heavy duty ductile iron cover
Product Name Ductile Iron Manhole Cover
Brand Feilong Gaian
Material Ductile Iron
Actual Load Capacity 30KN–450KN
Load Capacity High load-bearing strength, suitable for heavy vehicles
National Standard Load Rating A15–D400
Application Scope Municipal roads, green belts, sidewalks, residential areas, parking lots, main roads, expressways, etc.
Heavy Duty Ductile Iron Cover - Superior Infrastructure Solutions
When you require solid, long-lasting get to arrangements for your framework ventures, our heavy duty ductile iron cover conveys unmatched execution. Made from premium Spheroidal Graphite Press (Review 500-7), these covers are built to handle extraordinary loads from 400kN to 900kN. Our progressed metallurgical prepare makes nodular graphite structures that give prevalent malleable quality and affect resistance compared to conventional cast press alternatives.

Product Overview
Our bendable press sewer vent covers speak to the gold standard in framework get to arrangements. Each cover experiences accuracy casting forms to guarantee reliable quality and execution. The surface alternatives incorporate plain wraps up, enhancing designs, or custom symbol integration to meet your particular tasteful prerequisites.
Key Applications
These robust covers excel in demanding environments including:
- Municipal roads and highways
- Urban sidewalks and pedestrian areas
- Commercial parking facilities
- Industrial complexes and ports
- Airport service areas
- Public utility access points (drainage, telecommunications, gas distribution)

Technical Specifications
| Round Manhole Covers | ||
|---|---|---|
| Size (mm) | Type | Load Capacity |
| Φ1000×1150 | Standard | B125 |
| Φ900×1050 | Standard | B125 |
| Φ800×900 | Standard | D400 |
| Φ700×900 | Standard | D400 |
| Φ700×800 | Standard | D400 |
| Φ600×700 | Standard | D400 |
| Φ500×600 | Standard | C250 |
| Φ400×500 | Standard | B125 |
| Φ750×900 | 5-Proof | D400 |
| Φ700×850 | 5-Proof | D400 |
| Φ700×890 | 5-Proof | D400 |
| Square Manhole Covers | ||
| Size (Width × Length, mm) | Load Capacity | |
| 1200×1200 | B125 | |
| 800×1200 | B125 | |
| 1000×1000 | C250 | |
| 800×1000 | B125 | |
| 500×1000 | B125 | |
| 800×800 | C250 | |
| 700×700 | D400 | |
| 600×600 | C250 | |
| 500×500 | C250 | |
| 400×400 | B125 | |
| 400×600 | B125 | |
| 300×500 | B125 |
Note: Due to continuous upgrading and optimization of product technology, there may be errors in product appearance and parameters. Please refer to the actual product.
Core Technical Properties
- Material: High-grade ductile iron with nodular graphite structure
- Load Range: 30KN–450KN actual capacity
- Standard Compliance: EN 124, AASHTO M306, AS 3996
- Tensile Strength: Minimum 500 MPa
- Yield Strength: Greater than 320 MPa
- Elongation: Over 7% for enhanced flexibility

Performance Advantages
Enhanced Safety Features
Our 5-proof design system addresses critical infrastructure challenges:
- Anti-settlement: Precision-machined seating prevents cover subsidence
- Anti-theft: Integrated locking mechanisms deter unauthorized removal
- Anti-noise: Polyethylene gaskets eliminate traffic-induced rattling
- Anti-displacement: Secure frame interface prevents lateral movement
- Anti-fall: Fail-safe design ensures cover integrity under extreme conditions
Superior Load-Bearing Capacity
The heavy duty ductile iron cover outperforms traditional materials through:
- Weight reduction of 30-40% compared to equivalent cast iron
- Elastic behavior under stress prevents catastrophic failure
- Resistance to fatigue from repeated loading cycles
- Optimal strength-to-weight ratio for improved handling safety
Corrosion Protection
Advanced coating systems ensure long-term durability:
- Bituminous paint provides excellent moisture resistance
- Fusion-bonded epoxy coating withstands chemical exposure
- Protective barriers against road salt and hydrogen sulfide

Why Choose FLA Industrial?
Customization Excellence
Our core strength lies in delivering tailored solutions. We specialize in custom-shaped covers that meet your unique specifications. From non-standard dimensions to special structural requirements, our engineering team develops precise Products" target="_blank" style="color:blue" >products for diverse industry applications.
Quality Assurance
All products meet international standards with comprehensive certifications:
- ISO quality management system certification
- CE product safety compliance
- Rigorous metallographic testing ensures 80%+ nodularity
- Load bearing verification per EN 124 protocols
Rapid Response Service
Experience industry-leading service standards:
- 24-48 hour response for pricing and technical queries
- 7-15 day delivery for customized products
- 2,000 tons inventory for immediate standard product availability
- Real-time production progress updates
Technical Support
Complete project assistance including:
- Custom mold development for special applications
- 3D design verification before production
- Product layout optimization
- Installation guidance and maintenance support
Frequently Asked Questions
Q: What makes bendable press predominant to dark press covers?
A: Pliable iron's nodular graphite structure gives versatile behavior beneath push, anticipating fragile disappointment whereas advertising the same stack capacity at altogether decreased weight.
Q: Which stack lesson ought to I select for mechanical applications?
A: For regions with overwhelming apparatus and stationary trucks, we suggest Lesson E600 (60 tons) or F900 (90 tons) evaluations to handle concentrated point loads safely.
Q: How do you avoid cover theft?
A: Our covers highlight advanced pivot and bolt-locking frameworks planned to avoid unauthorized get to whereas preventing robbery for scrap metal value.
Q: What disposes of activity commotion from covers?
A: We utilize precision-machined V-seating surfaces with coordinates PE or Neoprene gaskets that guarantee quiet, non-rocking execution beneath vehicle loads.
Q: What's the anticipated benefit life?
A: With legitimate establishment and defensive coating, our item regularly surpasses 30 a long time of benefit life in standard roadway situations.
Get Your Custom Solution Today
Contact Us today at sales@flaindustrial.com for detailed specifications, pricing, or technical consultation. Let FLA Industrial provide the heavy duty ductile iron cover solution that ensures your infrastructure performs.
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