Manhole Cover with Squar Net Base 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
Surface Treatment: Zinc Plated

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. 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.
2. 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.
3. 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.
4. No color fading
The cover is not sprayed in surface but painted in whole material so that the color can keep no fading.
5. No noise
The products are made anti-noises, which is popular to residential areas.
Manholes allow access to underground pipes, cables, meters and facilities.
BS EN124 Standard:
A15: Area which can only be used by pedestrians and pedal cyclists.
B125: Footways, pedestrian areas and comparable parks or car parking decks.
C250: For gully tops installed in the area of curbside channels of roads.
D400: Carriage ways of roads(including pedestrian streets), hard shoulder and parking areas, for all types of road vehicles.
E600: Areas of imposing high wheel loads, e.g. dock and aircraft pavements
3.Manhole Cover Images:

Manhole Cover with Squar Net Base on Sale

Manhole Cover with Squar Net Base 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) 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) Packing:
Wooden case or wood pallet, or as per customers' requirement
5)  Payment terms: T/T or L/C
6)Inspection
A)Inspection by our factory
B)The third party inspection,SGS
5.FAQ:
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.

Q. Odours are coming through where I have installed my manhole cover, why?
A. Your cover must be sealed and locked, or neoprene sealed, so you would require a T-Range Cover, or if you require a solid top, a selection of the PC range (e.g. PC2BG3, PC6CG3, not PC2BG) are suitable.

Q. I need access through my manhole cover on a regular basis, is this possible?
A. Yes, the majority of covers have built-in lifting keys, and for those that don’t we also supply lifting keys. However, the best way to obtain easy access is to have a bespoke, hinged manhole cover.

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Q:Screw, nut, gasket connection order is how ah, elastic gasket and cushion under what circumstances should be placed on the
Washer look at the situation there is a large screw hole to prevent the screw directly into the hole on the installation of the screw to prevent the nut back on the nut installed on the other side of the file?
Q:Would like to know the role of flat washer?
Flat washer1 generally used for multiple parts, to increase the bearing surface, covering the larger hole, to prevent damage to the surface of the parts, large washers for wood parts.
Q:How to use washer, gasket, o-ring "
Different purposes, the installation position and the corresponding flange are different, if this is how to choose, advantages and disadvantages, too much information
Q:Why do you have to add a spring washer when it comes to the role of ah ah ah
If the screw on a spring washer, screw and screw hole fixed, due to the role of the spring washer spring will greatly reduce the possibility of loosening screws, falling off
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:Nominal diameter 12 washers, outside diameter?
at present our country flat washer implement related standards are as follows:
Q:A general set of screws have a few nuts, bolts, washers?
A screw nut a flat washer but a spring washer
Q:Specific conditions for use of spring washers
The conditions for the use of spring washers are as follows:The application of spring washer, can be applied to the following four standards: standard spring washer (GB93-1987), light spring washer, (GB859-1987), heavy spring washer (GB7244-1987).The purpose of the spring washer is to prevent the nut from loosening. In the national standards are illustrated. The six corners of the slotted nut is matched with the bolt and screw for end with hole, so that the split cotters inserting screw nut from the groove in the hole, preventing the nut macnaught loose, mainly used for vibration load or alternating load applications.
Q:Do not use self tapping screws
No provisions of self tapping screws without gasket, but because the self tapping screws are often used in non regular removal of the place, and will not force big place, so unless there is a need to increase the stress area of the nut, generally do not have to use the gasket.Self tapping screws also have a flat head, in this case, the general should be smaller than the top of the back, or else they can not get into the hole in the ah.
Q:Which is better than the spring washer and the inner tooth?
If you ask this question if it is to lock up, then want to effect a little better, it is recommended to use double-sided tooth lock washer, I can give you the price of understanding, Baidu my user name!

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