance, and long-term reliability are important.

Compared with many conventional insulation materials, aerogel felt offers low thermal conductivity in a thinner and lighter structure. It can be wrapped around pipes, valves, tanks, ducts, and irregular equipment surfaces, making it suitable for applications in oil and gas, LNG, petrochemical processing, power generation, marine engineering, industrial equipment, and HVAC systems.

However, aerogel insulation products are available in different temperature grades, thicknesses, reinforcement materials, densities, and fire-performance classifications. Choosing the right product requires more than comparing prices.

This guide explains the main technical and commercial factors to consider when selecting aerogel felt for your project.

What Is Aerogel Felt?

Aerogel felt is a flexible thermal insulation material produced by combining silica aerogel with a fibrous reinforcement material, such as fiberglass or other heat-resistant fibers.

Silica aerogel contains a nanoporous structure that limits heat transfer through the insulation layer. The fibrous reinforcement provides flexibility, mechanical strength, and easier handling during transportation and installation.

Depending on the product grade and intended application, aerogel felt may provide the following advantages:

Low thermal conductivity

High insulation performance with reduced thickness

Lightweight and flexible construction

Hydrophobic and moisture-resistant properties

Easy installation around complex shapes

Reduced heat loss and energy consumption

Suitability for hot, cold, and cryogenic applications

Long-term performance in demanding environments

These characteristics make aerogel felt particularly valuable when conventional insulation is too thick, too heavy, or vulnerable to moisture.

1. Confirm the Operating Temperature

The operating temperature is one of the most important factors when choosing aerogel felt.

Different aerogel blanket grades are designed for different temperature ranges. A product intended for HVAC or low-temperature systems may not be suitable for steam pipelines, furnaces, exhaust systems, or other high-temperature equipment.

Common application categories include:

Cryogenic and low-temperature pipelines

Chilled-water and refrigeration systems

HVAC ducts and equipment

Hot-water pipelines

Steam distribution systems

Industrial process piping

Boilers and heat exchangers

Exhaust and high-temperature equipment

When evaluating a product, check both its recommended continuous operating temperature and its maximum temperature limit.

The selected aerogel felt should have a continuous temperature rating above the actual operating temperature of the system. An appropriate safety margin can help maintain material stability and insulation performance during temperature fluctuations or temporary operating peaks.

2. Compare Thermal Conductivity at the Correct Temperature

Low thermal conductivity is one of the main reasons buyers choose aerogel insulation.

Depending on the product formulation, test method, density, and operating temperature, aerogel felt may have a thermal conductivity of approximately 0.013 to 0.020 W/m·K under specified test conditions.

However, thermal conductivity is not a single fixed value. It normally changes as the mean insulation temperature increases or decreases.

When comparing products, review:

Thermal conductivity at the expected mean temperature

Applicable testing standards

Product density

Temperature range

Required thermal resistance

Heat-loss or surface-temperature targets

Do not compare products using only the lowest conductivity value shown in a brochure. Ask the supplier for a complete thermal conductivity curve or test report covering the relevant working temperature.

Aerogel felt is particularly useful when a project requires:

Reduced heat loss

Improved energy efficiency

Lower external surface temperatures

Thinner insulation systems

More usable space around pipes or equipment

Reduced weight on supporting structures

3. Calculate the Required Insulation Thickness

The correct insulation thickness should be determined according to the actual operating conditions rather than selected from a standard thickness alone.

The required thickness may depend on:

Operating temperature

Ambient temperature

Pipe or equipment diameter

Wind speed

Indoor or outdoor installation

Desired outer-surface temperature

Allowable heat-loss rate

Condensation-control requirements

Personnel protection requirements

Local energy-efficiency standards

Aerogel felt is commonly supplied in multiple thicknesses and may be installed in one or more layers.

Because it offers high thermal resistance in a relatively thin structure, aerogel insulation can often reduce the total insulation thickness compared with mineral wool, fiberglass, or calcium silicate systems designed for similar thermal targets.

