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Manhole Cover

Specification

A	B	C	E	F
Cover Diameter	Cover Thickness	Clear Opening	Flange OD	Frame Height
13-1/4	1-1/2	11-1/2	17-5/8	4
21-7/8	1-1/2	20-1/4	26-5/8	4
22-3/4	1-1/2	20	25	2-3/4
22-3/4	1-1/2	21	32	4
22-3/4	1-3/4	21	34	7
22-3/4	1-1/2	21	35	7
24	1-3/16	22	34	7
24	1-3/16	22	30	4
25-1/4	1-1/2	23-1/2	29-1/2	4
26	1-1/2	24	36	4
26	1-1/2	24	36	7
28	1	25	38	8
31-15/16	1-3/8	30	46	5-5/8
31-15/16	1-3/8	30	46	10
31-3/4	1-3/8	30	38	4
34	1-1/2	32-1/4	38-1/2	4-1/8
38	2	36	46	6
50-1/4	2	48	56-1/2	6

Customization Process

Communication Needs: Culturally and creatively designed manhole covers can be customized based on the cultural themes and distinctive features of specific scenic areas. Please provide your customization concepts and detailed specifications for further discussion.

Production Execution: Following the confirmed design, we implement meticulous production processes with strict quality control at every stage, ensuring consistency and precision before proceeding to mass production.

Quality Inspection and Packaging: Upon completion of the product, a comprehensive three-stage inspection process is conducted to ensure quality standards are met. Subsequently, the products are packaged in accordance with your specified requirements.

Delivery Assurance: We ensure timely delivery of the products within the agreed timeframe as per the contract terms.

Types of Manhole Cover

The manhole cover produced by our company mainly include the following types:

Round Ductile Iron Manhole Cover

This is the most common shape. The diameter of the round manhole cover is equal. No matter how it is placed, its diameter remains unchanged and will not fall from the wellhead. It can cover the wellhead well and is suitable for various pipeline wellheads, such as sewage wells, rainwater wells, cable wells, etc.

Ductile Iron Trench Cover

In the water spray corrosion test, the corrosion amount in 90 days is only 1/40 of the steel pipe and 1/10 of the gray iron pipe. The service life is 2 times that of the gray iron pipe and 5 times that of ordinary steel pipe.

Ductile Iron Cultural And Creative Manhole Cover

In historical and cultural cities, ancient towns and streets, scenic spots and other tourist attractions, cultural and creative manhole covers can be designed according to the cultural themes and characteristics of the scenic spots.

Benefits of Manhole Cover

Durability Beyond Measure

One of the primary advantages of ductile iron manhole covers lies in their inherent strength and durability. Unlike traditional cast iron, ductile iron is more flexible and resilient, making it less prone to cracking or breaking under heavy loads. The material's resistance to corrosion ensures a prolonged lifespan, even in challenging environmental conditions.

Load-Bearing Capacity

Another advantages Ductile iron manhole covers is an impressive load-bearing capacity, making them suitable for deployment in high-traffic areas and industrial zones. These covers can withstand heavy loads without compromising their structural integrity, providing a reliable solution for areas with constant vehicular movement.

Safety Features

Safety is a paramount consideration in urban planning, and ductile iron manhole covers address this concern effectively. Ductile iron manhole covers are engineered with anti-slip properties, a crucial element in ensuring safe passage for pedestrians and vehicles. The surfaces of these covers are designed to provide optimal traction, even in adverse weather conditions such as rain or snow. This advantages of Ductile iron manhole covers significantly reduces the risk of accidents caused by slipping, making them particularly effective in areas with high foot traffic.

Resilience in Varied Environments

Ductile iron manhole covers stand as resilient guardians in the diverse and dynamic environments of urban landscapes. Their remarkable adaptability and robust characteristics make them indispensable in facing the challenges posed by various conditions, ensuring the steadfast functionality of essential infrastructure beneath our feet.

Environmental Impact

Environmental considerations are increasingly important in infrastructure decisions. Ductile iron manhole covers contribute to eco-friendliness due to their recyclability and sustainability factors. The ability to recycle the material reduces the demand for new resources, aligning with the principles of a circular economy.

Application of Round Ductile Iron Manhole Cover

Urban Infrastructure:
Ductile iron manhole covers are commonly used in urban infrastructure projects as they allow easy access for inspections and maintenance to sewage systems, water mains, stormwater drainage and telecom networks.

Roads and Highways:
Ductile iron covers are the preferred choice as they provide the ability to withstand heavy traffic loads and resist deformation. They are reliable and provide ultimate safety on roadways.

Airports and Ports

In airports, ductile iron manhole covers are needed to access the utility systems for runway lighting, navigation aids, fuel pipelines, and drainage systems. Their strength and durability make them the obvious choice for heavy-duty applications in these extreme settings.

Industrial Facilities

Ductile iron manhole covers are used in industrial settings such as manufacturing plants, chemical processing plants and refineries. They provide easy access to underground utilities like storing tanks and equipment kits.

Commercial and Residential Developments

In commercial and residential developments, ductile iron manhole covers are installed for easy access to utility lines such as water pipes, sewage, and electrical networks. They ensure reliable access for maintenance or repairs, whilst also maintaining an aesthetic appeal in urban environments.

Shipping

We offer various shipping methods, including sea freight, air freight, and express delivery, depending on the order size and destination.

Shipping costs will be calculated based on the destination and weight of the package.

Customers will receive a tracking number once the package has been shipped, so they can track the status of their delivery.

We strive to ship all orders within 2 business days of receiving the payment.

In case of any delays or issues with shipping, our customer service team will promptly communicate with the customer to resolve the problem.

With our careful packaging and efficient shipping methods, you can trust that your products will arrive in perfect condition and on time.

Certificate

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FAQ

Q: How long do manhole covers last?

A: Manhole covers, typically constructed from durable materials such as cast iron or composites, can last for an extended period, often ranging from 30 to 50 years or more. The exact lifespan May vary depending on factors such as traffic intensity, the type of material used, and maintenance practices.

Q: Should manhole covers be airtight?

A: Airtight manhole covers are characterized by a single tongue-and-groove joint that creates a sealed connection between the cover and frame. This design helps prevent the escape of foul odors and the ingress of water into the manhole system.

Q: What is the difference between a sewer cover and a manhole cover?

A: Sewer cover: These are manhole covers placed over sewer utility systems, often marked with the word "sewer" to indicate their function.
Drain cover / drain grate cover: These covers feature perforations that allow water to drain into sewer or stormwater systems.

Q: Why don't manhole covers freeze?

A: Have you ever noticed that manhole covers rarely freeze during winter? This phenomenon occurs because the flow of heated wastewater beneath the streets keeps the covers warm. Similar to how domestic activities such as showers, baths, and laundry contribute to the warmth of wastewater.

Q: How much weight can a manhole cover handle?

A: Manhole covers are classified according to their load-bearing capacity, which varies based on intended usage and traffic conditions. Generally, they range from class a15 (suitable for light pedestrian traffic) to class f900 (designed for very heavy industrial vehicles). For instance, class b125 covers can support up to 12.5 tonnes, making them suitable for residential driveways, while class d400 covers can withstand loads of up to 40 tonnes, commonly found on roads and highways.

As one of the leading manhole cover manufacturers and suppliers in China, we warmly welcome you to wholesale bulk customized manhole cover from our factory. Contact us for more discount information.

Ductile Iron Trench Cover, Ductile Iron Cultural and Creative Manhole Cover, Round Ductile Iron Manhole Cover