• Ductile Iron Pipes with high performance good price System 1
  • Ductile Iron Pipes with high performance good price System 2
Ductile Iron Pipes with high performance good price

Ductile Iron Pipes with high performance good price

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Loading Port:
Shanghai
Payment Terms:
TT OR LC
Min Order Qty:
100 m.t
Supply Capability:
1000 m.t/month

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full welded forged steel ball valve

Design Features of full welded forged steel ball valve

The body of ball valve is full welded,selects high quality forged material,and adopts the advanced forged forming technology to form two semi-spheres which are welded into a whole in the middle of the body.This welding technology differentiates the ball valve form others,and makes the valve more spherically,so the valve structure is more compacter,lighter and stronger.Besides,the middle direct welding realize highly accurate valve body manufacturing,makes fully and completely sealing between the seat and ball.The full welding instead of bolts completely avoids the outside leakage,so ball valve is the ideal product for under-ground,offshore working platform and under-sea equipments.

Adopting fixed plates or trunnion to support the ball

The top and bottom of the ball is supported by upper and lower fixed plates or stem and trunnion,and the ball is accurately placed in the center of the ball valve to achieve complete seals and precise movements.When plate adopted,the force exerted by the medium to the ball is distributed via the plate to the left and right bodies,so that the stem does not bear the blending moment from the medium,but only the torque from the ball rotation during the opening/closing of the valve.The low-friction PTFE Teflon composite bearings installed between the ball axis and fixed plate and between the stem and the trunnion can absorb ball moving action caused by the pressure of the medium.This structure brings stable actions and easy operations for the ball valves,and the required operation torque can be reduced,so smaller actuators can be used,and the cost is cut down.

ball valve seat is floating structure,means the seat can move along the medium direction,so that the seat can fit against the ball all the time.
Double piston effect structure seat of full welded forged steel ball valve
Seat design is special double pistons effect structure,it can ensure the seal wherever the medium flows into the ball valve.



Seat multistage seal strucute of full welded forged steel ball valve
As following graphic instruction,on seat bearing ring,set two soft sealing rings(A and B)and metal sealing spherical surface which can seal with the ball.Seat ring A is spring loaded,which seals the surface with the ball tightly to the surface to form an initial seat;When there is pressure generated from medium,the piston force is generated to make seal ring A elastically deformed and seal ring B fit the surface of the ball surface due to the piston effect caused by area difference,thus the second seal forms.When the medium pressure is rising.It will generate huge pressure to seal ring A and seal ring B,so the two seals have a greater elastic deformation,then metal seal ball surface compact with ball surface to form the third level of metal to metal seal.


Secondary seat seal device of full welded forged steel ball valve
As the above graphic instruction,the secondary seal device(seat grease injection valve)can be chosen according to the actual working condition,medium requirement,seal requirement,etc.Seat ring grease injection valve is a one-way valve,installed on the body,which can prevent the leakage and inject grease under the outside force.When secondary seal is required,there is a grease injecting channel and hole on the seat ring.The grease can form a seal between the seat and the ball,and then stop the leakage.


Standards Applied of full welded forged steel ball valve

Design   Standard

 API   6D customize 

Connection   Standard

 ASME   B 16.25-2007  ASME B 16.5  ASME B 31.4  ASME B   31.8  DIN  GBGB/T  JBJB/T JIS customize   

Test   Standard

 API   6D customize 

Face   to Face

 API   6D customize 

Pressure-teperature   rating

 ASME   B 16.34-2004 customize 

Marking

 MSS   SP-25 customize 

FAQ of full welded forged steel ball valve:

Q1:I can’t find the type of steel check valve which I need. what can I do?

The chart above only lists out some common composition of steel check valve parts.We may provide other different parts material composition according to the customer's request or the actual valve working condition.

 

Q2:Which certification do your products pass?

  Our products are in accordance with ISO 9001ISO 14001API 6AAPI 6DTS CEAPI607/6FA/BS6755.

 

Q3:How can I place an order?

  The only one thing you should do is to tell us the sepecification about type quantity and  mode of transportation, then we will send you quotation within 24 hours.


