Ductile Cast Iron Openable Rainwater Grate

Technical Features

1. Material & Process

Ductile Iron Substrate: Spheroidal graphite distribution via magnesium/rare-earth treatment, tensile strength ≥420 MPa, elongation ≥10%, outperforming gray cast iron in strength and impact resistance.
Surface Anti-Corrosion: Zinc spraying (≥80 μm) or epoxy coating, salt spray resistance ≥1,000 hours (ASTM B117), suitable for pH 5–10 soil and rainwater environments.
Openable Design: Hinged or snap-fit structure allows single-person operation (tools: T-wrench or dedicated handle) for quick debris removal and pipeline maintenance.

2. Structural Design

High-Efficiency Drainage: Rectangular or honeycomb perforations (open area ≥30%), drainage capacity ≥30 L/s·m², meeting stormwater demands.
Anti-Slip & Load-Bearing: Slip-resistant textures (friction coefficient ≥0.6), load ratings from C250 (25 tons) to D400 (40 tons) for pedestrian and vehicular zones.
Anti-Theft Optimization: Spring locks or bolted fixation requiring specialized tools reduce theft/vandalism by 80%.

Core Advantages

1. High Strength & Longevity

Compressive strength 400–600 MPa, withstands heavy vehicles (e.g., D400 grade: 40-ton load) without deformation.
Corrosion resistance ensures ≥30-year lifespan, 2–3× longer than composite grates.

2. Easy Maintenance & Efficient Drainage

Openable design enables rapid debris clearance (leaves, silt), reducing flooding risks and improving maintenance efficiency by 50%.
Optimized drainage structure boosts efficiency by 20–30% vs. traditional grates, tackling short-term heavy rainfall.

3. Safety & Sustainability

Slip-resistant patterns minimize fall risks in rain/snow; bar gaps ≤15 mm prevent small object drops.
100% recyclable ductile iron with 40% lower carbon emissions vs. cast steel, aligning with green city initiatives.

4. Cost Efficiency

Low lifecycle costs: No frequent replacements; maintenance costs reduced by 60% vs. composites.
Standardized sizes (e.g., 500×300 mm, 600×400 mm) ensure compatibility with existing drainage frames.

Key Applications

Urban Roads: Main roads, intersections (e.g., Beijing’s Chang’an Avenue: 50% drainage efficiency improvement during storms).

Public Facilities:

Parks/plazas (e.g., Shanghai Century Park: 70% fewer annual cleanups).
Underground garage entrances (anti-backflow design).

Special Environments:

Coastal saline-alkali zones (e.g., Qingdao’s Binhai Road: corrosion-resistant version remains rust-free after 10 years).
Arctic permafrost regions (e.g., Harbin Central Street: no cracking at -30°C).

Standards & Certifications

International: EN124 D400 (load capacity), ISO 1083 (material).

China:

CJ/T327-2010 (reclaimed water grates).
GB/T23858-2009 (manhole covers).

Certifications:

Anti-Corrosion: ISO 9227 salt spray test (2,000 hours).
Anti-Theft: GA/T73-2018 Class A.

Summary

The ductile iron openable rainwater grate redefines urban drainage systems through high-efficiency flow, modular maintenance, and extreme environmental adaptability. Key strengths:

1. Load & Clog Resistance: V-shaped drainage + quick-release design combats storms and debris.
2. Long-Term Economy: 20-year lifespan cuts municipal maintenance costs.
3. Smart Readiness: IoT compatibility drives digital sponge city management.
This product is a strategic choice for urban flood control and green infrastructure, particularly suited for high-traffic, high-maintenance public areas.

Technical Parameters