• Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating System 1
  • Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating System 2
Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating

Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating

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Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
1000 pc
Supply Capability:
200000 pc/month

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Specification

Material:
Ductile Cast Iron
Thickness:
50-100mm
Cross Sectional Shape:
Square,Round

1.Cast Iron Manhole Cover Description :

Description:

Code

Clear Opening(mm)

Over Base(mm)

Depth(mm)

Class

202500

200

230

33

A15

202501

200

230

33

B125

202502

300

330

40

A15

202503

300

330

40

B125

202504

400

440

45

A15

202505

400

440

45

B125

202506

400

440

45

C250

202507

400

440

45

D400

202508

550

590

60

A15

202509

550

590

60

B125

202510

550

590

60

C250

202511

550

590

60

D400

202512

700

740

60

A15

202513

700

740

60

B125

202514

700

740

75

C250

202515

700

740

95

D400

202516

760

800

75

A15

202517

760

800

75

B125

202518

760

800

75

C250

202519

760

800

110

D400

202520

800

840

85

A15

202521

800

840

85

B125

202522

800

840

85

C250

202523

800

840

85

D400

202524

900

940

100

A15

202525

900

940

100

B125

202526

900

940

100

C250

202527

900

940

100

D400

202528

1000

1040

100

A15

202529

1000

1040

100

B125

202530

1000

1040

100

C250

202531

1000

1040

100

D400

202532

1325

1365

100

A15

202533

1325

1365

100

B125

202534

1325

1365

100

C250

2.Main Features of the Ductile Iron Manhole Cover:

Strong resistance of acid, alkali, weathering, anti corrosion of water, dust, manhole covers used for gas are well sealed which prevent poisonous gas leaking.

Temperature tolerance is at the range of -40°C-200°C.

FRP manhole covers allow customers’ innovative design, logo, or etc. we have our own design team who can also offer design work for customers.

The cover is not sprayed in surface but painted in whole material so that the color can keep no fading.The products are made anti-noises, which is popular to residential areas.

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:

 Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating

Manhole Cover Ductile Cast Iron GGG40 C250 Bitumen Coating

4.Manhole Cover Specifications:

1) High load rating and strength

2) Against theft and safety options

3)Durable service life.

4)Free design

1) Various manhole cover strictly conform to standard and free from sand holes, blow holes, distortion or any other defects

2) Processes:
  a) Automatic machine lines
  b) Moulding boards
  c) Green sand with hand moulding

5.FAQ:

We have organized several common questions for our clientsmay 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 have a heavy traffic manhole cover but it has been broken by a forklift, why?

A. Forklifts have solid wheels which apply pressure differently to standard pneumatics and therefore covers must be specially adapted to suit this.

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.

Q: There is a little trace of polishingShock polishing is even worseElectrolysis can not be uneven, there is a slight bump
German winter three step mirror polishing 2013 new processYou can free proofing!
Q: What are the factors affecting the machining process of the casting material and structure?
Medium carbon steel begins, and the casting can not be punched and tapped directlyStainless steel, ordinary grade (Fe based alloy element content, less) can not do heat treatment. But processing small holes or tapping to heat treatment (solution. In practice, the annealing treatment can also be). There are a lot of stainless steel matrix is not to say, for example, nickel, cobalt and tungsten. And so on.
Q: The casting defects of pores, trachoma how to repair?
Airhole above 2mm recommended LT101 casting defect repair agent. If repair quality requirements, high availability LT111 iron repair agent, LT112 steel repair agent, LT113 aluminum repair agent, LT114 copper repair agent.
Q: How to get rid of casting sand inside casting parts?
Are you saying that in the sand casting cavity? We use the manual blast, he is like a pipe will be automatic shot out of the grit, into the casting cavity, to remove the internal cavity in the purpose of casting sand!
Q: The casting sand is going on
2, causes(1) sand mold (core) strength is not high, when the box a little reason will fall off.(2) the strength of sand mould (core) is not high, it can not stand the erosion of molten steel.(3) box sand mould (core) crush.(4) high strength under high temperature, warpage, deformation and protuberance into the cast steel under the action of high temperature molten steel.(5) the floating sand in the air hole of the sand mold falls, especially when the floating sand falls in the casting, and the floating sand on the surface of the sand mold is easy to fall through the air vent.(6) when the box is closed, the surface of the mold cavity and the surface of the sand core are not cleaned, and the sand (core) surface has floating sand and so on.
Q: What is the difference between forging parts and casting parts?
No, it's called die castingDifference: the die casting parts are simple in structure and large in batch sizeCasting: the use of a wide range of structures without restrictions
Q: What kind of casting process is used for cast iron parts? And what are the cast steel parts adopted?
Corundum sand: the main mineral composition is corundum alpha -Al2O3, used for investment casting, ceramic mold casting shell materials. The olivine sand: the main mineral composition of olivine (MgFe) 2SiO4, used in cast iron, non-ferrous alloy castings and high manganese steel casting molding sand and the core sand. Silica resources in nature resources, but suitable for casting with high SiO2 content of natural silica sand is not too much. Since 1951, China has carried out a general survey of the casting sand resources in the territory, but mainly limited to the main traffic lines and major industrial cities. Survey results show that Chinese can be used for natural silica sand casting is very rich in resources, a wide range of distribution. Inner Mongolia Zhelimumeng, natural silica sand reserves amounted to hundreds of millions of tons, the particle shape close to the circular, the content of SiO2 is about 90%. Fujian, Jinjiang Dongshan sea sand, the content of SiO2 is 94 to 98%, with a low volume of mud, are good natural silica sand. Are Duchang, Yongxiu Jiangxi County Xingzi, a large number of Quaternary lacustrine deposition of silica sand, the content of SiO2 is about 90%, low iron content, alkaline oxide less, uniform size, is a good lake sand. Guangzhou, Hunan and other places have abundant easily broken weathered sandstone, processing artificial silica sand, the content of SiO2 in more than 96%, can be used for the production of steel castings. Jiangsu Nanjing red sand, sandy mud pure, moderate, strong permeability, good viscosity, high silica content, less water, fine particles, pulls out the casting is smooth, stable quality, can be made of cast iron and non-ferrous metal parts of the sand and core sand
Q: What is the reason for 304 stainless steel precision casting parts to be changed?
Steel deformation control is one of the most common problems in the metal processing industry. Any process will occur. The casting is the largest deformation and the least fine. It is generally used to produce blank blanks
Q: After reaming, the roughness can reach several levels, that is to say, the sample.Casting parts in rocker arm drilling, reaming, roughness, block. After reaming, the roughness can reach several levels, that is to say, the sample.
Not processed, do not understand your problem... There's something wrong with the drilling machine. Please call me
Q: How to solve casting defect casting?
Different defects, different solutions, some shortcomings, the current domestic level can not be resolved

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