700x800 Round rainwater ductile iron manhole cover

700x800 Round Rainwater ductile iron manhole cover – d400 Heavy Duty Type

Product Description
Our 700x800 Round Rainwater Ductile Iron Manhole Cover is one of the most reliable heavy duty manhole covers in the market, designed to meet d400 manhole cover standards. This durable manhole cover and frame set ensures excellent load-bearing capacity, corrosion resistance, and long-lasting performance in demanding urban drainage environments. Each Manhole Cover is precision-cast from high-grade ductile iron, providing both superior strength and exceptional stability under heavy traffic conditions.

Key Features

• High Strength Material: Manufactured from EN-GJS-500-7 ductile iron, offering enhanced tensile strength and impact resistance compared to traditional cast iron covers.

• Load Class D400: Suitable for areas subjected to heavy traffic such as highways, industrial roads, and city streets.

• Precision Fit Frame: The tight-fitting manhole cover and frame design prevents vibration and noise while ensuring stability.

• Anti-Slip Surface: The textured top surface enhances safety by providing strong grip in wet or rainy conditions.

• Corrosion Resistant Coating: Black bitumen or epoxy coating for superior rust protection and long service life.

• Easy Installation & Maintenance: Hinged or detachable design available for quick access to underground systems.

Product Specifications

• Product Name: 700x800 Round Rainwater Ductile Iron Manhole Cover

• Shape: Round

• Material: Ductile Iron (EN-GJS-500-7)

• Clear Opening: 700x800 mm

• Load Capacity: D400 (up to 40 tons)

• Surface Treatment: Black bitumen / epoxy coating

• Locking System: Optional bolt or key locking

• Application: Urban drainage, highways, water networks, industrial zones

Applications
This D400 manhole cover is ideal for installation in heavy-load environments such as:

• City roads and highways

• Rainwater drainage systems

• Industrial parks and logistics centers

• Sewage and water treatment facilities

Why Choose Us
Chongzhou Hongxinwei Metal Manufacturing Co., Ltd. specializes in producing high-quality ductile iron manhole covers and frames. With over 30 years of foundry experience, we ensure every product meets international standards for performance, safety, and durability. We also provide OEM and customization services for logo design, pattern layout, and dimensions.