Silica aerogel blankets are thermal insulation materials, not structural elements. However, understanding their mechanical limits is essential to prevent compression damage, performance loss, or system failure in industrial installations.

This guide explains what aerogel can — and cannot — support structurally.

1️⃣ Is Aerogel Load-Bearing?

Short Answer:

❌ Aerogel blankets are not load-bearing materials.

They are designed to:

• Resist light compressive forces
• Maintain thickness under controlled cladding pressure
• Withstand vibration

They are not designed to:

• Support equipment weight
• Replace structural supports
• Carry pipe loads
• Serve as primary mechanical insulation supports

2️⃣ Compressive Strength Basics

Aerogel blanket compressive behavior is typically reported as:

• Compressive stress at 10% deformation (kPa)
• Compression recovery rate
• Density (kg/m³)

Unlike rigid boards, blankets are flexible composites.

Mechanical stress is defined as:

Where:

• σ = stress
• F = applied force
• A = area

If applied stress exceeds material tolerance, thickness reduces — decreasing thermal performance.

3️⃣ Why Compression Matters

Thermal resistance depends directly on thickness:

If insulation is compressed:

• Thickness (L) decreases
• R-value decreases
• Heat loss increases

Excessive compression also causes:

• Permanent deformation
• Reduced recovery
• Joint separation

4️⃣ Typical Mechanical Properties (Indicative)

While values vary by manufacturer, aerogel blankets typically exhibit:

PropertyTypical RangeDensity150–200 kg/m³Compressive strength @10%5–20 kPaTensile strengthModerateFlexibilityHighVibration resistanceExcellent

These numbers indicate limited compressive capacity compared to rigid insulation materials like calcium silicate.

5️⃣ Structural Considerations in Industrial Applications

🔹 Pipe Supports & Shoes

Aerogel should never be placed directly under load-bearing pipe supports.

Instead use:

• Calcium silicate blocks
• High-density insulation inserts
• Pipe shoes
• Structural saddles

Aerogel can be installed around support transitions but not as the primary support medium.

🔹 Vertical Applications

On vertical vessels:

• Blanket weight is low (advantage)
• Mechanical fastening may be required
• Pins or banding used to prevent slippage

Load from upper insulation layers should not overly compress lower layers.

🔹 Cladding Pressure

Over-tightening metal jacketing can:

• Compress insulation
• Reduce thermal efficiency
• Create cold spots

Cladding bands should secure, not crush, the blanket.

🔹 Large Diameter Tanks

For large tanks:

• Wind load acts on cladding, not insulation
• Structural support system must carry cladding load
• Aerogel serves only thermal function

🔹 High-Vibration Equipment

Aerogel performs well under vibration due to flexibility.

Advantages:
✔ Does not crack like rigid boards
✔ Absorbs minor mechanical movement
✔ Maintains surface conformity

However, it still should not carry structural loads.

6️⃣ Comparison with Other Insulation Materials

MaterialLoad BearingCompressive StrengthUse at SupportsAerogel Blanket❌ NoLowNot recommendedMineral Wool❌ LimitedModerateSometimes with insertsCalcium Silicate✔ YesHighCommonly usedFoam Glass✔ YesHighUsed for structural supports

Aerogel excels in thermal performance, not structural strength.

7️⃣ Design Strategies to Protect Aerogel from Structural Stress

✔ Use load-bearing insulation inserts at supports
✔ Avoid point loads
✔ Use saddles and pipe shoes
✔ Distribute pressure evenly
✔ Prevent excessive band tightening
✔ Allow for thermal expansion

8️⃣ Weight Considerations

One major structural advantage of aerogel:

✔ Extremely lightweight
✔ Reduces total insulation system load
✔ Minimizes support spacing requirements
✔ Ideal for offshore and modular systems

While not load-bearing, it reduces overall structural demand.

9️⃣ When Structural Engineering Review Is Required

Consider review when:

• Insulating large-diameter vessels
• Designing removable insulation covers
• Working in seismic zones
• Installing on offshore platforms
• Insulating high-pressure piping with large spans

Mechanical engineers must ensure structural components carry all loads — not the insulation.

🔟 Key Takeaway

Silica aerogel blankets:

✔ Provide exceptional thermal performance
✔ Are flexible and vibration-resistant
✔ Are lightweight
✔ Should NOT carry structural loads

Structural supports must be engineered separately using proper load-bearing materials.

If you share your specific application (pipe size, vertical height, cladding type, load scenario), I can help assess whether additional structural insulation inserts are required.