Centrifugal ductile iron pipe is widely used and develops rapidly

The main purpose of ductile iron pipes is to help our lives become more convenient. In the country, ductile iron pipes are manufactured in order for our people to live more effectively in the daily lives of society and to develop more rapidly in our careers. It can make our lives more and more advanced and make our development faster and faster. When we build houses, especially when we build factories, we must have a stable job and have good fixation tools to stabilize the buildings of our factories. However, ductile iron pipes are a good helper. They can It plays a very good stabilizing role and makes our factory buildings more stable. It also allows our workers to enter the factory with confidence and do not have to worry about any sudden events, such as fires or explosions. Even if something like this happens, ductile iron pipes can be very stable and support the factory well.

After more than 20 years of certification. Ductile iron pipes have been recognized by many industries. Ductile iron pipes use a new alloy casting process. Not only are there strict requirements for casting molten iron, but a small amount of pearlite is added during the casting process, which gives the iron pipe itself better product performance. This comes after the test of time.

Our products can not only be used in underground pipe networks for pressure-bearing transmission and distribution of urban natural gas and coal gas, but can also be widely used in water and oil pipelines as well as production process pipe networks in the food, pharmaceutical, and chemical industries. Municipal water supply DN200 ductile iron pipe quotation .

Centrifugal ductile iron pipes are recommended products by the China Urban Water Supply Association and the China Urban Gas Association. The centrifugal ductile iron pipe won the National Metallurgical Product Quality Gold Cup Award in 2002.

Ductile tube technology applications:

Ductile graphite pipes are made of magnesium or rare earth magnesium combined with gold spheroidizing agent added to the molten iron before casting to spheroidize the graphite and reduce stress concentration, making the pipe have the advantages of high strength, high elongation, impact resistance, corrosion resistance, and good sealing. ; The inner wall is lined with cement mortar, which improves the pipeline water delivery environment, increases water supply capacity, and reduces energy consumption; the pipe mouth adopts a flexible interface, and the pipe itself has a large elongation rate (>10%), making the pipe more flexible Well, in buried pipelines, it can work with the soil around the pipeline to improve the stress state of the pipeline, thereby improving the reliability of the pipeline network operation. Therefore, at present, my country's water supply industry usually uses ductile graphite pipes as the main material. Municipal water supply DN200 ductile iron pipe quotation.

Design requirements for ductile iron pipes

The buried depth of the pipeline should be determined based on factors such as the degree of freezing, external load, and intersection with other pipelines. Under normal circumstances, the burial depth can be 0.2 meters below the freezing line and meets the following conditions: when the pipe diameter is greater than 100mm, the minimum burial depth at the top of the pipe is 1.20 meters.

The designed trench bottom width is generally the outer diameter of the pipe plus 0.5 meters. According to the soil conditions, determine the excavation slope (i) and draw the trench cross-section.

Ductile iron pipes are the same as other pipes. The head loss along the uniform flow is hf=λ/dv2/2g. The only difference is "λ" (hydraulic friction coefficient), that is, the head loss can be calculated according to the local resistance loss of the original cast iron pipe. calculate. Ductile iron pipes are the same as other pipes. The head loss along the uniform flow is hf=λ/dv2/2g. The only difference is "λ" (hydraulic friction coefficient), that is, the head loss can be calculated according to the local resistance loss of the original cast iron pipe. calculate.

The emergence of ductile iron pipes provides a new type of pipe with excellent performance for my country's water supply industry. In order to better apply ductile iron pipes in projects, design and construction personnel should be familiar with the characteristics of ductile iron pipes, constantly find problems and solve them, make the design more reasonable and the construction more standardized, so that the new pipes can play a better role in water supply projects. big effect.

Ductile iron water supply pipes have the advantages of high strength, toughness, good vibration resistance, corrosion resistance, and easy installation. Its strength is higher than steel pipes, its elongation is greater than 10%, and its corrosion resistance is stronger than steel pipes. Ductile iron pipes are used as water distribution pipes to ensure water quality. When the ductile iron pipe leaves the factory, the outer surface is generally sprayed with a zinc layer or coated with asphalt. The anti-corrosion inside the pipe is coated with cement mortar lining. Therefore, the ductile iron pipe shipped from the factory already has a certain degree of anti-corrosion, and there is no need to add special anti-corrosion measures. The anti-corrosion performance of the selected ductile iron pipe should meet the anti-corrosion standards.

Centrifugal ductile iron pipes are produced in strict accordance with the national standard GB/T13295-2013. We can provide high-quality products of various pipe diameters with a length of 6M and DN80-1200mm, and can also arrange production according to other standards required by users. The products can not only be used in the pressure-bearing transmission and distribution underground pipeline network of urban natural gas and coal gas, but can also be widely used. It is used in water transportation, oil transportation, pipelines, and production process pipe networks in food, pharmaceutical, chemical and other industries to meet the needs of various users. Ductile iron pipe specifications are mainly centrifugal ductile iron pipes from DN80mm to DN1200mm. Feixiang Cast Pipe is mainly committed to the large-scale production of high-quality centrifugal ductile cast pipes of various specifications. With its sophisticated equipment and facilities and strong technical force, the company The centrifugal ductile cast pipes and supporting pipe fittings produced by the company have high strength, high elongation, and excellent corrosion resistance, and greatly reduce production costs to ensure greater benefits for users. National standard centrifugal ductile iron pipes are used for underground water transmission ductile pipes. Graphite in ductile iron exists in the form of spheroids. Generally, the size of graphite is grade 6-7. The quality requires that the spheroidization grade of the cast pipe be controlled to grade 1-3 (spherical (ratio ≥80%). After adding nodularizing agent to the cast molten iron above No. 18, the pipes are centrifugally cast at high speed by the centrifugal ductile iron casting machine. Therefore, the mechanical properties of the material itself have been better improved, and it has the essence of iron. Steel performance. The metallographic structure of the ductile iron pipe after annealing is ferrite plus a small amount of pearlite, and the mechanical properties are good.

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