Manhole Cover Square Base with Round on Sale

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
1000 m.t.
Supply Capability:
100000 m.t./month

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Item specifice:

Material: Ductile Iron Standard: Round Power Supply: AC Power
Customized: Customized Surface Treatment: Zinc Plated

Product Description:

1.Cast Iron Manhole Cover Description :

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.

A manhole cover sits on metal base, with a smaller inset rim which fits the cover. The base and cover are sometimes called "castings", because they are usually made by a casting process, typically sand-casting techniques.

2.Main Features of the Ductile Iron Manhole Cover:

•High endurance
•High Strength
•Pressure Resistence
•Anti-corrosion
•Anti-theft
•Good visual effect
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.
3.Manhole Cover Images:

 Manhole Cover Square Base with Round on Sale

Manhole Cover Square Base with Round on Sale

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) Coating
A) black bitumen or epoxy .
B)Coating as per customer's requirement

4) Different accessories are available 

5) Packing:
Wooden case or wood pallet, or as per customers' requirement 

6)  Payment terms: T/T or L/C 

5.FAQ: 

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:What is the reason why the rubber washer is small after use?
Rubber elastic loss (compression permanent deformation large), the rubber will lose the value of the work. If the dynamic load is the damping effect is poor!!! The specific design of rubber products can contact, contact Baidu private message!!
Q:Specific conditions for use of spring washers
Standard for use with spring washers? Should not. Spring washer main role is to prevent loose!
Q:How do you choose the appropriate gasket for bolt or screw connection?
Mainly depends on your needs, such as the bolt is M10, you have to choose the matching. A variety of information can be found from the hardware manual.
Q:Gasket A140 what is the material
A140 belongs to stainless steel, used for corrosive medium environment to do flat washer;
Q:Nominal diameter 12 washers, outside diameter?
According to GB/T 95-2002 - C level standard flat washer, nominal diameter (large thread diameter) 12 flat washer, its outer diameter (Max) = 24 mm;(min) = 22.7 mm.
Q:Do not use self tapping screws
Flat head screws, etc. also does not require the use of gasket. In many applications, the force of the screw is not large, often do not disassemble, there is no need for gaskets. And the existence of the gasket, affect the appearance, does not apply to the use of countersunk head screws.
Q:How to determine the number of washers
As the frame five depending on the length, five links on the left side of the 68mm length of one and two on the right side, the length of the 73mm five on the left side of the right is not installed, install a washer, the thickness is the same as long as you can buy time, usually have three washers.
Q:I would like to ask the car transmission inside the thrust washer (thrust washer) is used to do ah?
Figure 3 thrust washers, 4 needle bearings, thrust washers to prevent excessive wear of the main bearings, the usurper.
Q:Screw, nut, gasket connection order is how ah, elastic gasket and cushion under what circumstances should be placed on the
The effect of several kinds of flat pad, a height adjustment bolt or nut in the side is convenient; two is to increase the contact surface, flat pad at the ends of the more; three is the stable friction coefficient, flat pad on both sides, and tighten the pad is not allowed to transfer medium; four is to prevent injury to pull bolt, in order to prevent stress concentration, the bolt head and the bolt six transition angle bar has great chamfer hole chamfering small, tighten the bolts if the head injury, this washer the chamfered surface into the six hexagon head bolts can be avoided.
Q:A general set of screws have a few nuts, bolts, washers?
A screw nut a flat washer but a spring washer

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