This can be especially useful for:

Offshore platforms

Marine vessels

Congested pipe racks

Compact industrial equipment

Retrofit projects

Skid-mounted systems

Areas with limited clearance

Pipes installed close to walls or adjacent equipment

For major projects, thermal calculations should be completed before confirming the final product thickness.

4. Evaluate the Installation Environment

The installation environment affects the required product structure, protective system, and long-term durability.

Indoor Applications

For indoor installations, buyers should focus on:

Operating temperature

Fire performance

Thermal conductivity

Dust control

Ease of cutting and wrapping

Compatibility with jacketing or protective finishes

Worker handling requirements

Indoor applications may still require vapor barriers, protective coverings, or mechanical protection depending on the equipment and facility conditions.

Outdoor Applications

Outdoor insulation systems must withstand changing weather conditions.

Important considerations include:

Rain and water exposure

Wind

Temperature cycling

Ultraviolet exposure

Mechanical impact

Protective cladding requirements

Sealing of joints and penetrations

Aerogel felt should normally be installed beneath suitable metal cladding or another weatherproof protective system. Although the insulation itself may be hydrophobic, the complete insulation system must be properly designed and sealed.

Marine and Offshore Applications

Marine and offshore installations are exposed to particularly demanding conditions, including:

High humidity

Salt-laden air

Condensation

Restricted installation space

Weight limitations

Frequent temperature changes

Corrosive operating environments

Hydrophobic aerogel felt can be suitable for these environments because it combines moisture resistance, lightweight construction, reduced thickness, and flexibility.

However, the complete system should also include appropriate cladding, sealing, fastening, and corrosion-control measures.

5. Review Moisture Resistance and CUI Risk

Moisture intrusion is a common cause of insulation-system deterioration.

When water enters an insulation system, it may:

Increase thermal conductivity

Reduce insulation efficiency

Cause condensation

Damage protective cladding

Accelerate corrosion under insulation

Increase inspection and maintenance costs

Aerogel felt is typically treated to be hydrophobic, which means it resists the absorption of liquid water.

Some aerogel insulation products also allow water vapor to pass through the structure, which may help reduce trapped moisture when the overall insulation system is correctly designed.

This makes aerogel felt a strong option for industries where corrosion under insulation, or CUI, is a major concern, such as:

Oil and gas

Petrochemical processing

Chemical plants

Refineries

LNG facilities

Offshore platforms

Marine piping systems

However, hydrophobic insulation alone cannot eliminate CUI. Proper surface preparation, coating selection, weather barriers, cladding design, sealing, inspection, and maintenance remain essential.

6. Verify Fire and Smoke Performance

Fire safety requirements vary according to the country, industry, application, and facility classification.

Before purchasing aerogel felt, verify whether the product has been tested for relevant properties such as:

Non-combustibility

Flame spread

Smoke development

Surface burning characteristics

Fire resistance

Toxicity of smoke or decomposition products

Depending on the project, required standards may include relevant ASTM, EN, ISO, IMO, or local building and industrial regulations.

Do not rely only on general claims such as "fireproof" or "non-combustible." Request supporting documents from the supplier, including:

Test reports

Product data sheets

Certificates

Test standard references

Laboratory information

Applicable product classification

The test result should match the exact aerogel felt grade, thickness, reinforcement, and facing material being offered.

7. Check Flexibility and Installation Requirements

Aerogel felt is flexible and can be installed around many shapes that are difficult to insulate with rigid boards.

Typical applications include:

Straight pipes

Elbows

Valves

Flanges

Tees

Heat exchangers

Storage tanks

Process vessels

Ductwork

Irregular equipment surfaces

Good flexibility can reduce installation difficulty and minimize gaps around complex components.

Before placing an order, confirm:

Roll width and length

Available thicknesses

Minimum bending radius

Cutting method

Recommended overlap

Number of insulation layers

Fastening method

Joint treatment

Cladding requirements

Recommended personal protective equipment

Although aerogel felt can simplify installation, workers should follow the supplier's handling instructions. Some products may generate dust during cutting and should be installed using suitable protective equipment and ventilation.

8. Consider Compressive Strength and Mechanical Durability

Flexibility is important, but the product must also maintain its structure during handling, installation, and long-term operation.

