PRODUCT
SMC Manhole Cover
Premium Sheet Molding Compound Composite Access Covers Engineered for Infrastructure Excellence
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SMC Manhole Cover — Complete Guide Product
D400 Rated for Road Applications
Factory QC Testing
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Product Overview
Sheet Molding Compound Composite Access Solutions
Our SMC (Sheet Molding Compound) manhole covers are manufactured using advanced compression molding technology to produce high-strength, lightweight composite access covers that outperform traditional cast iron alternatives. The SMC material consists of unsaturated polyester resin reinforced with chopped glass fibers, mineral fillers, and specialized additives, creating a thermoset composite with exceptional mechanical properties.
Each cover is precision-molded under controlled heat and pressure in hydraulic presses ranging from 100 to 300 tons, ensuring consistent fiber distribution, dimensional accuracy, and void-free construction. The result is a manhole cover that delivers EN124-certified load performance from Class A15 (pedestrian) through Class F900 (airport-grade), while weighing 60-70% less than cast iron equivalents.
Available in round and square configurations ranging from 300 mm to 1200 mm, our SMC manhole covers serve utilities, telecommunications, drainage, electrical, and infrastructure applications worldwide. The combination of corrosion resistance, electrical insulation, anti-theft design, and low maintenance makes SMC the preferred material choice for modern infrastructure projects seeking long-term value and reliability.
Specifications
Ficha Técnica
Specifications Diagram
Dimensions
Please refer to the dimensional drawing for detailed measurements and installation clearances.
| Parameter | Value |
|---|---|
| Material | SMC (Sheet Molding Compound) — Glass fiber reinforced thermoset polyester |
| Load Rating Range | EN124 A15 (15 kN) to F900 (900 kN) |
| Standard Sizes (Round) | 300 mm, 450 mm, 500 mm, 600 mm, 700 mm, 800 mm, 900 mm |
| Standard Sizes (Square) | 300x300, 450x450, 600x600, 750x750, 900x900 mm |
| Weight (600x600 D400) | 18 kg (vs 62 kg cast iron) |
| Glass Fiber Content | 20-30% by weight |
| Surface Treatment | Anti-slip diamond pattern, UV stabilized |
| Operating Temperature | -50°C to +150°C |
Features
Características y Ventajas
Key Features Overview
Ultra-Lightweight Design
SMC manhole covers weigh 60-70% less than cast iron equivalents. A 600x600 mm D400 SMC cover weighs only 18 kg compared to 62 kg for cast iron, enabling one-person installation without mechanical lifting equipment.
Superior Corrosion Resistance
The thermoset SMC material is completely impervious to rust, electrochemical corrosion, sewer gases (H2S), road salts, chemical spills, and saltwater. No painting, coating, or rust treatment is ever required.
EN124 Certified Load Performance
Covers are independently tested and certified to meet EN124 load standards from A15 (pedestrian) through F900 (airport runways). Test certificates from accredited laboratories are available.
Electrical Insulation Safety
SMC is electrically non-conductive, eliminating ground potential rise (GPR) hazards in electrical substations, railway signaling pits, and telecom chamber applications where electrical isolation is critical.
Theft-Proof Construction
Zero scrap metal value eliminates theft incentive that plagues cast iron covers. Optional tamper-proof locking systems, key-operated mechanisms, and hinged designs provide additional security.
Low Total Cost of Ownership
Lower purchase price, reduced shipping costs (2x more units per container), faster installation, zero maintenance, and no replacement due to theft deliver 50-60% lower lifecycle cost versus cast iron.
Applications
Where It's Installed
FRP Manhole Cover D400 Standard — Complete Guide to EN124 Compliance, Load Ratin
D400 rated SMC covers for heavy traffic roads, city streets, and national highway networks
SMC Manhole Cover Sizes — Standard Dimensions & Selection Guide
Non-conductive SMC covers for substations, transformer vaults, and telecom access chambers
Manhole Cover Load Ratings EN124
F900/E600 rated covers for runways, tarmacs, cargo terminals, and coastal infrastructure
SMC Manhole Cover vs FRP — Complete Comparison Guide
Lightweight covers suitable for commercial buildings, residential communities, and landscape areas.
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