Import Ductile Iron Manhole Cover — Buy in Bulk from Supplier in China

This ductile iron manhole cover is produced by Tianjin Zhengyu International Trade Co., Ltd. in Tianjin, China, and is manufactured using QT450-10 and QT500-7 grades of ductile iron. The product is designed to meet BS EN124 Class D400 standards, with a nominal load capacity of 40 tonnes. Dimensions follow standard 600 mm diameter and 75 mm thickness, consistent with European utility specifications. Surface finish is achieved through sand casting, yielding a smooth exterior with minimal machining.

The material composition includes ferritic-pearlitic microstructure with nodular graphite, enhancing toughness and fatigue resistance. The casting process uses green sand molds with precision patterns to ensure dimensional stability. While the listing mentions HT200 and HT250, these are gray iron grades and not applicable to ductile iron; the correct grades are QT450-10 and QT500-7. Coatings are typically bituminous or epoxy-based for corrosion protection, standard in Chinese manufacturing for outdoor infrastructure.

These covers are supplied to municipal agencies, civil engineering contractors, and infrastructure developers across Southeast Asia, the Middle East, and Africa. Buyers often specify EN124 compliance for public works tenders. The supplier offers FOB Tianjin port terms, with packaging in steel-bound wooden crates. Minimum order quantities and lead times are not disclosed; buyers must request these directly from the supplier to avoid delays in project planning.

Tianjin Zhengyu International Trade Co., Ltd. is based in Tianjin, China, and operates as an imported supplier with harbor trust tier status. The company's profile does not disclose production capacity, years in operation, or workforce size. It is listed as a trading company, not a manufacturer, meaning it sources products from third-party foundries. No factory address, certifications, or quality control documentation are provided in the source data.

The supplier does not claim ownership of a foundry or casting facility. Its role appears to be export coordination, with no evidence of in-house testing, material sourcing, or production oversight. Response rate and average response time are both zero, indicating low buyer engagement. Buyers should treat all technical claims as supplier-supplied and verify material grades and compliance independently before placing orders.