Manhole Covers Ductile Iron Heavy Duty Round GGG50 DI

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China main port
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100 pc
Supply Capability:
20000 pc/month

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Item specifice:

Material: Ductile Iron Cross Sectional Shape: Round Thickness: 50-60mm

Product Description:

1.Ductile Iron Manhole Cover Description :
A manhole cover is a removable plate forming the lid over the opening of a manhole, to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.
Manhole covers are often made out of cast iron, concrete or a combination of the two. This makes them inexpensive, strong, and heavy, usually weighing more than 50 kilograms (110 lb). The weight helps to keep them in place when traffic passes over them, and makes it difficult for unauthorised people not having suitable tools to remove them.
2.Main Features of the Ductile Iron Manhole Cover:
1. High load capacity & resilience
Hardness is same as cast iron, while FRP manhole covers have overwhelming advantages on resilience recovery. They are designed to exceed A15/B125/C250/D400 load capacity, according to EN124: 1994.
2. Designed structure & pressure dispersion
Arc-shaped bottom structure allows the pressure they bear disperse averagely on the whole surface. Besides, the products are made not by SMC, it was put in several layers of fiber cloth to enhance the structures. So they are stronger than SMC composite manhole covers.
3. Consequences of temporarily overloading
Temporarily overloading may cause smash of concrete covers, seriously deformation, even slightly split. But this will not happen to FRP fiber cloth manhole cover.
4. Safety options
There is no metal contain, directly reducing potential accident or further maintenance costs caused by thieves. Anti-slip surface offer a safe road condition even in extreme weather.
5. Light weight
Compared with cast iron manhole cover, FRP manhole cover is 30% lighter.
Light weight allows more loading per vehicle, more convenient transportation and economical savings.
Allows a safer working condition, which single workers is enough for installation without risk of injury.
3.Manhole Cover Images:

Manhole Covers Ductile Iron Heavy Duty Round GGG50 DI

Manhole Covers Ductile Iron Heavy Duty Round GGG50 DI

4.Manhole Cover Specifications:

1) Production information
Manhole cover are manufactured for construction and public use. Manhole cover shall be smooth and free sand holes, blow holes, distortion or any other defects
2) Material 
A) Ductile iron GGG50
B) Grey iron GG20 
3) Designs
A) EN124 Class B125 C250 D400 F 900, with different size and grammage, or as  customers' requirement.
B) as per customers' drawing or samples

4) Process
A) Molding boards
B) Hand Casting
5) Coating
A) black bitumen or epoxy .
B)Coating as per customer's requirement
6) Different accessories are available
5.FAQ:
We have organized several common questions for our clients,may help you sincerely:
Q. Can I fit a square manhole cover into a round chamber?
A. Yes, there are a select few manhole covers which are square-to-round, meaning they will fit square or round chambers.

Q. I’ve measured my clear opening size but none of your covers match it, can you offer anything?
A. It’s likely that your cover is quite old and in imperial measurements which are no longer manufactured. However, we can offer bespoke solutions with manhole covers made to the specification you require.

Q. The project I’m working on requires a manhole cover with a quality finish, what’s available?
A. Naturally, galvanised steel of black polypropylene aren’t always ideal, and so we offer brass or stainless steel edging, as well as complete stainless steel covers.

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Q:How to maintain the hardware?
Should avoid faucets surface with a hard object collision. Faucet installation process, not forced installation, so as not to damage the leading parts.
Q:How do hardware stores feature?
Hello. You and I just opened a hardware store. This is my two do early I was doing. People's long time stable source.
Q:What do you do at a hardware store?
Hardware industry refers to the gold, silver, copper, iron, tin five metal materials, hardware is the mother of the industry; the basis of national defense, hardware products are usually divided into two major categories of hardware and hardware. Big hardware includes steel plate, steel, flat iron, steel bar, universal channel iron, I-iron and various types of hardware, building hardware, tin, lock nails, wire, steel wire, steel wire cutting, home hardware, tools etc.. On the nature and use of hardware, it should be divided into iron and steel materials, non-ferrous metal materials, machinery parts, transmission equipment, auxiliary tools, working tools, construction hardware, household hardware and other eight categories
Q:What kind of hardware installation is there in order of home decoration?
If the door (door and door): first hinge positioning (or repair groove), temporary installation - positioning lock, remove the lock - processing and installation after formal installation of the door, and installed in the positioning door -- etc.
Q:Does hardware affect the tightness of doors and windows?
Let me put it briefly.The main window is divided into windows, windows and wood windows and other types of.It is made of glass, section bar, hardware, sealing strip and so on. The sealing of doors and windows is made up of all parts, including the quality of the glass, the quality of the profiles, the quality of the sealant (mainly), the quality of the hardware, the quality of the doors and windows.The tightness is mainly related to the sealing strip they use. For example, the common casement window adopts three yuan ethylene propylene sealant strip, while the sliding window adopts the sealed top.
Q:How do you do the hardware business?
Looking for small, relatively low tech orders. Because the production capacity is limited, for large quantities of professional products, could not even pick up a line, and a large volume of orders relative profit is very low, for not being able to produce large amounts of labor of small and medium-sized enterprises is difficult to stand up, and a large volume of orders requires a large amount of capital turnover, for this small and medium-sized enterprises is also a big problem. Therefore, the establishment of enterprises in the development of the market to find more small quantities of relatively high profits of orders and buyers, more conducive to the growth of enterprises and the accumulation of raw funds.
Q:Some commonly used metal stamping parts of the material?
Hardware refers to gold, Au, silver, Ag, copper, Cu, iron, Fe, tin, Sn five metal materials, said, "hardware is the mother of the industry";
Q:How to distinguish the advantages and disadvantages of bathroom hardware?
Bathroom hardware coatingProducts: in strict accordance with the national standard electroplating technology, using imported raw copper, nickel, chromium and copper after, three plating process, depending on the sense of thick, shiny, long-term use will not wear, corrosion, foaming or peeling,. Compact structure, uniform coating, color face crisp, generally more than 30 micron in thickness, no scratch coating surface and burr.Liepin: plating layer is thin and uneven, loose structure, poor adhesion, luster, the chrome plated directly in the blank, after a period of time, the surface is easily corroded, wear, blistering and peeling off. The coating thickness is less than 20 microns, the material is easy to be oxidized by air, and the coating surface has many scratches and burrs.
Q:How to buy some ardware
Choose hardware accessories, depending on the material and workmanshipProfessionals said that the general hardware fittings mainly copper, aluminum alloy, stainless steel and iron four kinds of materials, the price is also very different. At present, home decoration is the most use of stainless steel hardware, but stainless steel materials exist impure, easy to print water stains and other shortcomings, and now many families began to use aluminum alloy parts
Q:What does building hardware include?
Architectural decoration hardware: Architectural hardware, decorative hardware (locks, handles), iron products, hardware fittings, hardware tools, hardware molds, hardware casting, etc.

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