• Manhole Cover with Squar Net Base on Sale System 1
  • Manhole Cover with Squar Net Base on Sale System 2
Manhole Cover with Squar Net Base on Sale

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

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.

Q:What is the reason why the rubber washer is small after use?
The quality is not good or lubricating oil and rubber ring reaction
Q:When do flat washers use GB95 when using GB97.1?
There is no difference in the application. See the tolerance, the high requirements of the use of GB97.1. in order to save money, and the application environment is not high, use GB95
Q:Nominal diameter 12 washers, outside diameter?
at present our country flat washer implement related standards are as follows:
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:What is the difference between gaskets and seals?
The washer is used to protect the surface of the connector from the nut and the pressure of the dispersed nut on the connecting piece. Sealing ring to prevent leakage of lubricating oil and foreign invasion.
Q:I would like to ask the car transmission inside the thrust washer (thrust washer) is used to do ah?
Transmission in order to reduce the noise, the general design of gear teeth, which in the operation of radial force, thrust washer is to prevent excessive wear of the gear side!
Q:Stud that head or nut that ah, I need to have the authority of the provisions of the document, please know that the prawns are told, thanks to!
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:When is the gasket (flat pad, spring pad)
A washer to prevent loosening of bolts. That is, elastic washer, anti loose washer works very simple. It consists of two washers. The outside is embossed with a radial surface, while the inner oblique tooth surface. When assembled, the medial oblique tooth surface relative to the outer radial surface and both ends of the contact surface relief into the occlusal state when the connectors are vibration, and the trend of bolts loosening, only allow two washers inside oblique tooth relative dislocation, resulting in uplift of tension, so as to achieve the 100% locking.
Q:how much Specification for washers
From 2.5~48, the form of GB/T854-1998, GB/T855-1998, GB/T856-1998
Q:I would like to ask what is the standard gasket and gasket in general what material?
Carbon steel, if there are 45 steel, 65 manganese, that is, medium carbon steel, low carbon steel.

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