For projects involving vibration, repeated maintenance, foot traffic, or mechanical stress, evaluate:

Tensile strength

Compression recovery

Dimensional stability

Resistance to vibration

Resistance to repeated thermal cycling

Compatibility with fastening systems

Resistance to handling damage

In areas where the insulation may be exposed to impact or compression, additional mechanical protection may be required.

A stronger or denser aerogel blanket is not automatically the best choice. The correct balance between thermal performance, flexibility, durability, weight, and cost should be selected according to the application.

9. Confirm Product Dimensions and Supply Format

Aerogel felt is normally supplied in rolls, but dimensions vary by manufacturer and product grade.

Before ordering, confirm:

Standard roll width

Roll length

Available thicknesses

Density

Reinforcement material

Facing or foil options

Packaging method

Pallet dimensions

Container-loading quantity

Minimum order quantity

Custom-cutting availability

Custom dimensions may reduce material waste and installation time, particularly for repetitive pipe sizes or equipment modules.

For international projects, also consider packaging strength, moisture protection during shipping, and product identification on each roll.

10. Evaluate Total Lifecycle Cost

Aerogel felt generally has a higher initial material cost than conventional insulation such as mineral wool or fiberglass.

However, purchasing decisions should be based on total installed and lifecycle cost rather than material price per square meter alone.

Potential lifecycle benefits may include:

Reduced insulation thickness

Lower energy consumption

Reduced heat loss

Lower structural loading

Faster installation

Less complicated fabrication around valves and fittings

Reduced space requirements

Lower maintenance frequency

Improved moisture resistance

Reduced risk of insulation replacement

Easier retrofit installation

The economic value may be especially significant in facilities that operate continuously or where shutdowns, maintenance access, and space limitations create high costs.

When comparing quotations, consider:

Material cost

Installation labor

Cladding cost

Supporting structure requirements

Energy savings

Maintenance frequency

Expected service life

Replacement cost

Downtime

CUI inspection requirements

11. Review Supplier Documentation and Quality Control

A reliable aerogel felt supplier should provide more than a general product brochure.

Before approving a product, request:

Technical data sheet

Safety data sheet

Thermal conductivity test report

Operating-temperature information

Fire-performance documentation

Hydrophobicity or water-resistance data

Product density and dimensional tolerances

Recommended installation instructions

Quality inspection procedures

Batch traceability information

Packaging and storage requirements

For large projects, buyers may also request product samples, third-party testing, pre-shipment inspection, or trial installation.

It is important to confirm that the supplied product is consistent with the technical documents used during project approval.

Typical Applications of Aerogel Felt

Oil and Gas

Aerogel felt is used for pipelines, valves, refineries, processing equipment, LNG facilities, and storage systems where thermal efficiency, reduced insulation thickness, and moisture resistance are required.

LNG and Cryogenic Systems

Selected aerogel insulation grades can be used in low-temperature and cryogenic applications to help control heat gain, reduce condensation, and limit insulation thickness.

The exact product should be selected according to the minimum operating temperature and complete insulation-system design.

Power Generation

Aerogel felt can be applied to steam lines, boilers, turbines, heat exchangers, and other high-temperature equipment to reduce heat loss and improve personnel protection.

Marine and Offshore Engineering

Its lightweight and flexible structure makes aerogel felt suitable for engine rooms, piping systems, offshore modules, and space-constrained marine installations.

Chemical and Petrochemical Processing

Aerogel insulation may be used on reactors, vessels, tanks, pipelines, and process equipment operating under demanding temperature and moisture conditions.

Industrial Equipment

It is suitable for compact machinery, skids, thermal systems, and irregular equipment surfaces where rigid insulation is difficult to install.

HVAC Systems

Aerogel felt can be used in specialized ductwork, chilled-water systems, equipment enclosures, and retrofit projects where limited space requires a thinner insulation solution.

