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Vermiculite Fireproof Boards: The A-Grade Non-Combustible Solution for Building Safety & Industrial Insulation
【Summary】 In the construction and industrial fire protection sectors, material selection is a critical decision that directly impacts life safety and asset protection. In recent years, vermiculite boards (expanded vermiculite fireproof boards)—inorganic panels made from expanded vermiculite—have gained significant traction as a preferred solution for fire-rated walls, fire door cores, steel structure cladding, and high-temperature insulation.
In the construction and industrial fire protection sectors, material selection is a critical decision that directly impacts life safety and asset protection. In recent years, vermiculite boards (expanded vermiculite fireproof boards)—inorganic panels made from expanded vermiculite—have gained significant traction as a preferred solution for fire-rated walls, fire door cores, steel structure cladding, and high-temperature insulation.
Luoyang Sanhe New Material Technology Co., Ltd.(Contact: +86-15138766787, Email: sale01@lyshxcl.com, Web: www.lyshxcl.com) is a specialized manufacturer with over 18 years of experience in vermiculite processing. With an annual production capacity of 50,000 m³, we supply high-quality standard vermiculite boards and corrosion-resistant vermiculite boards, fully compliant with industry standards to deliver reliable fire protection for your projects.
This post provides a professional overview of vermiculite board performance, referencing Chinese national standards (JC/T 2341-2015, GB8624-2012) and test data—a practical reference for engineers, specifiers, and procurement professionals.
What is a Vermiculite Board?
According to the industry standard Expanded Vermiculite Fireproofing Board(JC/T 2341-2015), a vermiculite board is defined as a non-combustible, fire-resistant, and thermal-insulating panel formed by pressing expanded vermiculite with inorganic binders and modifiers. The expanded vermiculite itself is a lightweight, porous material derived from heat-treated natural vermiculite ore, offering inherently low thermal conductivity and excellent high-temperature stability.
A-Grade Fire Protection: Eliminating Combustion Risk at the Source
Vermiculite boards achieve the highest Class Anon-combustible rating under GB8624-2012. This means that in a fire, the material:
- Will not ignite or produce flames;
- Will not contribute to fire spread;
- Will not release toxic gasessuch as carbon monoxide or sulfur dioxide；
This inherent safety comes from the raw material—expanded vermiculite is a natural inorganic mineral free of carbon and sulfur elements. It has a melting point of 1370–1400°Cand a maximum service temperature of up to 1200°C.
Fire Resistance: Proven Performance Under Extreme Conditions
Fire resistance ratingis the core metric for evaluating a material's ability to withstand fire exposure. Per JC/T 2341-2015:
- A 25mm thick vermiculite boardmust achieve a fire resistance of no less than 90 minutes.
- High-quality products can reach over 3 hoursin standard tests.
- Structural integrity remains above 98%even at 1200°C.
Our vermiculite boards have passed the GB 8624 Class A non-combustibility test at the National Fire Protection Building Materials Supervision and Inspection Center. Whether used as firewalls, fire door cores, or steel structure fireproof cladding, they effectively block flame spread and heat transfer, buying precious time for evacuation and firefighting efforts.
High-Temperature Performance: Stability When It Matters Most
Fire protection isn't just about non-combustibility—it's about maintaining structural integrity and thermal insulation under heat. Vermiculite boards demonstrate outstanding performance under extreme conditions:
| Performance Indicator | Test Condition | Result |
|---|---|---|
| Thermal Conductivity | At 200°C | ~0.13 W/(m·K) (Excellent insulation) |
| Thermal Conductivity Stability | 1100–1200°C for 5 hours | Remains 0.111–0.141 W/(m·K) |
| Compressive Strength Retention | 1100–1200°C for 5 hours | Only 23% reduction |
| Backside Temperature (Board Wall) | 1120°C for 3 hours | Average just 123°C (Superior heat isolation) |
| Linear Change After Heating | 900°C for 8 hours | Only -0.4% (Minimal cracking/deformation) |
| Long-Term Service Range | Continuous use | -50°C to 1400°C |
These figures confirm that vermiculite boards maintain low thermal conductivity, high compressive strength, and minimal deformation even in extreme heat, ensuring long-lasting, reliable protection.
Environmentally Friendly: A Green Building Material
With growing emphasis on environmental health and sustainability, vermiculite boards stand out:
- Natural mineral composition– contains no asbestosor other harmful substances.
- Low formaldehyde emission– meets the E0 grade standard (≤9mg/100g), safe for indoor applications.
- No toxic fumes– even at high temperatures, no harmful gases are released.
- Reduced carbon footprint– production cuts CO₂ emissions by 67%compared to traditional fireproof materials, with zero SO₂ release during combustion—fully aligned with green building development.
Versatile Applications
Thanks to its comprehensive performance, vermiculite board is widely adopted across multiple sectors:
- Building Fire Protection: Firewalls, fire escape partition walls, steel beam cladding, fire-rated suspended ceilings, fire door cores.
- Industrial Insulation: Blast furnace maintenance passage insulation (withstanding 1200°C molten metal splashes); cable fireproof troughs in power substations (62% lighterthan traditional asbestos products).
- Specialized Engineering: Shipbuilding, aerospace, industrial kiln insulation.
How to Choose the Right Vermiculite Board?
To ensure you select a qualified product, consider these five key factors:
- Standards & Certification:Confirm compliance with JC/T 2341-2015, Class A fire rating per GB8624-2012, and ≥90min fire resistance at 25mm thickness.
- Environmental Compliance:Verify formaldehyde emission ≤9mg/100g for indoor use.
- Manufacturer Credentials:Choose a supplier with ISO9001certification and full-process quality control from raw material selection to final inspection.
- Track Record:Request third-party test reports and references from similar projects.
- Special Requirements:For corrosive or high-humidity environments, opt for specialized corrosion-resistant vermiculite boardsto extend service life.
Why Choose Luoyang Sanhe New Material Technology Co., Ltd.?
- 18+ years of specialized experience in vermiculite deep processing.
- Annual capacity of 20,000 m²with scalable production.
- ISO9001 International Quality Management Systemcertification ensuring end-to-end quality control.
- Products exported globally, serving construction, power, metallurgy, and petrochemical industries.
- Offering both standardand corrosion-resistantvermiculite boards—tailored solutions for demanding environments.
Contact Us
- Mobile-Phone:+86-15138766787
- Email:sale01@lyshxcl.com
- Website:www.lyshxcl.com
- Company:Luoyang Sanhe New Material Technology Co., Ltd.
We welcome inquiries from engineering firms, design institutes, and procurement professionals. Request samples, test reports, or customized solutions today. Choose Sanhe vermiculite boards—a reliable safeguard for building safety and human life.
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