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Modular Cleanroom Panels Specifications — Materials, Thickness, Fire Rating & Installation Guide
Modular cleanroom panels specifications are the blueprint for your facility’s containment strategy, directly influencing energy costs, ISO compliance, and fire safety. This guide moves beyond basic datasheets to cover practical material choices, thickness trade-offs, thermal calculation realities, and sealing methods — plus downloadable CAD and an RFP-ready spec template curated by the engineering team at Deiiang™.
Introduction
Defining precise modular cleanroom panels specifications is often the difference between a smooth certification process and a costly retrofit. Whether you are scaling up pharmaceutical manufacturing, electronics assembly, or biotechnology research, the panel system acts as your primary barrier against contamination.
With over 15 years of field data in Modular Cleanroom Design, Deiiang™ engineers have compiled this resource to bridge the gap between theoretical specs and on-site reality. The content includes downloadable specification tables, CAD details, and real-world calculation tools to streamline your cleanroom planning process.
modular cleanroom panels
Why Panel Specifications Matter
Selecting appropriate panel material for modular cleanroom applications goes beyond aesthetics. We have seen how inadequate specifications can lead to operational failures such as:
- Micro-cracks in face sheets causing compromised cleanliness classification (failing ISO 14644).
- HVAC overload and reduced energy efficiency due to poor thermal bridging.
- Wall bowing or deflection under positive pressure conditions (common in under-specced panels).
- Delamination issues leading to increased maintenance costs.
- Immediate facility closure due to non-compliance with fire safety regulations.
In a recent case study, a pharmaceutical facility that opted for generic, low-density fire rating cleanroom panels faced a mandatory regulatory shutdown. The core material delaminated under heat stress during a test, failing ASTM E84 Class A requirements, resulting in 3 weeks of production delays and significant lost revenue.
Common Panel Types & Typical Use Cases
Aluminum Honeycomb Panels
Known for being lightweight yet rigid, these modular cleanroom panels feature aluminum face sheets bonded to an aluminum honeycomb core. Deiiang™ engineers recommend these for ISO Class 5-8 cleanrooms where ceiling loads and ease of reconfiguration are key factors.
- Core density: Optimized at 30-40 kg/m³ to prevent “oil-canning”
- Compressive strength: 0.8-1.2 MPa
- Thermal conductivity: 0.05-0.07 W/m·K
- Typical weight: 8-12 kg/m² (Lowest load on building structure)
- Cleanability: Excellent with PVDF coating
Real-world note: Electronics assembly cleanrooms requiring ESD protection favor this type. A 50mm thickness typically achieves a U-value of 0.45 W/m²·K.
PU/PIR Insulated Sandwich Panels
Polyurethane (PU) or polyisocyanurate (PIR) core panels provide superior thermal insulation, making them the standard for temperature-controlled facilities. These insulated cleanroom panels are the go-to choice for GMP pharmaceutical applications.
- Core density: 40-50 kg/m³ (Ensures rigidity without added weight)
- Compressive strength: 0.15-0.25 MPa
- Thermal conductivity: 0.022-0.028 W/m·K (Best in class insulation)
- Typical weight: 15-25 kg/m²
- Cleanability: Good with epoxy coating
Example calculation: A 60mm thick PU panel with conductivity 0.025 W/m·K provides U-value = 1/(0.06/0.025 + 0.04 + 0.13) = 0.37 W/m²·K.
Mineral Wool / Rockwool Panels
When fire code is the primary constraint, Rockwool is non-negotiable. These panels offer exceptional fire resistance and acoustic performance, though they are heavier to install.
- Core density: High density 80-150 kg/m³ required for vertical stability
- Compressive strength: 0.04-0.08 MPa
- Thermal conductivity: 0.035-0.045 W/m·K
- Typical weight: 25-40 kg/m² (Requires structural verification)
- Cleanability: Moderate with appropriate coating
Stainless Steel-Faced Panels
With excellent corrosion resistance and cleanability, these panels are the standard for high-washdown pharmaceutical sterile areas and food processing cleanrooms.