Q:Can ductile iron pipes be used for underground hydropower systems?
Yes, ductile iron pipes can be used for underground hydropower systems. Ductile iron is known for its strength, durability, and corrosion resistance, making it suitable for underground applications where water and soil conditions may vary. Additionally, ductile iron pipes have the ability to withstand high pressure and can handle the weight of the surrounding soil, making them a reliable choice for underground hydropower systems.
Q:Can cast iron pipes not be used for domestic water supply and drainage?
Yes, the main use is, outdoor water supply pipe can be PE or ductile iron (socket connection). Indoor water is now used in general plastic pipes, but in the past seems to be able to use ductile iron, as for drainage, generally do pressure type drainage, when the choice is cast iron pipe. There are also indoor fire pipes using welded steel tubes or ductile iron.
Q:Can ductile iron pipes be used for large-scale irrigation systems?
Yes, ductile iron pipes can be used for large-scale irrigation systems. Ductile iron pipes are known for their strength, durability, and corrosion resistance, making them suitable for various applications, including irrigation. They can handle high-pressure water flow and provide long-lasting performance, making them a reliable choice for large-scale irrigation systems.
Q:What are some common applications for ductile iron pipe?
Ductile iron pipe, known as DI pipe, is extensively utilized in a variety of applications because of its durability, strength, and ability to resist corrosion. The following are some common uses of ductile iron pipe: 1. Water Distribution: DI pipe is widely employed in the distribution of clean water. Its high tensile strength enables it to withstand high water pressure, making it perfect for water mains, water transmission lines, and water distribution networks. 2. Sewer Systems: DI pipe is commonly utilized in sewer systems because of its corrosion resistance and ability to handle heavy loads. It is often used for gravity sewer lines, force mains, and stormwater systems. 3. Industrial Applications: DI pipe is used in various industrial settings, such as power plants, chemical plants, and refineries. It is utilized for the transportation of water, wastewater, and other fluids in these industries. 4. Irrigation Systems: Due to its strength and long lifespan, DI pipe is suitable for irrigation systems, particularly in agricultural areas. It is used to transport water for irrigation purposes, ensuring efficient water distribution in fields and farms. 5. Fire Protection Systems: DI pipe is commonly employed in fire protection systems, including fire hydrants, fire sprinkler systems, and fire suppression systems. Its robustness and ability to withstand high pressure make it an excellent choice for reliable and effective fire protection. 6. Pumping Stations: DI pipe is frequently utilized in pumping stations, which are crucial for various water-related applications. It is used in water intake systems, wastewater pumping stations, and water treatment plants to efficiently transport water and wastewater. 7. Municipal Infrastructure: DI pipe is widely used in municipal infrastructure projects, such as road drainage systems, culverts, and bridge crossings. Its strength, durability, and ability to withstand external loads make it suitable for these applications. 8. Gas Distribution: Although primarily used for water-related applications, DI pipe is also utilized for the distribution of natural gas and other gases. It is preferred for gas distribution due to its resistance to corrosion and ability to withstand high-pressure environments. In conclusion, ductile iron pipe has a wide range of applications and is preferred in situations that require strength, durability, and resistance to corrosion. Its versatility and reliability make it a popular choice for various infrastructure projects and industrial applications.
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.
Q:What are the different methods for tapping ductile iron pipe?
There are several different methods for tapping ductile iron pipe, depending on the specific requirements of the project. Some of the common methods used include: 1. Mechanical Tapping: This method involves using a mechanical tapping machine to create a hole in the ductile iron pipe. The machine is equipped with a cutting tool that rotates and cuts through the pipe wall, creating a clean hole. This method is commonly used for smaller diameter pipes and is relatively quick and efficient. 2. Hot Tapping: Hot tapping involves creating a hole in a pressurized ductile iron pipe while it is still in service. This method requires specialized equipment and expertise to ensure safety and maintain the integrity of the pipe. Hot tapping is commonly used when it is not feasible or practical to shut down the pipeline for maintenance or repair work. 3. Electrofusion Tapping: Electrofusion tapping is a method that uses an electrofusion saddle and fitting to create a branch connection on a ductile iron pipe. This method involves welding a fitting onto the pipe using an electrofusion machine, which creates a secure and leak-proof connection. Electrofusion tapping is commonly used for larger diameter pipes and is suitable for both water and gas applications. 4. Saddle Tapping: Saddle tapping involves attaching a saddle or clamp onto the ductile iron pipe and drilling a hole through the saddle into the pipe. The saddle is then equipped with a threaded outlet for connecting a branch line. This method is commonly used for smaller diameter pipes and is relatively simple and cost-effective. 5. Split Sleeve Tapping: Split sleeve tapping is a method that involves cutting a section out of the ductile iron pipe and installing a split sleeve over the cut. The split sleeve is then bolted together, creating a secure and watertight connection. This method is commonly used for larger diameter pipes and is suitable for both water and gas applications. It is important to note that the selection of the tapping method should be based on factors such as the pipe size, pressure rating, required branch connection, and the specific requirements of the project. Consulting with a professional engineer or tapping specialist is recommended to ensure the proper method is used for tapping ductile iron pipe.
Q:Are ductile iron pipes suitable for use in brewery facilities?
Yes, ductile iron pipes are suitable for use in brewery facilities. Ductile iron pipes are durable, corrosion-resistant, and can withstand high-pressure applications, making them ideal for transporting water, steam, and other fluids within brewery facilities. Additionally, the smooth interior surface of ductile iron pipes minimizes friction and prevents the build-up of sediments or organic materials, ensuring the purity and quality of the beer being produced.
Q:Are ductile iron pipes suitable for use in chemical processing plants?
Yes, ductile iron pipes are suitable for use in chemical processing plants. Ductile iron is a type of cast iron that has enhanced mechanical properties, making it highly resistant to corrosion and suitable for handling various chemicals in industrial settings. It is known for its high tensile strength, durability, and flexibility, allowing it to withstand the high-pressure and temperature conditions often present in chemical processing plants. Additionally, ductile iron pipes have a smooth internal surface, which helps to minimize friction and reduce the risk of flow blockages or contamination. Overall, ductile iron pipes offer a reliable and cost-effective solution for transporting chemicals in chemical processing plants.
Q:Can ductile iron pipe be used for hot water applications?
Indeed, hot water applications can make use of ductile iron pipe. Renowned for its robustness, longevity, and exceptional resistance to corrosion, ductile iron pipe proves itself ideal for diverse applications, including hot water systems. Its capability to withstand high temperatures and pressure renders it a dependable choice for the conveyance of hot water. Moreover, its thermal conductivity properties facilitate efficient heat transfer, guaranteeing the effective delivery of hot water throughout the system. Consequently, when evaluating materials for hot water applications, ductile iron pipe emerges as a fitting alternative.
Q:How do ductile iron pipes perform in sandy soil conditions?
Ductile iron pipes perform well in sandy soil conditions due to their inherent strength and durability. The material's high tensile strength allows it to withstand the pressure exerted by the surrounding soil, preventing pipe deformation and breakage. Additionally, the corrosion resistance of ductile iron ensures a longer lifespan, even in corrosive sandy soil environments.

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