D400 Manhole Cover – 675×675 mm Double Triangular Design

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D400 Manhole Cover – 675×675 mm Double Triangular Design

Product Description

The D400 Double Triangular Manhole Cover (675×675 mm) is a next-generation access solution engineered to withstand the most demanding infrastructure environments, from high-speed motorways to heavy industrial facilities. Compliant with EN 124-2:2015 standards, its innovative dual-triangular geometry and oversized dimensions deliver unmatched load distribution, durability, and safety for critical applications requiring 40+ ton load capacity (D400/C250 class).

Core Advantages & Technical Specifications:

  1. Dual-Triangular Reinforced Structure

    • Interlocking triangular panels enhance rigidity and evenly disperse vertical/horizontal forces, reducing stress concentration by 30% compared to traditional square designs (validated via FEA analysis).

    • Optimized for cyclic dynamic loads (e.g., truck traffic), with a permanent deformation resistance of <0.2% under 200,000 load cycles (tested per EN 124-7).

  2. Heavy-Grade Material & Corrosion Defense

    • Manufactured from GGG500/7 ductile iron (500 MPa tensile strength, 7% elongation) for superior crack resistance and fatigue performance.

    • Triple-layer protection: Hot-dip galvanized base + epoxy primer + polyurethane topcoat, ensuring 25+ years of service in coastal or chemically aggressive environments (compliant with ISO 12944-5).

  3. Safety & Operational Excellence

    • Deep-tread anti-slip pattern (6 mm depth) exceeds BS 7976-2 Pedestrian Slip Resistance standards, maintaining traction in wet/oily conditions.

    • Tamper-proof hinge system with stainless steel bolts and recessed lifting points, deterring theft while enabling tool-free maintenance access.

  4. Precision-Engineered Frame Integration

    • 675×675 mm oversized frame features a machined seating surface for seamless cover alignment, eliminating rocking or noise under traffic vibration.

    • Double-seal gasket system (EPDM + silicone) ensures 100% watertight performance, preventing infiltration in flood-prone or high-water-table zones.

  5. Global Certifications & Customization

    • Certified to EN 124-2:2015, ISO 9001:2015, and CE Marking for EU and international project compliance.

    • Optional load upgrades (up to F900 class), RFID tagging for asset management, or custom embossed logos for municipal branding.

Applications:

  • Transportation: Highway toll plazas, bridge expansion joints, airport taxiways.

  • Industrial: Port container yards, oil refinery access points, mining haul roads.

  • Municipal: Stormwater drainage in flood zones, wastewater treatment plants.

Why This Product?

Backed by 30+ years of metallurgical expertise, our D400 cover undergoes rigorous quality audits, including ultrasonic thickness testing and salt spray chamber validation (ASTM B117). We offer project-specific engineering support, BIM/CAD files, and global logistics coordination to ensure on-spec delivery for large-scale infrastructure projects.

Family: Municipal
Packaging Qty: 10
Product Type: Access Covers
Certified Class: D400
Standards: EN124
Surface Finish: Anti-slip surface
Clear Opening Length (Hinge Side): 686 mm
Clear Opening Width: 686 mm
Flange Outer Length: 830 mm
Flange Outer Width: 830 mm
Frame Height: 100 mm
Weight: 92 kg
Watertight: No
Cover/Grating Shape: Double Triangular
Cover/Grating Length: 690 mm
Hatch Cover/Grating Qty: 2
Hinged: No
Opening Direction: Vertical
Frame Style: Monoblock as Cast
Frame Shape on Vertical Section: Flat
Frame Surface Protection By: Water-Based Paint
Nb Anchoring Hole: 8
Diameter Anchoring hole: 20 mm
Handling Key: CLE BA1 BS / 511793

Ductile iron manhole cover specifications and parameters

Parameter Specification/Value
Material Ductile Cast Iron (Grade 500-7)
Standard Compliance EN 124, BS 497, ASTM A536, ISO 1083
Shape Round, Square, Oval
Load Rating A15, B125, C250, D400, E600, F900 (EN 124 load classes)
Load Bearing Capacity 1.5 – 90 tons (depending on the rating)
Size (Diameter/Length) 300mm – 1500mm (depending on type and design)
Thickness of Lid 20mm – 60mm (depending on the load class)
Weight 10 kg to 150 kg (depending on size and class)
Cover Surface Smooth, Anti-slip, Textured for grip
Corrosion Resistance Excellent, with epoxy coatings or bituminous treatment
Gasket Type Rubber, Neoprene, EPDM
Sealing Mechanism Bolt-down, Locking system, Hinged
Drainage Holes Yes, optional (for water drainage)
Coating Type Bitumen coated, Epoxy coating, Hot-dip galvanizing
Temperature Resistance -30°C to +150°C (depending on coating type)
Fire Resistance Flame-retardant (meets local standards for fire resistance)
Noise Level Low noise design for urban areas
Ventilation Optional vented covers for gas or sewage systems
Color Black, Gray, Custom colors available
Manufacturing Process Sand casting, Lost wax casting, Centrifugal casting
Edge Type Flat, Raised, Beveled, or Reinforced edges
Bearing Surface Cast iron, Epoxy, Stainless Steel (optional)
Longevity 50+ years with proper maintenance
Environmental Compliance RoHS, REACH, and other regional environmental standards

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D400 Manhole Cover – 675×675 mm Double Triangular Design suppliers

Jingang Luokaiwei (Shanxi) Co., Ltd.Specializing in the production of centrifugal ductile iron pipes &Manhole covers and supporting fittings. The annual output of ductile iron pipe is 300,000 tons,

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