- Face sheet thickness: Recommend 0.8mm minimum to prevent denting
- Surface roughness (Ra): 0.4-0.8 μm
- Thermal conductivity: Varies with core material
- Typical weight: 20-35 kg/m²
- Cleanability: Excellent, withstands aggressive VHP disinfectants
Key Specification Parameters
Material & Face Sheets
Face sheet selection impacts durability against accidental cart impacts and corrosion. Deiiang™ offers:
- Galvanized steel (0.5-0.8mm) with PVDF coating for standard corridors and changing rooms
- Stainless steel 304/316 (0.5-1.0mm) for wet processes and corrosive environments
- Aluminum (0.8-1.2mm) with powder coating where magnetic interference is a concern
Core Type & Properties
The core material determines thermal performance, fire resistance, and structural characteristics:
- PU/PIR core: Density 40-50 kg/m³, check for fire class B1/B-s1,d0
- Mineral wool: Density 100-150 kg/m³, achieves non-combustible fire class A2-s1,d0
- Aluminum honeycomb: Cell size 6-12mm, lightweight fire class A2-s1,d0
Panel Thickness Options and Recommended Uses
| Thickness (mm) | Application | ISO Class Typical | U-value Range (W/m²·K) |
|---|---|---|---|
| 25-40 | Return air chases, changing rooms | ISO 8-9 | 0.65-0.85 |
| 40-60 | Electronics assembly, R&D (Industry Standard) | ISO 6-7 | 0.40-0.60 |
| 60-80 | Pharmaceutical manufacturing (Flush Glazing Compatible) | ISO 5-7 | 0.25-0.40 |
| 80-100 | Bio-containment, Temp Controlled Warehousing | ISO 4-5 | 0.18-0.28 |
Modular Cleanroom Panels Weight and Handling Limits
Panel weight affects structural requirements and installation logistics:
- Aluminum honeycomb: 8-12 kg/m² (easy manual handling)
- PU insulated: 15-25 kg/m² (mechanical assistance recommended for heights >3m)
- Mineral wool: 25-40 kg/m² (Mandatory mechanical handling)
Example: For a 3m × 2.4m mineral wool panel (30 kg/m²), total weight = 3 × 2.4 × 30 = 216 kg, requiring vacuum lifters or scissor lifts.
Thermal Performance Calculation
U-value calculation formula: U = 1 / (Rsi + Rpanel + Rse)
Where Rpanel = thickness (m) / thermal conductivity (W/m·K)
Standard resistances: Rsi = 0.13 m²·K/W (internal), Rse = 0.04 m²·K/W (external)
Example: 60mm PU panel (λ=0.025 W/m·K): Rpanel = 0.06/0.025 = 2.4 m²·K/W
U = 1 / (0.13 + 2.4 + 0.04) = 0.389 W/m²·K
Fire Rating Standards
Fire rating cleanroom panels must comply with regional standards to obtain occupancy permits:
- ASTM E84 (North America): Class A (0-25 flame spread) is the standard expectation.
- EN 13501 (Europe): A2-s1,d0 (non-combustible), B-s1,d0 (very limited contribution)
- Local codes: NFPA 318 (Semiconductor), IBC, GB standards (China)
Deiiang™ panels typically achieve ASTM E84 Class A and EN 13501 A2-s1,d0 ratings.
Air Tightness Performance
Critical for maintaining pressure differentials and reducing AHU load:
- Standard performance: ≤1.5 L/s·m² at 50 Pa pressure difference
- High performance: ≤0.5 L/s·m² at 50 Pa pressure difference
- Pharmaceutical grade: ≤0.3 L/s·m² at 50 Pa (Required for containment)
Surface Finish & Cleanability
Surface properties impact contamination control and resistance to “ghosting” effects:
- Surface roughness (Ra): 0.4-0.8 μm for optimal cleanability
- Chemical resistance: Must withstand isopropyl alcohol, hydrogen peroxide vapor, quaternary ammonium compounds
- Coved corners: Minimum 25mm radius integrated tracks for pharmaceutical applications
Modular cleanroom panels Standard Spec Table
| Parameter | Typical Value Range | Unit | Recommendation / Notes |
|---|---|---|---|
| Panel Type | Honeycomb, PU, Mineral Wool, SS | – | Match core to fire/thermal needs |
| Thickness | 25-100 | mm | 50mm is the versatile standard |
| Weight | 8-40 | kg/m² | Check floor loading capacity |
| U-value | 0.18-0.85 | W/m²·K | Calculated based on core λ |
| Fire Rating | A2-s1,d0 / Class A | – | Verify local code before ordering |
| Surface Finish | PVDF, Epoxy, SS | – | PVDF for durability, SS for GMP |
| Max Joint Gap | 2-5 | mm | Sealed with silicone/mastic |
| Maintenance Interval | 6-24 | months | Visual inspection of seals |
Download Complete Excel Spec Sheet
Get our comprehensive specification template with all parameters, calculations, and vendor comparison checklist.
