Import Casting Manhole Cover — Buy in Bulk from Supplier in China

Casting manhole covers supplied by Hunan Assn International Trade Co., Ltd. are manufactured from ductile iron or gray iron, designed for heavy-duty urban infrastructure use. These covers typically meet load classes D400 or C250 per EN 124 standards, with diameters ranging from 600 mm to 800 mm and thicknesses between 45 mm and 70 mm depending on size. The surface is finished with anti-slip patterns to ensure pedestrian safety, and the covers are engineered to withstand dynamic loads from commercial vehicles and public transit systems.

The material composition follows standard iron casting practices, with carbon content between 3.0% and 3.8% and silicon levels of 1.8% to 2.8%. Corrosion resistance is achieved through internal alloying and optional bituminous coating, not plating. These covers are not galvanized or painted; surface protection relies on the inherent properties of the iron matrix and environmental exposure. Variants include dual-lid designs for utility access and recessed edge profiles to reduce lifting hazards during maintenance.

These manhole covers are primarily purchased by municipal road authorities, civil engineering contractors, and utility operators in regions with high traffic density. Buyers typically order in batches of 10 to 100 units, packed in wooden crates or steel pallets with protective corner guards. Delivery terms are commonly FOB Changsha Port or CIF destination port, with lead times averaging 25 to 35 days after deposit. Inspection reports for material composition and load testing are available upon request.

Hunan Assn International Trade Co., Ltd. operates from Changsha, Hunan Province, and specializes in exporting cast iron infrastructure components. The company is registered as a trading entity with export licenses and holds a harbor trust tier, indicating verified export history. It does not manufacture the covers itself but sources from certified foundries in Hunan and Hubei. The supplier's profile confirms no direct production facility, and no information is provided regarding workforce size, annual turnover, or client names.

The company responds to inquiries with standard templates and has no recorded response rate or average response time. It does not list certifications such as ISO 9001 or CE on its profile, and no factory audit reports are referenced. Buyers should request material test certificates and load test reports directly for each order. The supplier's role is limited to coordination, export documentation, and logistics arrangement.