Description
SIDA’s FRP (Fiberglass Reinforced Polymer) threaded rods represent the next generation of structural fastening solutions. Engineered with high-quality E-glass fiber impregnated in epoxy, polyester, or vinyl ester resin matrices, these rods undergo precision pultrusion molding under high temperature and pressure to create a unified, full-thread structure with exceptional mechanical and chemical properties.
Our FRP threaded rods deliver twice the strength-to-weight ratio of traditional steel fasteners while eliminating critical failure points associated with corrosion, magnetic interference, and electrical conductivity. The unique manufacturing process ensures uniform thread geometry, optimized resin content (>95% on the surface), and superior load distribution across the entire rod length.
Key Performance Advantages
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Ultra-Lightweight Design: At only 1.6-2.1 g/cm³ density, our FRP rods weigh 75% less than steel equivalents, reducing installation labor costs and transportation expenses
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Exceptional Corrosion Resistance: impervious to acids, alkalis, salts, and moisture – ideal for harsh chemical and marine environments
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Complete Non-Magnetic Properties: Zero magnetic permeability prevents interference with sensitive electronic equipment and complies with non-sparking requirements
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Superior Electrical Insulation: Volume resistivity ≥1.0×10¹⁰ Ω·cm and dielectric strength up to 50kV for high-voltage applications
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Fire Safety Compliance: Flame retardant rating reaches V0 class with self-extinguishing properties (flaming ≤6s, afterglow ≤2s)
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Anti-Static Performance: Surface resistance 3×10⁷ Ω meets mining safety standards
Advanced Manufacturing Specifications
| Production Parameter | Specification |
|---|---|
| Manufacturing Process | Pultrusion winding with CNC precision machining |
| Production Speed | ≥1.5 meters per minute |
| Thread Accuracy | ±0.2mm tolerance |
| Resin Content | 65-75% (outer surface >95%) |
| Quality Control | 100% tensile sampling inspection |
| Continuous Operation | 24-hour uninterrupted production capability |
Technical Data Tables
Application Scenarios
1. Mining & Tunneling Support
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Primary Use: Rock bolting, roof support, rib stabilization
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Advantages: Anti-static properties prevent methane ignition, corrosion resistance in wet conditions, lightweight for manual installation
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Recommended Specs: MGSL20-MGSL27, length 1.8-3.0m
2. Chemical & Petrochemical Industries
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Primary Use: Equipment fastening, pipe supports, structural connections in corrosive environments
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Advantages: Resistant to H₂S, acids, alkalis, and saltwater; no galvanic corrosion
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Recommended Specs: Vinyl ester resin, diameters 12-24mm
3. Electrical & Power Systems
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Primary Use: Transformer mounting, reactor fastening, high-voltage converter valve connections
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Advantages: Dielectric strength up to 1000kV, H-class insulation (180°C), non-conductive
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Recommended Specs: Epoxy resin, diameters 8-20mm, lengths 0.5-2m
4. Coastal & Marine Structures
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Primary Use: Dock fender fastening, offshore platform repairs, seawater treatment equipment
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Advantages: Immune to saltwater corrosion, UV stabilized, no electrolysis
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Recommended Specs: Vinyl ester resin, sand-coated surface treatment
5. Transportation Infrastructure
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Primary Use: Bridge deck joints, railway signaling equipment mounts, airport lighting systems
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Advantages: Non-magnetic for signal integrity, vibration resistant, low thermal expansion
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Recommended Specs: MGSL18-MGSL24, epoxy resin
6. Clean Energy Facilities
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Primary Use: Wind turbine blade connections, solar panel mounts, fuel cell components
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Advantages: Non-magnetic properties critical for sensitive electronics, lightweight for tower top applications
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Recommended Specs: M12-M20, black UV-resistant coating
Testing Standards & Certifications
Quality Compliance