Joint Design & Installation Details
Proper cleanroom panel installation details are critical. A panel is only as good as its seal:
Tongue-and-Groove Joints
Most common system with integrated gasket channels
- Air leakage: ≤0.5 L/s·m² at 50 Pa
- Installation tolerance: ±1.5 mm
- Recommended for: ISO 5-8 general cleanrooms
Male/Female Joints
Positive interlocking system with thermal break
- Air leakage: ≤0.3 L/s·m² at 50 Pa
- Installation tolerance: ±1.0 mm
- Recommended for: ISO 3-5 high-spec cleanrooms
Clip Systems
Concealed fastening for seamless appearance
- Air leakage: ≤0.4 L/s·m² at 50 Pa
- Installation tolerance: ±1.0 mm
- Recommended for: Architectural finish requirements
Sealant & Gasket Specifications
- Material: Silicone (food grade if required), EPDM, or closed-cell neoprene
- Temperature range: -40°C to +120°C
- Compression set: ≤10% after 1000 hours at 70°C
- Chemical resistance: Withstand common cleanroom disinfectants without drying out
Tolerances & Flatness Requirements
Proper installation ensures optimal performance and prevents “ledges” for dust:
- Panel flatness: ≤2 mm over 2m length
- Joint alignment: ≤1.5 mm deviation (flush surface)
- Vertical alignment: ≤3 mm over 3m height
- Anchoring spacing: 600-1200 mm depending on panel weight
Cleanability, Surface Treatments & Maintenance
Chemical Resistance Guide
| Disinfectant | PVDF Coating | Epoxy Coating | Stainless Steel |
|---|---|---|---|
| Isopropyl Alcohol (70%) | Excellent | Excellent | Excellent |
| Hydrogen Peroxide (3%) | Good | Good | Excellent |
| Quaternary Ammonium | Excellent | Good | Excellent |
| Sodium Hypochlorite (1%) | Fair (Risk of staining) | Poor (Micro-pitting) | Good |
Recommended Cleaning Procedures
Proper maintenance extends panel life. Note that incorrect cleaning agents are the #1 cause of coating failure.
- Frequency: Weekly for ISO 5-6, monthly for ISO 7-8
- Method: Wipe with lint-free cloth and approved disinfectant (Top to Bottom)
- Pressure: 0.5-1.0 bar for spray applications
- Rinse: Deionized water for critical applications to prevent residue
Deiiang™ recommends validation of cleaning procedures every 6 months for pharmaceutical applications.
Testing, Certification & Quality Assurance
Comprehensive testing ensures panel performance and regulatory compliance:
Required Tests and Standards
- Fire performance: ASTM E84, EN 13501-1
- Structural integrity: Panel shear test (≥15 kN/m), compressive test (≥0.15 MPa)
- Air leakage: EN 12114 or equivalent at 50-150 Pa
- Surface roughness: ISO 4287 (Ra 0.4-0.8 μm)
- Microbial growth: ASTM G21 for sterile pharmaceutical applications
Documentation Requirements
Request these documents from your modular cleanroom panels supplier before final payment:
- Material certificates (mill certificates for metals)
- Third-party test reports for fire performance (Not just internal lab results)
- Quality control records from production
- Installation and maintenance manuals
- Warranty documentation
FAQ
What thickness for ISO 7 cleanroom?
For ISO Class 7 cleanrooms, Deiiang™ typically recommends 50-60mm thick panels with U-values between 0.35-0.50 W/m²·K. This provides the sweet spot between adequate insulation, structural integrity, and cost efficiency.
Are honeycomb panels fire rated?
Yes, properly constructed aluminum honeycomb panels can achieve fire ratings up to A2-s1,d0 (EN 13501-1) and Class A (ASTM E84). However, the adhesive used is the critical factor—always check the glue specs.
How to clean panel seams?
Clean panel seams using lint-free wipes. For stubborn contamination, use soft plastic scrapers followed by disinfectant. Never use metal tools, as scratching the coating creates rust points. Deiiang™ recommends quarterly inspection of seams.
What is the typical lifespan of cleanroom panels?
With proper maintenance, Deiiang™ modular cleanroom panels typically last 15-25 years. PVDF-coated steel panels show minimal degradation after 20 years, provided they are not exposed to unapproved caustic cleaners.
Can existing panels be modified for new requirements?
Yes, within limits. Deiiang™ offers panel modification services including cutouts for new utilities. However, cutting panels onsite releases particulates, so strict containment protocols must be used.
Resources & Downloads
Access these valuable resources for your Modular Cleanroom Design project:
- DWG/CAD Details – Standard panel details and joint configurations
- Excel Spec Template – Customizable specification spreadsheet
- Testing Standards Reference – Complete list of relevant ISO, ASTM, and EN standards
- Deiiang™ Panel Spec Whitepaper – Technical deep dive (12 pages)
Conclusions & Next Steps
Proper modular cleanroom panels specifications are fundamental to achieving your required cleanliness classification. This guide has provided the engineering baseline you need.
For your specific application, Deiiang™ recommends:
- Download our complete specification sheet for your RFP process
- Request quotations from at least three qualified suppliers to compare core density and steel thickness
- Schedule a technical review with Deiiang™ engineers to validate your specifications
