DUCTILE IRON PIPE DN80 K9

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Specification:

1) The standard of pipe: ISO2531:1998, K9

2) Effective length: 6m

3) Inner cement line: Portland cement line as per ISO4179

4) Zinc coating: at least 130g/m² as per ISO8179

5) Bitumen painting: at least 70um as per ISO8179

6) With 100% quantity of NBR ring, or SBR ring, or EPDM ring as per ISO4633

7) DN80mm-800mm

8) High strength, lighter than grey iron, good corrosion resistance, no furring, small flow resistance, easy fixing, long life tome about 100 yeas

9) Produced by Hangzhou chunfeng machine

10) Checked by automatic inspection equipment

11) Composition:

Chemical composition
Chemical composition	Ductile Cast Iron Pipe (%)	Grey iron pipe (%)	Steel pipe (%)
C	3.5-4.0	3.2-3.8	0.1-0.2
Si	1.9-2.6	1.4-2.2	0.15-0.4
Mn	0.15-0.45	0.4-0.6	0.3-0.6
P	≤0.06	≤0.3	0.02-0.03
S	≤0.02	≤0.1	0.02-0.03
Mg	0.03-0.06

12) Feature:

Mechanical properties
	Ductile Cast Iron Pipe	Grey Iron Pipe	Steel Pipe
Tensile Strength(Mpa)	≥420	150-260	≥400
Yield Strength(Mpa)	≥300	No Confirmation	No Confirmation
Bending Strength(Mpa)	≥590	200-360	≥400
Elongation (%)	≥10	Neglected	≥18
Brinell Hardness(HBS)	≤230	≤230	About 140

13) T type mechanical joint

14) Packing: in bulk or container

Q: Is the cast iron pipe buried in need of antiseptic treatment? What kind of anticorrosive materials are used?: Need general brush oil can.

Q: How are ductile iron pipes restrained against axial thrust forces?: Axial thrust forces are effectively restrained in ductile iron pipes by utilizing both mechanical restraints and soil resistance. A commonly employed method involves the use of thrust blocks, which are concrete structures constructed at bends, tees, and other directional changes in the pipeline. These blocks are specifically designed to withstand axial forces and prevent any shifting or movement of the pipes caused by the pressure exerted by the flowing fluid. Furthermore, additional support and prevention of axial movement are achieved through the implementation of mechanical restraints, such as pipe restraints, thrust collars, and anchor blocks. Pipe restraints are devices installed around the pipe and connected to adjacent structures, such as walls or concrete collars, in order to prevent any sort of movement. Thrust collars, on the other hand, are utilized to absorb and distribute the thrust forces generated by the flowing fluid. These collars, typically made of ductile iron or steel, are securely fastened around the pipe to counteract axial movement. Moreover, soil resistance plays a crucial role in restraining axial thrust forces. The weight of the soil surrounding the pipe creates frictional resistance, which effectively counteracts the axial forces. In order to ensure effective soil resistance, it is vital to properly backfill the trench, compact the soil, and adequately embed the pipe in the soil. In conclusion, a comprehensive approach involving the use of mechanical restraints such as thrust blocks, pipe restraints, and thrust collars, along with the soil resistance provided by proper trench backfilling and compaction, is employed to restrain axial thrust forces in ductile iron pipes. This approach guarantees the secure placement of the pipes and their ability to withstand the axial forces exerted by the flowing fluid.

Q: How do ductile iron pipes perform in seismic zones?: Due to their unique characteristics and design features, ductile iron pipes have demonstrated exceptional performance in seismic zones. These pipes possess the ability to withstand ground movements, vibrations, and other seismic forces that may arise during an earthquake. The flexibility inherent in ductile iron pipes enables them to absorb and distribute the energy generated by seismic activities. This flexibility prevents the pipes from fracturing or breaking when subjected to intense ground shaking. Moreover, the high strength and resilience of ductile iron make it highly resistant to damage caused by ground movements. Furthermore, ductile iron pipes are designed with joints that are restrained, providing increased stability and resistance against seismic forces. These joints can accommodate small lateral movements without compromising the integrity of the pipeline system. Additionally, the restrained joints prevent the pipes from becoming disconnected or misaligned during seismic events, guaranteeing the uninterrupted flow of water or other fluids. In seismic zones where the ground is more susceptible to liquefaction or soil settlement, ductile iron pipes are often installed using methods that enhance their stability. For example, deep embedment techniques or the inclusion of thrust blocks at bends and fittings increase the pipes' resistance to lateral forces exerted by the ground. Regular inspection and maintenance further enhance the performance of ductile iron pipes in seismic zones. Periodic assessments can identify any potential weaknesses or damages that may have occurred during seismic events, enabling prompt repairs or replacements. Overall, ductile iron pipes have a well-established track record of reliable performance in seismic zones. Their flexibility, strength, and design characteristics make them highly resilient against seismic forces, ensuring the safe and uninterrupted supply of water or other fluids, even in earthquake-prone areas.

