DUCTILE IRON PIPE K9 DN1200

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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:The role of chromium in nodular cast iron
In the bending fatigue test of crankshaft, it is also found that the chromium containing cast nodular iron crankshaft has the characteristics of large ultimate bending moment, high safety factor, overload duration, high strength and small deformation.
Q:What pipe can be used to replace the cast iron pipe in the water supply? Thank you
You are mistaken in concept. The cast iron pipe is the sort of connection method. The ductile iron pipe is classified according to the material.
Q:What is cast iron pipe, specification for cast iron pipe?
According to the different casting methods, the labor intensity is divided into continuous cast iron pipes and centrifugal cast iron pipes, in which the centrifugal cast iron pipes are divided into two kinds: sand mould and metal mould. Divided into gray cast iron pipe and nodular cast iron pipe according to different material. Rubber ring seals for flexible interfaces,
Q:What are the advantages and disadvantages of spheroidal graphite cast iron?
Compared with cast iron, ductile iron has an absolute advantage in strength. The tensile strength of ductile iron is 60K, while the tensile strength of cast iron is only 31k. The yield strength of ductile iron is 40K, while the cast iron does not show yield strength, and eventually breaks. The strength to cost ratio of ductile iron is far superior to that of cast iron.
Q:Ductile iron pipe connection mode
Main points of installation: (1) clean the pipe mouth: clean all the sundries in the mouth. Second, clean aprons, aprons on the adhesive material on the apron: clean up, put the ring bending "plum blossom" or "8" shaped into a socket groove, and hand along the entire ring press again, or with a rubber hammer, to ensure that each part of the warping apron is not twisted, evenly the card in the slot.
Q:How can the ductile iron pipes be treated with corrosion protection?
Bituminous paint coatingBituminous paint coatings are pipes used to carry gas. Preheating the pipe before spraying can improve the adhesion of asphalt paint and accelerate drying
Q:What are the advantages of cast iron pipes?
The cast iron pipe has good sealing performance and is not easy to leak. It can reduce the leakage rate of the pipe network and reduce the daily maintenance cost of the pipe network
Q:How to properly maintain FRP pipes
It has excellent corrosion resistanceDo not use cathodic protection and other anti-corrosion measures to produce two contamination of water and other media. Long service life of products.
Q:How can the cast iron pipe be connected?
Drain pipe or water supply pipe?. The drainage tube as stated on the first floor, water supply pipe of T type and K type and S type, currently dominated by T, a lot of Xinxing Pipes as well, when connecting with T type rubber ring socket socket into the brand, after inserted with oil. The installation team is generally safe.
Q:What is the DN400 installation charge for ductile iron pipes?
1. hourly wage or piece wage: refers to the hourly wage and work hours or the work done by the unit price to pay individual labor remuneration.2. prize: refers to the excess labor and increase revenue of remuneration paid to individuals. Such as saving prize, labor competition prize, etc..3. subsidy: refers to compensate workers special or extra labor and other special reasons for the subsidies paid to individuals, and in order to ensure that the impact of inflation on real wages paid to individual price subsidies. Such as mobile construction allowance, special area construction allowance, high temperature (cold) operation, temporary allowance, aerial allowance and so on.

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