



Product Applications
1. Types and uses
There are many types of cast iron manhole covers, which can be divided into many types according to their uses and specifications, such as road manhole covers, community manhole covers, park square manhole covers, etc. These manhole covers are used to cover various facilities under the road (such as drainage, communications, etc.), various facilities in the community (such as green irrigation, fire protection facilities, etc.), and facilities in public places such as parks and squares.
2. Features and advantages
High load-bearing capacity: cast iron manhole covers have a high load-bearing capacity and can withstand the weight of vehicles and pedestrians to ensure the normal operation of urban infrastructure.
Strong durability: cast iron manhole covers have strong durability and long service life, and can be used for a long time under harsh weather and environmental conditions.
Good anti-slip performance: the surface of the manhole cover is usually provided with anti-slip patterns or patterns to increase friction and prevent pedestrians from slipping due to rain, snow, and ice.
Not easy to deform: cast iron materials have good rigidity and toughness, making the manhole cover less likely to deform during use.
Beautiful appearance: the appearance design of the cast iron manhole cover is beautiful and generous, which can be coordinated with the surrounding environment and enhance the image of the city.
Strong anti-theft performance: Some cast iron manhole covers adopt anti-theft design, such as special anti-theft mechanism, high-strength bolt connection, etc., which effectively prevents the manhole cover from being stolen.
Manufacturing process
The manufacturing process of cast iron manhole covers is mainly achieved through casting process, including determining the size and specifications of the manhole cover, selecting suitable cast iron materials (such as gray cast iron, ductile iron, etc.), designing molds, batching and smelting, pouring, cooling, deburring, processing and grinding, and quality inspection. During the smelting process, impurities and gases in the melt need to be removed to ensure the quality of the casting. During pouring, the pouring temperature and speed need to be controlled to avoid defects such as pores and slag inclusions.
Application scenarios
Cast iron manhole covers are widely used in the closure of drainage, communication, power and other facilities in public places such as urban roads, squares, and sidewalks. It can ensure the normal operation of urban infrastructure, prevent accidents, and improve the safety and comfort of the city.
In summary, cast iron manhole covers play an important role in urban construction with their high load-bearing capacity, strong durability, good anti-slip performance, and non-deformation characteristics and advantages. At the same time, its beautiful appearance design and strong anti-theft performance also further enhance the image of the city and the safety of public property.




Qingdao Xinquanxi Metal Products Co..Ltd. was established in 2001 (formerly known as Qingdao Quanxi Hardware Cable Co., LTD.), located in Jimo District, Qingdao city, the company was mainly engaged in the production and sales of Japanese open-body turnbuckle, die forging shackles, products are mainly sold to the United States, Russia, Japan and other countries.
In September 2019, with the continuous development of the company's business, it merged with Qingdao Ruihongjie Industry and Trade Co., LTD., and changed the company name to Qingdao Xinquanxi Metal Products Co., LTD. At the same time, the business range is gradually expanding, the main production and operation of hardware rigging, wire rope connecting parts, hardware machinery, Marine and automobile connecting parts, all kinds of forging, sheet metal, stamping, casting parts and other products. After more than 20 years of development, we have established a complete system, with strong technical capacity, mature production methods, advanced production equipment and testing methods.
We always adhere to the principle of quality first, safe production, timely delivery, customer satisfaction after sale service, and constantly research and learn product expertise, with the best quality products to serve customers.


1.Are you a factory or a trading company?
We have our own foundry and forging factory. The forging plant has 4 production lines and a history of more than 20 years;Foundry has a history of more than 30 years.
2.How do you control your quality?
1: Control during r&d at the beginning of production
2:Production process control
3:Dimensional control
4:Tensile tests
5:Quality inspection before delivery
3.Can we have our product markings on it?
Yes, we can add product markings according to your requirements.
4.How about packing?
Woven bag, carton, plywood pallet or by customer requirements.