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:How does ductile iron pipe perform in high-velocity flow conditions?: Ductile iron pipe performs well in high-velocity flow conditions. Its inherent strength and durability make it resistant to the forces of high-velocity flow, minimizing the risk of damage or failure. The material's ability to withstand pressure surges and turbulence ensures reliable performance even in demanding flow conditions.

Q:Are ductile iron pipes resistant to biogenic sulfide corrosion?: Yes, ductile iron pipes are resistant to biogenic sulfide corrosion. The high strength and durability of ductile iron make it highly resistant to the corrosive effects of biogenic sulfide, making it an ideal choice for underground sewer and wastewater applications.

Q:Are ductile iron pipes suitable for fire protection systems?: Ductile iron pipes are a perfect choice for fire protection systems. Ductile iron, being a robust and durable material, can endure extreme pressure and temperature fluctuations, making it an ideal option for reliable and long-lasting pipes in fire protection systems. Moreover, ductile iron demonstrates exceptional resistance to corrosion, preventing any deterioration of the pipes and ensuring the integrity of the fire protection system over time. Additionally, the high tensile strength of ductile iron provides added safety advantages, as it can withstand the stress and strain that may arise during a fire incident. Consequently, ductile iron pipes are extensively utilized in fire protection systems across various applications, including commercial buildings, industrial facilities, and residential areas.

Q:Does the cast iron pipe need separate corrosion protection?: No, the inner and outer corrosion protection of the tube has been done.

Q:Can ductile iron pipes be used for trenchless pipe rehabilitation methods?: Yes, ductile iron pipes can be used for trenchless pipe rehabilitation methods. Trenchless methods such as cured-in-place pipe lining or pipe bursting can effectively repair and rehabilitate ductile iron pipes without the need for extensive excavation. These methods provide a cost-effective and efficient solution for rehabilitating aging or damaged ductile iron pipes while minimizing disruption to the surrounding environment.

Q:How do ductile iron pipes handle ground movement in earthquake-prone areas?: Ductile iron pipes are known for their excellent resistance to ground movement, making them a reliable choice for earthquake-prone areas. These pipes are designed to withstand external forces, including the ground shifting and movement caused by seismic activities. The flexibility of ductile iron pipes allows them to absorb and distribute the energy generated during ground movement. This flexibility is achieved due to the unique composition of ductile iron, which includes nodular graphite in its microstructure. The nodular graphite provides ductility and resilience to the pipe, allowing it to deform under stress without fracturing. When an earthquake occurs and the ground starts to move, ductile iron pipes can adapt to the changing conditions. They have the ability to elongate, compress, and bend, thus reducing the risk of pipe failure. This characteristic is crucial in earthquake-prone areas, as it helps prevent catastrophic failures and water loss that can occur with more rigid pipe materials. Moreover, ductile iron pipes have a high level of joint integrity, which further enhances their ability to handle ground movement during seismic events. The joints of these pipes are designed to withstand lateral and angular movement, ensuring that they remain intact and leak-free. In addition to their inherent flexibility, ductile iron pipes are often installed using techniques that enhance their resistance to ground movement. Anchoring systems, such as thrust blocks and restraints, can be utilized to secure the pipes and prevent excessive movement. These systems help to stabilize the pipeline network and further minimize the potential for damage during earthquakes. Overall, the combination of ductility, joint integrity, and anchoring systems make ductile iron pipes a reliable choice for handling ground movement in earthquake-prone areas. They provide a durable and resilient solution that can withstand the challenges posed by seismic activities, ensuring the continuous supply of water and minimizing the risk of infrastructure damage.

Q:How are ductile iron pipes protected against internal corrosion caused by chemicals?: Ductile iron pipes are protected against internal corrosion caused by chemicals through a combination of several protective measures. Firstly, these pipes are usually lined with a cement mortar lining or an epoxy coating. This lining acts as a barrier between the chemical substances in the water or sewage and the iron material of the pipe, preventing direct contact and corrosion. In addition to the lining, a corrosion-resistant polymer or bituminous coating is often applied to the exterior of the ductile iron pipes. This coating serves as an extra layer of protection, safeguarding the pipe against any external chemical exposure that may occur. Furthermore, cathodic protection is commonly employed to prevent internal corrosion. This technique involves the use of sacrificial anodes, typically made of zinc or magnesium, which are attached to the pipe. The anodes corrode over time instead of the iron, effectively sacrificing themselves to protect the pipe from corrosion caused by chemicals. Regular maintenance and monitoring of the ductile iron pipes are also crucial in preventing and addressing any potential corrosion issues. This includes routine inspections, cleaning, and repairing any damaged or corroded areas promptly. Overall, the combination of lining, external coating, cathodic protection, and maintenance practices ensures that ductile iron pipes are well-protected against internal corrosion caused by chemicals, prolonging their lifespan and ensuring the integrity of the pipeline system.

Q:What are the different methods for restraining ductile iron pipe?: There are several different methods for restraining ductile iron pipe. These methods are used to prevent movement or displacement of the pipe due to internal pressure, external forces, or ground movement. The most common methods for restraining ductile iron pipe include: 1. Thrust blocks: Thrust blocks are concrete blocks or structures that are placed against the pipe at bends, tees, or other changes in direction. These blocks are designed to resist the forces exerted by the flowing water or other fluids within the pipe, effectively anchoring the pipe in place. 2. Mechanical restraints: Mechanical restraints, such as harnesses or clamps, are devices that are installed around the pipe and attached to a fixed structure, such as a wall or a concrete anchor. These restraints provide a physical barrier that prevents the pipe from moving or shifting. 3. Pipe restraints: Pipe restraints are devices that are directly attached to the pipe and anchored to a fixed structure. These restraints can include pipe clamps, pipe restraints, or pipe saddles. They are designed to securely hold the pipe in place and resist any movement or displacement. 4. Pipe bedding and backfill: Proper pipe bedding and backfilling is important for restraining ductile iron pipe. The pipe must be properly supported and surrounded by compacted material to prevent movement or shifting. This method involves carefully placing and compacting soil or other suitable materials around the pipe to provide stability and prevent displacement. 5. Trench walls: The walls of the trench in which the ductile iron pipe is installed can also provide some level of restraint. By properly compacting the soil against the pipe and ensuring proper compaction and stability of the trench walls, the pipe can be effectively restrained and prevented from movement. Overall, the different methods for restraining ductile iron pipe aim to ensure the pipe remains securely in place and does not experience any displacement or movement. The choice of method depends on factors such as the location, application, and the forces acting on the pipe. It is important to consult with engineers and follow industry guidelines and standards to determine the most appropriate method for restraining ductile iron pipe in specific situations.

Q:What is the typical weight of ductile iron pipes?: The typical weight of ductile iron pipes can vary depending on their size and thickness. However, as a general guideline, ductile iron pipes commonly range in weight from around 1 pound per foot for smaller diameter pipes to several hundred pounds per foot for larger diameter pipes. The weight of ductile iron pipes is determined by factors such as the pipe's dimensions, the thickness of its walls, and the specific requirements of the intended application. It is important to note that these weights are approximate and can vary based on the specific manufacturer and product specifications.

Q:How many meters does the cast iron water supply pipe dn150,1 tons?: Reciprocating centrifuge hydraulic device, the pressure was 9.65 x 105Pa. the speed through the overflow valve, cable and cooling water hose is generally fixed on the centrifuge and the machine next to the post, the other end is connected to the shell, random moving together. The production standard of centrifuges is usually fixed. If we want to produce several specifications of pipes on a centrifuge, we need to replace the fan-shaped packages, the hot metal flow plants and the support roller racks.

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