DUCTILE IRON PIPE DN80

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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:Can ductile iron pipes be used for trench crossings?: Yes, ductile iron pipes can be used for trench crossings. Ductile iron pipes are known for their high strength and durability, making them suitable for various applications including trench crossings. They have the ability to withstand heavy loads and provide increased resistance to external forces, making them a reliable choice for such purposes.

Q:Why is the cast iron tube lined with cement? Under what circumstances are ductile iron pipes lined with cement, and under what circumstances do not have to be lined with cement?: The cement lining protects the water quality, reduces the head loss and improves the service life of the spheroidal graphite pipe. As long as the water delivery hose is used, the cement lining must be used. There is no lining cement for conveying air.

Q:How are ductile iron pipes protected against stray current corrosion?: Ductile iron pipes are protected against stray current corrosion through the implementation of various measures. One common method is the installation of a protective coating, such as an epoxy or zinc coating, on the external surface of the pipes. This coating acts as a barrier, preventing direct contact between the pipe and the surrounding soil or water. Additionally, cathodic protection systems, such as impressed current or sacrificial anode systems, can be employed to further protect the pipes. These systems help to control and redirect stray currents, minimizing their impact on the ductile iron pipes and preventing corrosion.

Q:How to control mortar proportioning in ductile iron pipe cement coating: The mix ratio of cement coated mortar for ductile iron pipes refers to the weight ratio of various raw materials consisting of ductile iron pipes and cement coated mortars.

Q:Ductile iron and gray iron is what are the advantages and disadvantages of it: Comparison of nodular cast iron and cast steelThe strength of nodular cast iron is comparable to that of cast steel. Ductile iron has higher yield strength, the lowest yield strength is 40K, while the yield strength of cast steel is only 36k. In most municipal applications, such as water, brine, steam, ductile iron has more corrosion resistance and oxidation resistance than cast steel. Because of the spheroidal graphite microstructure of nodular cast iron, nodular cast iron is superior to cast steel in reducing vibration ability, so it is more beneficial to reduce stress. An important reason for choosing ductile iron is that ductile iron costs less than cast steel. The low cost of ductile iron makes this material more popular, more efficient and less costly for ductile iron.

Q:Can ductile iron pipes be used for slurry transportation?: Yes, ductile iron pipes can be used for slurry transportation. Ductile iron pipes are known for their high strength and durability, making them suitable for various applications including slurry transportation. Slurry is a mixture of solid particles and a liquid, which can be abrasive and corrosive. Ductile iron pipes have excellent resistance to abrasion, corrosion, and erosion, making them capable of handling the challenges posed by slurry transportation. Additionally, ductile iron pipes offer a smooth inner surface, reducing friction and improving the flow of slurry. Therefore, ductile iron pipes are a reliable choice for slurry transportation systems in industries such as mining, wastewater treatment, and oil and gas.

Q:How do ductile iron pipes handle ground settlement?: Ductile iron pipes are highly effective in handling ground settlement due to their inherent flexibility and resistance to deformation. The unique properties of ductile iron, including its high tensile strength and elongation capacity, make it an ideal material for withstanding ground movement. When ground settlement occurs, which is the downward movement of soil or sediment, ductile iron pipes have the ability to flex and adjust to the shifting ground without fracturing. The pipes can absorb the stress caused by the settlement and distribute it evenly along their length, minimizing the risk of cracks or breaks. Furthermore, ductile iron pipes are designed with a bell and spigot joint system, which allows for slight movement and rotation at the joints. This feature enables the pipes to accommodate ground settlement by absorbing any misalignment or shifting of the surrounding soil. Additionally, ductile iron pipes have a higher load-bearing capacity than other materials like PVC or HDPE. This means that they can withstand heavier loads and pressures from the surrounding soil, reducing the risk of pipe failure or collapse during ground settlement. In conclusion, ductile iron pipes are well-suited to handle ground settlement due to their flexibility, resistance to deformation, and ability to distribute stress evenly. Their unique properties ensure that they can withstand the challenges posed by shifting ground conditions, making them a reliable choice for underground infrastructure projects.

Q:What is the excavation width of ductile iron pipes with diameters greater than 1400?: When the condition does not allow enough slope, it is necessary to do wall protection and other means to ensure safetyRemind me, such a big pipe, dig deep in two ways. One is the depth diameter (range at the junction of 1.6 m in length and 500 for manholes and operation. The lower bolt assembly when) there is a depth diameter plus 500. and then in the trench laying branch the pier, installed after the fine stone tamped backfill.Can also be buried directly with the pipe diameter, and then put into the assembly. This method requires a large space on the ground, otherwise, the volume is too large after assembly, weight is too heavy, may cause damage to the pipeline and personnel injuries

Q:What is a slide in type T flexible interface?: The disadvantage of the T type interface is the ability to prevent pipe slippage because the interface can not withstand axial forces, so the base of the line is positioned against the axial forceFigure slider type (type T) interface (TYT type)The T type interface utilizes the self sealing action of the rubber ring to preserve the tightness of the water, as shown in the following figure. The so-called self sealing action is that the rubber ring is subjected to fluid pressureFig. interface rubber sealWhen the actual contact pressure to form a rubber ring is equal to the contact pressure and the fluid pressure generated by the installation of pre compression on the rubber ring and the new contact pressure. Due to the contact pressure than the fluid pressure, so the interface has good sealing function.

Q:What is the average weight of ductile iron pipe?: The size and thickness of ductile iron pipe can cause fluctuations in its average weight. Typically, smaller diameters of ductile iron pipe weigh around 3.5 pounds per foot, while larger diameters can exceed 20 pounds per foot. It is essential to acknowledge that these weights are rough estimates and might slightly differ depending on the manufacturer and pipe specifications.

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