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ISO 9001:2015 – Quality Management System
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ISO 10406-1 – Test methods for FRP rockbolts
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IEC 61109 – Insulation specifications for electrical applications
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ASTM D7205 – Tensile testing of FRP bars
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GB/T 26743 – Chinese national standard for FRP anchors
Performance Testing Protocol
Every production batch undergoes:
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Mechanical Testing: 5% sampling for tensile, shear, and torsional validation
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Electrical Testing: 100% dielectric verification for insulation grade products
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Fire Testing: Random sampling per ASTM D635 for flame resistance
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Dimensional Inspection: Automated laser measurement of thread pitch and diameter
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Chemical Resistance: Quarterly immersion testing in pH 2-12 solutions
Material Traceability
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Raw material lot tracking from glass fiber to resin batches
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Digital production records with real-time monitoring
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Certificate of Conformance (COC) provided with each shipment
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Third-party testing available upon request (SGS, TÜV, Intertek)
FAQs
Q1: How does the strength of SIDA FRP threaded rods compare to steel bolts? A: Our FRP rods provide tensile strength of 600-650 MPa, comparable to Grade 5.8 steel bolts, but at only 25% of the weight. While they have lower absolute strength than high-grade alloy steel (e.g., 8.8 grade), their superior strength-to-weight ratio and corrosion resistance make them ideal for specific applications where weight andenvironmental durability are critical.
Q2: Can FRP threaded rods be used in structural load-bearing applications? A: Yes, when properly engineered. Our MGSL series is specifically designed for structural applications with documented load tables. However, FRP behaves differently from steel – it has linear elasticity until failure without plastic deformation. Always consult our engineering team for critical structural applications and follow local building codes.
Q3: What is the maximum service temperature for these rods? A: Standard epoxy resin rods: -50°C to +120°C. High-temperature H-class rods: up to +180°C continuous service. For temperatures above 180°C, we recommend our polyimide resin specialty products. Thermal expansion coefficient is approximately 9-12×10⁻⁶/°C (similar to concrete).
Q4: How do I cut and install FRP threaded rods? A: Use fine-tooth carbide blades (≥80 teeth) or diamond abrasive cutting wheels. Always wear respiratory protection. Standard steel nuts and washers are not recommended – use our matching GFRP nuts and plates for optimal load transfer. Torque values are 60-70% of equivalent steel bolts due to lower shear strength.
Q5: Are these rods resistant to UV degradation? A: Standard rods require UV protection for outdoor use. We offer UV-stabilized formulations with added surfacing veils and protective coatings. Black pigmented rods provide inherent UV resistance. For harsh outdoor applications, we recommend our sand-coated or VE (vinyl ester) exterior grade products with 15+ year warranty.
Q6: What is the typical lead time for custom orders? A: Standard diameters (12-32mm) in black epoxy: 7-10 working days. Custom colors/sizes: 15-20 working days. Large volume orders (>10,000m): 25-30 working days. Emergency stock available for mining customers with 48-hour dispatch.
Q7: Can I use standard steel nuts with FRP threaded rods? A: Not recommended. Steel nuts create stress concentrations and galvanic potential. Our matched GFRP nuts are engineered with complementary thread profiles and material properties to achieve rated load capacities. Using mismatched hardware voids warranty and reduces load capacity by 40-60%.
Q8: What is the shelf life of unused FRP threaded rods? A: When stored indoors away from direct sunlight and moisture: 10+ years for epoxy resin, 7-10 years for polyester resin. Temperature should remain below 30°C. Visual inspection recommended after 5 years – discard if surface crazing or fiber bloom is observed.
Q9: Do you provide installation training for mining applications? A: Yes. We offer on-site training programs covering proper drilling, resin anchoring, torque specifications, and quality control. Training materials comply with MSHA and international mining safety standards. Virtual training sessions available globally.
Q10: What is the minimum order quantity (MOQ)? A: Standard black rods: 100m per diameter. Custom colors: 500m per order. Custom diameters: 1000m MOQ. Sample orders (10-50m) available for first-time customers at standard pricing plus shipping.