Aerogel Felt Selection Checklist

Before requesting a quotation, prepare the following project information:

Application type

Operating temperature

Maximum and minimum temperatures

Pipe or equipment dimensions

Indoor, outdoor, marine, or offshore environment

Required insulation thickness

Target heat-loss rate

Required outer-surface temperature

Fire-performance standards

Cladding material

Total required quantity

Roll-size preference

Project location

Installation schedule

Required certificates or test reports

Providing this information allows the supplier to recommend a more suitable aerogel felt grade and prepare a more accurate quotation.

Why Choose Keep Insulation Aerogel Felt?

Keep Insulation provides aerogel felt solutions for industrial, energy, marine, HVAC, and commercial thermal insulation applications.

Our available solutions can be selected according to project requirements such as operating temperature, insulation thickness, installation environment, roll dimensions, and application type.

Key product advantages include:

Low thermal conductivity

Reduced insulation thickness

Hydrophobic performance

Lightweight and flexible structure

Easy installation around complex equipment

Multiple thickness and dimension options

Suitability for demanding industrial environments

Technical selection support

Custom supply options for project requirements

Whether your project involves hot pipelines, cryogenic systems, process equipment, offshore facilities, or compact HVAC installations, our team can assist with product selection based on your technical specifications.

Contact Keep Insulation and provide your operating temperature, equipment dimensions, required thickness, application environment, and project quantity to receive a suitable aerogel felt recommendation.

Frequently Asked Questions

Is aerogel felt better than mineral wool?

Aerogel felt generally has lower thermal conductivity and can achieve the required thermal resistance with less thickness than mineral wool.

It may be a better choice for space-constrained, lightweight, humid, offshore, or high-value industrial applications. Mineral wool may still be more economical for projects where installation space is not limited and moisture exposure can be effectively controlled.

The better option depends on temperature, available space, budget, fire requirements, installation conditions, and lifecycle cost.

Can aerogel felt be used outdoors?

Yes. Aerogel felt can be used outdoors when it is installed as part of a properly designed insulation system with suitable protective cladding, sealed joints, weather barriers, and mechanical fastening.

The aerogel blanket should not be treated as a substitute for external weather protection.

Does aerogel felt absorb water?

Most industrial aerogel felt products are hydrophobic and resist liquid-water absorption.

However, product performance may vary by grade and manufacturer. Buyers should review the relevant water-resistance data and ensure that cladding, joints, and penetrations are correctly sealed.

Is aerogel felt suitable for high-temperature pipelines?

Yes, provided the selected product grade is designed for the required operating temperature.

Always check the continuous-use temperature, maximum temperature, thermal conductivity curve, reinforcement material, and fire-performance documentation before approval.

Can aerogel felt be used for cryogenic insulation?

Certain aerogel blanket grades are designed for low-temperature and cryogenic applications.

Selection should be based on the minimum operating temperature, condensation-control requirements, vapor-barrier design, number of layers, and complete insulation-system configuration.

Is aerogel felt difficult to install?

Aerogel felt is flexible and can be cut and wrapped around pipes, elbows, valves, and irregular equipment.

Installation is generally straightforward when workers follow the recommended overlap, fastening, layering, and cladding procedures. Appropriate protective equipment may be required during cutting and handling.

How do I calculate the correct aerogel blanket thickness?

The required thickness should be calculated using the operating temperature, ambient conditions, pipe or equipment dimensions, thermal conductivity, target heat loss, and desired surface temperature.

For important industrial projects, request a thermal calculation rather than selecting thickness only by experience.

Conclusion

Choosing the right aerogel felt requires a careful review of operating temperature, thermal conductivity, insulation thickness, environmental exposure, moisture resistance, fire performance, mechanical durability, installation method, and total lifecycle cost.

The lowest-priced product is not always the most economical solution. A correctly selected aerogel insulation system can help reduce heat loss, save installation space, improve energy efficiency, simplify insulation around complex equipment, and support more reliable long-term operation.

Before placing an order, provide the supplier with complete project conditions and request the relevant technical data, testing documentation, installation guidance, and product recommendations.

Keep Insulation offers aerogel felt solutions for a wide range of industrial and commercial applications. Contact us with your project specifications to discuss the appropriate temperature grade, thickness, dimensions, and supply format for your insulation system.