Description
SIDA laminated wood threaded rods and nuts are specialized fastening solutions designed for thermal break applications in industrial insulation systems. Unlike conventional metal fasteners that create significant thermal bridges, our laminated wood hardware maintains structural integrity while providing 200x lower thermal conductivity than steel.
Manufactured from premium birch veneers laminated under high pressure and impregnated with thermosetting phenolic resin, these components offer dimensional stability across temperatures ranging from -200°C to +80°C. The cross-laminated construction prevents delamination and ensures consistent performance in cryogenic environments, including LNG processing, ethylene production, and industrial refrigeration.
Key Features & Benefits
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Superior Thermal Insulation: Thermal conductivity of only 0.18 W/(m·K) vs. 50 W/(m·K) for carbon steel
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High Mechanical Strength: Tensile loads up to 27,000N (M20 double-nut configuration)
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Cryogenic Stability: Tested for continuous operation at -196°C (LNG temperature)
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Corrosion Resistance: Chemically inert to most refrigerants and insulation materials
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Low Thermal Expansion: Coefficient of 4×10⁻⁶ 1/K prevents stress cracking
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EN 13501-1 Class E Fire Rating: Self-extinguishing phenolic resin matrix
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Custom Machining: Available in lengths up to 3000mm with standard or fine threads
Technical Data Tables
Laminated wood threaded rod Technical Data Sheet
|
Item |
Standard |
Unit |
PFWV202/KP20218 |
|
|
Denisty |
IEC61061 |
g/cm3 |
1.3 – 1.4 |
|
|
Oil absorption |
IEC61061 |
% |
/ |
|
|
ContinuousWorking Temperature |
– |
° C |
100 |
|
|
Temperaturelimit for drying process |
– |
° C |
130 |
|
|
Contaminationof dielectric liquids |
IEC61061 |
Δtg δ |
< 0.1 |
|
|
Flexural strength |
IEC61061 UNI EN ISO 178 |
MPa |
220 |
|
|
Modulus of elasticity in Gexure |
IEC61061 UNI EN ISO 178 |
GPa |
18 |
|
|
Compressive strength |
IEC61061 UNI EN ISO 604 |
MPa |
170 |
|
|
160 |
||||
|
Electric strength |
IEC 61061 IEC 60243 |
kV/mm |
/ |
7 |
|
F |
8 |
|||
|
O |
9 |
|||
|
Breakdown voltage |
IEC 61061 IEC 60243 |
kV/ 25mm |
> 80 |
|
|
Surface resistivity |
IEC 60093 |
Ω |
1011 |
|
|
Volume resistance |
IEC 60093 |
Ω cm |
1011 |
|
|
Dissipation factor |
IEC 60250 |
tg δ |
0.01 |
|
|
Relative permittivity |
IEC 60250 |
ε r |
4.2 |
|
Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.
Application Scenarios
1. LNG & Cryogenic Gas Processing
Ideal for anchoring cellular glass and PUR insulation on cryogenic piping (-162°C for LNG). Prevents cold bridges at pipe supports, tank bases, and vaporizer connections. Meets requirements of EN 1473 for LNG installations.
2. Cold Storage & Refrigeration Warehouses
Used in wall and ceiling insulation fastening systems for facilities operating at -40°C to 0°C. Provides structural support for insulated panels while maintaining thermal envelope integrity.
3. Industrial Refrigeration Systems
Secures insulation jackets on ammonia and CO₂ refrigeration piping. Resistant to refrigerant chemicals and maintains performance in high-moisture environments.
4. Building Thermal Breaks
Applied in balcony connections, roof penetrations, and facade supports to prevent condensation and heat loss in energy-efficient buildings. Complies with ASHRAE 90.1 thermal bridging requirements.
5. Low-Temperature Process Equipment
Supports insulation on ethylene oxide vessels, liquid nitrogen storage, and cryogenic transport containers. Withstands thermal cycling without degradation.
Testing Standards & Certifications
SIDA laminated wood hardware undergoes rigorous third-party testing:
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ASTM D143: Small clear specimen timber strength verification
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EN 1995-1-1: Eurocode 5 timber structure design compliance
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ASTM D2555: Clear wood mechanical property establishment
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ISO 16998: Structural wood-based panel testing protocols
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ASTM C177: Steady-state thermal transmission properties
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EN 13501-1: Reaction to fire classification (Class E)
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DNV GL-RP-0264: Recommended practice for LNG cargo containment systems
Quality Assurance: Each batch is traceable via lot number with available material certificates (3.1 EN 10204). Cryogenic testing reports available upon request.
Frequently Asked Questions
Q1: What is the maximum continuous operating temperature?
A: +80°C for continuous exposure. Short-term peaks up to +100°C are permissible. For higher temperatures, consider our GRP alternatives.
Q2: How do laminated wood rods compare to GRP in cryogenic service?
A: Laminated wood offers better impact resistance and lower cost, while GRP provides slightly lower thermal conductivity (0.30 vs 0.18 W/mK). Wood is preferred below -100°C due to superior ductility retention.
Q3: Are these rods suitable for outdoor applications?
A: Yes, when protected with UV-resistant coating. The phenolic resin provides excellent moisture resistance, but we recommend weatherproofing for extended UV exposure.
Q4: Can you supply custom lengths and diameters?
A: Absolutely. We machine rods up to 3000mm length and can produce M6-M30 diameters. Non-standard thread pitches available with 2-week lead time.
Q5: What is the expected service life?
A: >25 years in indoor cryogenic applications. Accelerated aging tests per ASTM D5510 indicate 85% strength retention after 30-year equivalent exposure.
Q6: Do you provide installation torque specifications?
A: Yes. Recommended torque values are 8-12 Nm for M8, 15-20 Nm for M10, 25-35 Nm for M12, 40-55 Nm for M16, and 60-80 Nm for M20. Over-tightening may cause thread stripping.
Q7: How does thermal expansion affect fastening?
A: With a CTE of 4×10⁻⁶/K (vs. 12×10⁻⁶/K for steel), thermal stress is significantly reduced. Our double-nut configuration accommodates differential expansion.
Q8: Are these products approved for use in the USA?
A: Yes. Materials are tested to ASTM standards and are accepted by major EPCs. ICC-ES evaluation report ESR-4567 is pending for 2025.
Installation Guidelines
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Pre-drilling: Drill holes 1-2mm oversize to accommodate expansion
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Torque Wrench: Always use calibrated torque tools to prevent over-stressing
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Thread Treatment: Apply graphite-based anti-seize compound for sub-zero service
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Alignment: Ensure perpendicular installation to maximize load distribution
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Inspection: Check for surface cracks before installation; reject rods with visible delamination
Storage: Keep in dry conditions at 15-25°C and <60% RH. Seal unopened packages maintain moisture content at 6-8%.