Premium Heavy-Duty Ductile Iron Square and Round Manhole Covers

Premium Heavy-Duty Ductile Iron Square and Round Manhole Covers. Customized Design Options: Shape, dimensions, color, and logos can be tailored to specific customer demands. Durable Cast Iron Material: Made of high-quality ductile iron (Grade 500-7) with excellent impact resistance. Wide Load Class Range: Available in classes A15 to F900 for pedestrian areas, highways, airports, and ports. Long Service Life: Anti-corrosion treatments ensure a service life exceeding 30 years. International Standard Compliance: Products meet EN 124, ASTM A536, and other international certification standards. Comprehensive Warranty: 1-year warranty covering non-human quality problems with replacement or compensation. OEM/ODM Service Available: Full customization support including designs, samples, and flexible customization options. Fast Production Lead Time: 15-25 days for standard orders and 25-35 days for customized orders.