DUCTILE IRON PIPES C Class DN200

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Ductile Iron Cast Pipe is without any defects compare with tradition casting tech, which has many advantages particularly as follow:

(1) High density. In the "vertical upward casting" process, the melt iron of centre liquid column in center crystallizer is continuously feeding for volume shrinkage caused by condensation tube at outer circumference , which lead to be free of shrinkage porosity.

(2) High purity. When melt iron pouring, the mixed impurities such as gas, dross, sand grain which are lighter than melt iron could be eliminated at furnace mouth, its impossible to enter into the crystallizer through the channel, so the melt iron into the crystallizer is very pure.

(3) Strength with toughness. The cooling speed provided by continuous crystallizer is 30 times than sand casting and 5 times than centrifugal casting, and doesn't produce white iron, the eutectic cell volume of continuous cast iron is one eighth to one tenth compare with traditional cast iron. The density of graphite nodule in ductile iron can reach 300-700 pcs/mm2. Therefore, all reason above improve the strength and toughness of continuous cast iron.

(4) Free machining. The high speed cooling make the hardening phase (such as boride, steadite) not appear like reticular, massive or thick, but diffuse like fish bone and pane in shape, moreover, there are tiny graphite flakes inlaid hardening phase. It's free machining in BrinellHardness the range of 250-300HB. However, the Brinell Hardness of 250 is top limit to common metal materials.

(5) Uniform composition of tube wall. The convection mixing of liquid column caused by marching type drawing in crystallizer make the composition of tube wall well-distributed, and concentration gradient very little.

(6) High productivity. To the wall thickness of tube under 10mm, the speed of continuous casting is 1 meter/min, to the wall thickness of tube under 20mm, the speed of continuous casting is 0.5 meter/min, which is high efficiency that centrifugal or other casting tech couldn't reach.


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Q:What are the differences between ductile cast iron pipes and centrifugal ductile iron pipes?
Centrifugal casting is a casting method. Ball milling cast iron pipe is a kind of material.
Q:What is the wall thickness of K10 grade dn=400 ductile iron pipe?
Ductile iron pipe, class K10, DN400 theoretical weight table:Grade K10, DN400 ductile iron pipe wall thickness (T):9mm.Nominal diameter (DN) 400mm, its outer diameter (DE) 429mm.The approximate weight (kg) 29.5. of the crown of the socket;Straight part weight per meter (kg) 83.7.Total quality (kg) (length standard 6000mm) 532.Total mass (kg) (standard work length 5000mm) 448.The main characteristics of ductile iron pipes: ductile iron pipe is a kind of cast iron pipe. Having the nature of iron; the properties of steel. Ductile cast iron pipe after annealing, the microstructure is ferrite and pearlite, good mechanical properties, excellent corrosion resistance, good ductility, good sealing effect, simple installation, mainly for municipal, industrial and mining enterprises, water supply, gas, oil etc..
Q:Will nodular cast iron pipes rust?
Qualified ductile iron pipe requires lining standard cement. The outer wall of pipe needs spraying zinc treatment and asphalt paint coating, and other epoxy resin paint can also be selected. Qualified ductile iron pipes can be used for more than a hundred years. The main place where rust is easily exposed is where the outer wall meets the soil because of its high humidity and high oxygen content. Qualified anticorrosion can effectively resist rust, its process principle can not give you the details.
Q:Can ductile iron pipes be installed outdoors?
Ductile iron pipe is a kind of cast iron. It is an alloy of iron, carbon and silicon.
Q:Is the water cast iron pipe 100% for hydrostatic test?
Domestic manufacturers, such as steel group wing ductile iron pipe limited liability company, Xinxing Ductile iron pipes, Saint Gobain pipe is 100% factory test pressure, test pressure in 3.2-5.0MPa according to different specifications.
Q:Water supply pipe is ductile iron, then it's fittings and valves and other parts must be ductile iron?
Not always。Valve material selection is mainly determined by the fluid medium.The medium can be divided into gas, liquid, corrosive gas, liquid and oil. According to different media, temperature, and pressure levels, choose different materials, plastic, cast iron, cast steel, stainless steel and so on.
Q:Ductile iron pipe converter, steel transition DN100 turn 100, what is the specific accessories name? Can you supply photos?
Strong toughness: the pipe can be stretched to 5 times the original length without fracture, which is suitable for uneven geological conditions without affecting its link performance. In the case of a breach, there is no extension of the mouth due to the breach.
Q:Fire water supply network adopts ductile iron pipe, the test pressure should be no more than MPa
Strictly speaking: the outer pipe network and the internal pipe network are the same. Minimum fire 1.0MPa, minimum sprinkler 1.4MPa. Because not only in accordance with the water pump, but also take into account the pressure on the fire engine.
Q:Which is better, ductile iron pipe and spray plastic pipe?
Ductile iron pipe corrosion resistance, strength, it is said that the Ming Dynasty ordinary cast iron works now, and now has a new type of dedicated, can be used, construction becomes very convenient, ductile iron pipe has no effect on water quality. Plastic sprayed steel pipe is a new type of pipeline with higher price.
Q:What's the difference between cast iron pipe and steel pipe?
Cast iron pipes (Cast, Iron, Pipe), cast cast pipe. Cast iron pipes are used for water supply, drainage and gas transmission lines. They include cast iron pipes and pipe fittings. Labor intensity is small. According to the casting method, it is divided into continuous cast iron pipe and centrifugal cast iron pipe, in which the centrifugal cast iron pipe is divided into sand mould and metal type two kinds. Divided into gray cast iron pipe and nodular cast iron pipe according to different material. According to the interface form, it is divided into flexible interface, flange interface, self anchored interface, rigid interface and so on. Among them, the flexible iron pipes rubber sealing ring; flange interface cast iron pipe flange fixed in the rubber pad, the flange gasket sealing; rigid interface cast iron pipe socket is large, straight pipe is inserted, sealed with cement, this technology has been basically eliminated

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