Q: What is the expected hydraulic efficiency of ductile iron pipes?: The expected hydraulic efficiency of ductile iron pipes is generally high, as they have a smooth interior surface that minimizes friction and allows for efficient flow of water or other fluids.

Q: Are there any specific standards or specifications for ductile iron pipes?: Yes, there are specific standards and specifications for ductile iron pipes. The most widely recognized standards for ductile iron pipes include ISO 2531, EN 545, and ASTM A536. These standards outline the requirements for the material composition, physical properties, dimensions, and testing methods of ductile iron pipes. Additionally, different countries or regions may have their own specific standards or specifications for ductile iron pipes.

Q: Can centrifugal cast iron pipe be galvanized or coated with asphalt which is good for corrosion prevention?: The centrifugal ductile iron pipe has the advantages of zinc coating and asphalt coating, and it is used in combination with two. By spraying zinc and epoxy coal tar coating of ductile iron pipe wall (or epoxy resin paint, polyurethane, etc.) wall using Portland cement (or epoxy powder, epoxy, polyurethane, ceramics etc.) wall coating can effectively active substances in soil and the formation of an insoluble zinc salt protection tube, the internal coating can inhibit corrosion of pipe body fluid medium.

Q: What is the difference between flexible joint mechanism and seismic cast iron pipe DN100 and ductile iron pipe?: Nodular cast iron has high strength and strong plasticity. The tensile strength of ductile iron is twice that of gray iron, and the yield strength even exceeds that of cast steel.

Q: How do ductile iron pipes handle concentrated loads?: Ductile iron pipes are designed specifically to effectively handle concentrated loads. Their unique composition and manufacturing process give them excellent strength and durability, making them highly resistant to cracking or breaking under heavy loads. One of the main features of ductile iron pipes is their high tensile strength, allowing them to withstand concentrated loads without deforming. During the production process, small amounts of magnesium are added to cast iron, transforming the brittle graphite flakes into nodular graphite. This modification greatly enhances the material's strength and ductility, enabling it to handle concentrated loads more effectively. Furthermore, ductile iron pipes have a high modulus of elasticity, meaning they can deform elastically under a load and then return to their original shape once the load is removed. This property allows the pipes to evenly distribute the concentrated load along their entire length, reducing stress concentrations and minimizing the risk of fractures or failures. Additionally, ductile iron pipes have a thick and robust wall thickness, ensuring exceptional structural integrity. This thickness enables the pipes to bear significant loads and withstand pressure variations without compromising their overall performance. In conclusion, ductile iron pipes are engineered specifically to handle concentrated loads due to their high tensile strength, elastic deformation capabilities, and thick wall thickness. These characteristics make them a reliable choice for a variety of applications, including water and wastewater systems, as they can withstand external forces without compromising their structural integrity.

Q: Ductile iron 600-3 grade, tensile strength, how to test, there is a simple way?: General use of tensile machines, such as quality management, this aspect should be strictly controlled, otherwise the data is not accurate, do nothing, no one wants

Q: What material is ductile cast iron 235A?: Pig iron is an alloy of iron and carbon carbon content more than 2%, pig iron carbon content is generally in 2.5%--4%, including C, SI, and Mn, S, P and other elements, is the use of iron ores in blast furnace products. According to the different forms of carbon in pig iron, and can be divided into pig iron, cast iron and steel ball ductile cast iron. Several precipitation of spherical graphite cast iron. The cutting action on the metal substrate than spheroidal graphite flake graphite cast iron, the strength of the matrix organization strength of 70 ~ 90%, the tensile strength is up to 120kgf/mm2, and has good toughness. Ductile iron chemical composition besides iron usually contains: the amount of carbon 3.3.8%, silicon 2.3.0%, manganese, phosphorus, sulfur and no more than 1.5% of the total amount of rare earth, magnesium spheroiditic agent.

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