• OEM ductile iron manhole covers with superior quality manufactured in Hebei System 1
  • OEM ductile iron manhole covers with superior quality manufactured in Hebei System 2
  • OEM ductile iron manhole covers with superior quality manufactured in Hebei System 3
  • OEM ductile iron manhole covers with superior quality manufactured in Hebei System 4
  • OEM ductile iron manhole covers with superior quality manufactured in Hebei System 5
  • OEM ductile iron manhole covers with superior quality manufactured in Hebei System 6
OEM ductile iron manhole covers with superior quality manufactured in Hebei

OEM ductile iron manhole covers with superior quality manufactured in Hebei

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Loading Port:
Tianjin
Payment Terms:
TT OR LC
Min Order Qty:
100 set
Supply Capability:
4166 set/month

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Product Description


1. Samples are available for free.


2. Our products: produced by the hydraulic Press.


3. Our price: we are the factory that provide the most competitive price with good quality, and large order quantity will get big support by us! Meanwhile, our products are hot sale in China also the rest of the word.

4. Our srevice: OEM srevice.

(If you have any problems, please do not hesitate to contact us!)


OEM ductile iron manhole covers with superior quality manufactured in Hebei

OEM ductile iron manhole covers with superior quality manufactured in Hebei





Specification



Item No.ClassClear Opening(mm)Frame Size(mm)
TD1221D4001220*6751378*831
TD1222D4001220*6751370*830



Advantages



Compressive prices, bending and impact strength, anti-corrosion, not rust, long service life (at least 30 years).

The quality meets the same kinds cast iron manhole covers but the cost is 30% or so lower than other companies.

 


Packaging & Shipping



Packaging: Details Pallet with bubble film or with pallet,

 

Delivery Detail: 8 days if your order is 20"container


OEM ductile iron manhole covers with superior quality manufactured in Hebei

FAQ


1. How about your price?

     A: As one of famous manufacturers of Ductile iron products inChina, Our prices are very favorable and competitive. The customers from all-over the world.

 2. What is your minimum order requirement?
     A: We will indicate the MOQ for each item in the quotation sheet. we accept the sample and trial order. If the quantity of single item can't reach the MOQ, the price should be sample price.


3.How do we start our cooperation?


If you are wholesalers, please send us the detailed information of the products you are handling, like Cover size, clear opening size, loading Grade and so on. we will give you our best advices. We can start from sample order. 

Sometimes if meet the size we don’t have, the new mould with your size and design can be considered from us. Let's talk more details about the New Mould and Charges.Then start our Cooperation.



Q:How do casting parts remove stress?
Annealing treatment, according to different casting annealing treatment, eliminate thermal stress, if need to restore hardness or increase hardness, and then quenching treatment
Q:Why does the precision casting factory not usually make iron castings?
Because it is too cheap, the design of materials is cast iron, generally do not have very high requirements.
Q:How to solve casting defect casting?
Different defects, different solutions, some shortcomings, the current domestic level can not be resolved
Q:How can the casting be free of trachoma?
Measures for the prevention of trachoma in castings:1, sand compaction to high, paint two times;
Q:How to calculate the price of casting parts?
According to the complexity of the workpiece, material and casting requirements and process yield
Q:How is the silicon sol precision casting part priced? What is the price per ton of casting? Such as 304 material.
Yantai five God casting is generally 53 yuan /kg, the appearance is quite beautiful
Q:We are small castings, the need for surface treatment of shot blasting machine, about how much?
The choice of shot blasting machine, this is according to the workpiece size, yield, whether can collision, and the working time and other factors considered, while the price of different blasting machine are not the same, but the vast majority of small castings used crawler shot blasting machine,
Q:What's the effect of casting copper?
Copper is one of the main corrosion resistant alloys. When the mass fraction of copper in cast iron is from 0.25% to 1%, the corrosion resistance of copper in the industrial atmosphere can be obviously increased. But copper has very little corrosion resistance in lye or salt solution.Copper can increase the flowability of molten iron and improve its casting ability remarkably.Copper can increase the coercive force and residual magnetic force, but the permeability is not affected.Combined use of copper with other alloy elements, such as copper chromium, copper chromium molybdenum, copper molybdenum, copper manganese, copper vanadium, can achieve greater results.
Q:The cause of fracture and why there is no toughness
This question is too broad, see what the casting casting Oh in order to reduce the wayward cast steel, ductile iron, gray iron and white iron, you can choose the material according to their own requirements.
Q:Which master knows how the casting tolerances for malleable iron, gray iron and ductile iron should be chosen? Hurry up, thank youCan you provide a tolerance scale for castings, please?
Our country has a national standard for casting tolerance levels. This national standard applies to you in malleable iron, grey cast iron, and ductile iron.

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