Manhole Cover with Square from China High Quality

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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: Square Power Supply: AC Power,DC Power,Gasoline,Diesel
Customized: Customized,Non-Customized Surface Treatment: Nickel Plated,Copper Plated,Chrome Plated,Polishing,Zinc Plated

Product Description:

1.Ductile Iron Manhole Cover Description :
1.Advantages: Good compressive, bending and impact strenth,anti-corrosion, not rust, long service life(at least 30 years). The quality meets the same kinds cast ion manhole covers but the cost is 30% lower than. Contain no metal and no recovery value, anti-theft.
2.Applications: water supply and drainage, fire engineering, natural gas,electricity and telecommunications, street lamp and outdoor illuminations.
2.Main Features of the Ductile Iron Manhole Cover:
•High endurance
•High Strength
•Pressure Resistence
•Anti-corrosion
•Anti-theft
•Good visual effect
Applications:
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:

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Manhole Cover with Square from China High Quality

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:

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:What is the meaning of the gasket / gasket material bar 200HV?
Surface Vivtorinox hardness, general requirements not less than the number of commonly used non-ferrous metals, such as bronze, tin bronze, etc.
Q:Flat gasket with what material
According to the flat washer performance grade, recommend the use of materials:For the 100HV level can choose ST12, ST13 and Q235, Q215, Q195, etc., the surface hardness can reach about 110HV;For the 140HV level can choose 08F, 08Al and 10, 10F, etc., the surface hardness can reach about 140HV;For the 200HV and 300HV level should choose 45, 50, 60, 70 steel or 65Mn steel, heat treatment can be quenched and tempered to reach the technical requirements of 200 ~ 300HV and 300 ~ 400HV.
Q:how to Flat washer installation
Flat washers are usually thin pieces of various shapes, used to reduce friction, prevent leakage, isolation, to prevent loose or disperse pressure. Such components are used in many materials and structures to perform similar functions. Due to the limitation of the material and the process of the threaded fastener, the supporting surface of the bolt and the like is not large, so that the surface of the connecting piece is protected by reducing the compressive stress of the bearing surface.
Q:How do you choose the appropriate gasket for bolt or screw connection?
When the bolt is connected, the target of the washer is to disperse the material which is connected with the material, reduce the damage to the surface of the material to be connected when the bolt or the nut is reduced, or prevent the loosening of the bolt. When you choose the gasket can be the actual need to relax the use of spring washers, to protect the surface of the material to be connected, optional plain washers. The principle of choice is that the inner diameter of the washer is slightly larger than the outer diameter of the bolt. Screw connection, the use of slightly larger than the location of the largest screw flat washers can be.
Q:Why do some nuts and washers, and some nuts without washers
This is according to the requirements of the guests. Some need to add, some do not need to add
Q:When is the gasket (flat pad, spring pad)
The part between the connecting piece and the nut. A flat metal ring is generally used to protect the surface of the connecting piece from the nut.
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: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:I would like to ask what is the standard gasket and gasket in general what material?
Less dosage, the metal with Q235, rubber with XB200, are very common. If the amount is large, according to the situation to choose the most economical
Q:how to use Motor washer
Spring washer loose, as well as sealing gasket, corrugated gasket clearance

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