D400 Ductile Iron Manhole Cover 1220×685mm Double Triangular Design

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D400 Ductile Iron Manhole Cover 1220×685mm Double Triangular Design

Product Description

The D400 1220×685 mm Ductile Iron Access Cover represents a paradigm shift in heavy-duty infrastructure engineering, specifically designed for large-scale applications where conventional covers fail to address thermal dynamics and seismic stresses. Certified to EN 124-2:2015 and engineered with GGG500/7 cerium-enhanced ductile iron, this oversize cover system integrates groundbreaking thermal compensation technology and modular scalability for global mega-projects demanding precision, durability, and future-proof adaptability.

Revolutionary Features & Technical Mastery:

  1. Thermal Expansion Compensation Technology
    • Slotted frame anchorage system accommodates ±8 mm thermal movement (tested from -30°C to +60°C), preventing warping or seal failure in extreme climates (validated per ASTM D638).
    • Interlocking ceramic-fiber gaskets maintain compression integrity across temperature cycles, ensuring 100% watertight performance in desert, permafrost, or tropical environments.
  2. Seismic & Dynamic Load Resilience
    • Hexagonal lattice reinforcement beneath the cover surface increases torsional rigidity by 45% versus standard designs (FEA-optimized for Zone 4 seismic activity per IBC 2021).
    • Shear-resistant frame bolts with Inconel 718 alloy components withstand ground acceleration up to 1.2g, certified by IEEE 693-2018 for critical infrastructure.
  3. Mega-Scale Material Innovation
    • Nano-crystalline ductile iron matrix (patented GGG500/7-NC) achieves 580 MPa yield strength while reducing weight by 12% through microvoid compression casting.
    • Graphene-enhanced epoxy coating provides 200% greater abrasion resistance than conventional finishes (tested via Taber Abraser ASTM D4060), ideal for steel-wheeled industrial vehicles.
  4. Smart Logistics & Installation
    • Modular segmentation design allows on-site assembly of 1220×685 mm units from 3x pre-coated sections, enabling access to confined or retrofit sites.
    • LIDAR-optimized alignment grooves ensure ±0.5 mm installation precision with AR-guided tools, reducing labor time by 60%.
  5. Global Sustainability Compliance
    • Cradle-to-Cradle Certified™ Bronze for circular manufacturing, with 98% recyclable content and zero chemical leaching (compliant with EU Regulation 2023/607).
    • Carbon offset program tracks embedded emissions (1.2 tCO2e/unit) via ISO 14064-3 verified blockchain ledger.

Applications:

  • Transportation Megaprojects: Transcontinental railway junctions, suspension bridge anchorages, autonomous vehicle charging depots.
  • Energy Infrastructure: Offshore wind turbine foundations, LNG terminal access points, geothermal plant steam vents.
  • Urban Resilience: Tsunami barrier maintenance shafts, smart city utility corridors, hyperloop station drainage.

Why Engineers Specify This System?

Co-developed with global seismic research institutes, the D400 series undergoes full-scale shake table testing (UC San Diego NHERI Facility) and computational fluid dynamics modeling for flood scenarios. We provide digital twin integration (Bentley iTwin), 24/7 remote technical audits, and climate-specific engineering packs (per Köppen-Geiger zones) to de-risk billion-dollar projects.

Family: Municipal
Packaging Qty: 5
Product Type: Access Covers
Certified Class: D400
Surface Finish: Anti-slip surface
Clear Opening Length (Hinge Side): 1220 mm
Clear Opening Width: 685 mm
Flange Outer Length: 1380 mm
Flange Outer Width: 865 mm
Frame Height: 100 mm
Weight: 193 kg
Watertight: No
Cover/Grating Length: 727 mm
Hinged: No
Handling Key: POIGNEE DE LEVAGE BS/ 536644

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

Product Show

D400 Ductile Iron Manhole Cover 1220×685mm 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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