Manufacturer of nodular cast iron ditch cover plate

Domestic manufacturers of nodular cast iron gutter cover plate include Jianhui nodular cast iron gutter cover plate factory, Chongqing nodular cast iron gutter cover plate factory, Huamai Foundry in Weizi Street of Changyi City and Shandong Liaocheng Jianhui Foundry Co., Ltd. ..

1, Jianhui ductile iron cover factory

This manufacturer's products are very tough. The impact value is close to that of medium carbon steel, which is more than 10 times that of gray cast iron. Strong corrosion resistance. The water spray corrosion test shows that the corrosion amount in 90 days is only 1/40 of steel pipe and110 of gray cast iron pipe. The service life is five times that of ordinary steel pipes.

Good plasticity. The elongation is ≥7%, which is similar to that of high carbon steel, and the elongation of gray cast iron is zero.

High strength. The tensile strength is ≥ 420mpa, and the yield strength is ≥ 300mpa, which is the same as that of low carbon steel and three times that of gray cast iron.

2. Chongqing Ductile Iron Cover Factory

The products of this factory have long service life, corrosion resistance, no pollution and maintenance-free, and can be used for more than 50 years. High bearing capacity, bearing capacity far exceeds other kinds of products, high bearing pressure, preventing safety accidents such as breaking and vehicle falling.

Anti-theft is a new anti-theft design using common anti-theft design. The manhole cover and well ring are connected by high-strength bolts, which is an integrated design. In addition, it has good safety, no jumping, jumping and shifting, no noise, safety and reliability.

3. Huamai Foundry in Weizi Street, Changyi City

Huamai Foundry in Weizi Street, Changyi City is located in Weifang, Shandong Province, a world-famous kite capital. The predecessor of the company is Changyi Huamai manhole cover foundry, where the foundry industry cluster logistics park gathers and the traffic is developed.

The company's main casting products are ductile iron manhole covers, municipal manhole covers, sewage manhole covers, rainwater manhole covers, five manhole covers, six manhole covers, anti-settlement manhole covers, invisible manhole covers, electric manhole covers, thermal manhole covers, manhole covers, rainwater grates, iron ditch cover plate, cast iron flower walls and so on. These products are made of thick materials.

4. Shandong Liaocheng Jianhui Foundry Co., Ltd.

Shandong Liaocheng Jianhui Foundry Co., Ltd. is a company specializing in drainage pipe cover plate, which belongs to environmental engineering accessories. Many cities are made of steel grating, which is often used in public or industrial buildings such as sanitation engineering, urban greening, industrial production and emission, and is widely used in road construction.

Mainly used for sewage discharge and ground support. Because of its strong waterproof and rust-proof ability, it basically does not need maintenance and replacement.

To judge the quality of nodular cast iron manhole cover, we should pay attention to the following points:

1, the quality of the manhole cover should be judged from the appearance of ductile iron manhole cover. There should be no obvious casting defects such as bubbles and collapse on the surface of the manhole cover, and the asphalt paint should be sprayed evenly with clear and beautiful lettering.

2. From the outside, from the appearance, there is no obvious casting defect, the surface pattern should be clear and the handwriting should be clear.

3. Check the flatness of cast iron manhole cover, and check the flatness of manhole cover with special fixture. We make a fixture with the diameter of the product we use and the depth of about 37 mm.

These dimensions are all formed by machining. When the manhole cover is put into the fixture, there should be no shaking and noise, the height of the manhole cover should not exceed the fixture, and the depth fit clearance should be between 3 mm ..

4. If you have the conditions to visit the production workshop of nodular cast iron manhole cover manufacturer, you should pay attention to the production equipment and operation process of manhole cover. Workers have high technical level and skilled process operation, and the quality of natural ductile iron manhole covers is good. In addition, the manufacturing process of the manhole cover can be divided into manual processing and mechanical processing, and the manhole cover manufactured by mechanical processing is more refined and beautiful, and the manhole cover has a higher fit with the well frame.