Product Overview
Polyurethane Sandwich Wall Panels are high-performance insulated building envelope materials designed for industrial steel structures, cold storage facilities, logistics centers, and controlled environment buildings.
The panel consists of two pre-coated steel sheets bonded to a rigid PU (Polyurethane) or PIR (Polyisocyanurate) foam core, forming a continuous insulation and structural wall system.
Technical Specifications
|
Item |
Specification |
|
Panel Type |
PU / PIR Sandwich Wall Panel |
|
Steel Thickness |
0.4 – 0.8 mm |
|
Core Density |
38 – 45 kg/m³ |
|
Thickness Range |
40 / 50 / 75 / 100 / 120 / 150 / 200 mm |
|
Effective Width |
1000 mm |
|
Length |
2 – 12 m (customizable) |
|
Thermal Conductivity |
0.019 – 0.024 W/m·K |
|
Fire Performance |
B1 / B2 (PIR enhanced system available) |
|
Water Absorption |
< 2% |
|
Installation System |
Tongue & groove / Hidden fastener system |
Key Engineering Advantages
Fire Safety
A1 non-combustible material
No flame spread or ignition
No toxic smoke emission
Maintains structural integrity under high temperature
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Thermal Efficiency
Reduces heat transfer through building envelope
Improves energy efficiency of HVAC systems
Suitable for extreme climate zones
02
Acoustic Insulation
High-density fiber structure absorbs sound
Reduces industrial noise transmission
Improves working environment quality
03
Structural Stability
High rigidity steel-facing system
Wind load resistance for large-span buildings
Long-term dimensional stability
04
Sustainability
Manufactured from natural basalt rock
Fully recyclable insulation material
Complies with green building requirements
05
Comprehensive Applications
Our heavy-duty envelope systems are deployed globally across critical sectors requiring strict fire separation and thermal zoning:
Energy and Power: Power generation facilities, electrical substations, and control rooms.
Petrochemical and Process Industries: Refinery workshops, chemical storage hubs, and hazardous material enclosures.
Logistics and Infrastructure: Large-span steel structure warehouses, airport logistics hubs, and railway distribution centers.
Advanced Manufacturing: Automotive assembly lines, electronics manufacturing facilities, and heavy industrial plants.
Controlled Environments: Pharmaceutical GMP cleanrooms, data centers, and food processing facilities requiring internal fire-rated partition walls.
System Structure
Outer Steel Sheet
High-Tensile PPGI / PPGL Coating (Standard ribs, micro-ribs, flat surface, or deep-grooved profiles depending on structural requirements).
Core Material
High-Density Basalt Rock Wool Insulation Board.
Inner Steel Sheet
Galvanized or Coated Steel Sheet.
Bonding System
Two-component continuous industrial adhesive application combined with high-pressure thermal lamination for superior peel strength.
Global Project References
Wanxiang steel structure envelope systems have successfully served major international industrial projects:
Saudi Arabia: Petrochemical storage and industrial warehouse complexes.
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UAE: Multi-phase logistics distribution center expansion projects.
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Indonesia: Heavy industrial manufacturing plants and food-grade cold chain projects.
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Mexico: Structural steel automotive parts manufacturing facilities.
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Vietnam: Large-scale electronics manufacturing zones.
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PU vs Rock Wool vs EPS
|
Property |
PU Panel |
Rock Wool |
EPS |
|
Thermal Insulation |
⭐⭐⭐⭐⭐ |
⭐⭐⭐ |
⭐⭐⭐⭐ |
|
Fire Resistance |
⭐⭐⭐ |
⭐⭐⭐⭐⭐ |
⭐⭐ |
|
Weight |
Light |
Heavy |
Light |
|
Installation Speed |
Fast |
Medium |
Fast |
|
Cost Efficiency |
Medium |
High |
Low |
|
Cold Storage Use |
Excellent |
Good |
Limited |
Surface Treatment & Customization
Steel Surface Options
Smooth flat surface
Embossed decorative finish
Ribbed industrial profile
Color System
RAL standard color range
Custom project color matching
UV-resistant coating options
Core Options
PU (standard insulation performance)
PIR (enhanced fire performance system)
Joint Systems
Tongue & groove interlocking system
Hidden screw system
Overlap installation system
Heavy-Duty Export Packaging and Logistics Protection
To guarantee zero damage during transoceanic shipping and multi-modal transit, every shipment includes:
Surface Protection: Tough PE protective film applied to both exterior and interior steel facings (to be peeled off after installation).
Edge Protection: Reinforced structural corner shielding to prevent impact damage during container handling.
Bundled Moisture Barriers: Bundled with moisture-proof wrapping on heavy-duty steel or timber pallets.
Container Stowage Planning: Custom loading configurations using professional dunnage bags and heavy-duty strapping to prevent cargo shifting.
Commercial and Logistics Terms
Minimum Order Quantity (MOQ): 500 - 1,000 square meters (Flexible based on international project specifications).
Production Lead Time: 10 - 20 working days from technical drawing sign-off and deposit receipt.
Container Loading Capacity: Approximately 500 - 900 square meters per 40ft HQ container (Exact volume depends on selected thickness and length optimization).
International Trade Terms: FOB, CIF, CFR, EXW.
Payment Terms: T/T (Telegraphic Transfer), L/C (Letter of Credit) at sight.
Why Partner with Wanxiang?
Dedicated Structural Envelope Authority: Years of specialized manufacturing experience in heavy industrial structural panel systems.
High-Speed Continuous Production: Advanced continuous automated production lines ensuring uniform density, high peel strength, and scalable output.
Global EPC Track Record: Proven capabilities in handling large-scale international projects with complete compliance documentation.
Rigorous QA Infrastructure: Zero-defect policy enforced from raw basalt rock selection to final container sealing.
Factory-Direct Competitive Advantage: Direct manufacturer pricing coupled with high-tier material sourcing advantages.
Certificates
Frequently Asked Questions
Q: What is the fire rating of Rock Wool Sandwich Panels?
A: Rock wool sandwich panels are classified as A1 non-combustible materials according to EN 13501-1 standard equivalent, meaning they do not contribute to fire spread and do not produce toxic smoke under high temperature conditions.
Q: What thickness options are available for industrial projects?
A: Standard thickness ranges from 50mm to 200mm, depending on insulation, fire protection, and structural requirements. Custom thickness can also be produced according to project drawings.
Q: Can Rock Wool Panels be used for cold storage buildings?
A: Yes. Rock wool panels are suitable for cold storage and freezer facilities, especially where fire safety is also required. However, for ultra-low temperature environments, PU/PIR panels may be more energy-efficient.
Q: What is the difference between Rock Wool, PU, and EPS panels?
A: Rock Wool: Best fire resistance (A1 non-combustible)
PU/PIR: Best thermal insulation performance
EPS: Lowest cost but poor fire performance
Rock wool is the preferred solution for industrial buildings with strict fire safety requirements.
Q: What is the typical lead time for production?
A: The standard production lead time is 10–20 working days, depending on order quantity and specification complexity.
Q: Do you provide technical documents for project approval?
A: Yes. We can provide:
Technical datasheets
Fire test report summaries
Installation guidelines
Loading plans
These documents are available for engineering approval and EPC submission.
Q: What surface coatings are available?
A: We offer multiple coating options, including:
Polyester (PE) coating
PVDF coating (high durability, anti-corrosion)
Color options follow the RAL color standard system.
Q: Can you support customized sizes and project-based design?
A: Yes. All panels can be custom-cut according to architectural drawings, including length, thickness, edge profiles, and container loading optimization for export efficiency.
Get a Quote
To provide accurate pricing, please share:
Required panel thickness
Application type (cold storage / factory / warehouse / etc.)
Steel coating type
Project location
Estimated quantity
Our engineering team will respond within 12 hours with a technical quotation.
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