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.
（Ⅰ）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.
（Ⅱ）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.
（Ⅲ）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 GB、GB/T JB、JB/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 9001、ISO 14001、API 6A、API 6D、TS CE、API607/6FA/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 oil and gas pipelines?
- Yes, ductile iron pipes can be used for oil and gas pipelines. Ductile iron is known for its durability, strength, and corrosion resistance, making it suitable for transporting oil and gas. Its high tensile strength and ability to withstand pressure and extreme temperatures make it a reliable choice for these applications.
- Q: Are ductile iron pipes suitable for use in irrigation sprinkler systems?
- Yes, ductile iron pipes are suitable for use in irrigation sprinkler systems. Ductile iron pipes are known for their durability, strength, and corrosion resistance, making them an ideal choice for various applications, including irrigation systems. These pipes have a high tensile strength and can withstand high pressure and heavy loads, which is essential for maintaining a consistent water supply to sprinkler systems. Additionally, ductile iron pipes have a long lifespan, reducing the need for frequent maintenance and replacement, making them a cost-effective option for irrigation systems. Overall, ductile iron pipes are a reliable and suitable choice for use in irrigation sprinkler systems.
- Q: Are ductile iron pipes suitable for desalination plants?
- Yes, ductile iron pipes are suitable for desalination plants. They possess excellent corrosion resistance and durability, making them ideal for transporting seawater and brine solutions commonly found in desalination processes. Additionally, ductile iron pipes have high tensile strength, allowing them to withstand the high pressure and fluctuating temperatures associated with desalination operations.
- Q: What are the different joint types available for ductile iron pipe?
- The different joint types available for ductile iron pipe include push-on joints, mechanical joints, restrained joints, and flanged joints.
- Q: How does ductile iron pipe handle soil movement?
- Ductile iron pipe possesses exceptional strength and durability, making it highly effective in managing soil movement. When the surrounding soil shifts or settles, ductile iron pipes can flex and adapt to this movement without compromising their structural integrity. The ability of ductile iron pipes to handle soil movement stems from their inherent capacity to endure bending and stretching. They have a remarkable level of flexibility, allowing them to adjust to ground shifts and settle without experiencing any breakage or cracks. This flexibility arises from the distinctive material properties of ductile iron, a type of cast iron that has been treated with magnesium to enhance its strength and elasticity. Furthermore, ductile iron pipes are constructed with a thick wall, which enhances their resistance against soil movement. This robust construction assists in distributing the forces exerted by the shifting soil, minimizing the impact on the pipe and preventing significant damage. Moreover, ductile iron pipes are typically installed with suitable bedding and backfill materials to provide additional support and stability. This involves using compacted soil or engineered granular materials around the pipe, which helps evenly distribute the load and reduces the potential for soil movement. Overall, ductile iron pipe is an excellent choice for areas with high soil movement, such as regions with expansive or unstable soils. Its flexibility, strength, and proper installation techniques enable it to effectively handle the challenges presented by soil movement, ensuring long-lasting and dependable performance in various applications.
- Q: Can ductile iron pipes be used for underground drainage systems?
- Yes, ductile iron pipes can be used for underground drainage systems. Ductile iron is a strong and durable material that is resistant to corrosion, making it suitable for use in underground applications. It has a high tensile strength and can withstand heavy loads and pressure, making it ideal for drainage systems that may experience high flow rates or require deep burial depths. Additionally, ductile iron pipes have a long lifespan, reducing the need for frequent maintenance or replacement. Overall, ductile iron pipes are a reliable and efficient choice for underground drainage systems.
- Q: What are the different methods for cutting ductile iron pipe?
- There are several different methods for cutting ductile iron pipe, depending on the specific requirements and constraints of the project. Some common methods include: 1. Manual Cutting: This method involves using a handheld saw or grinder with an abrasive cutting wheel to cut through the ductile iron pipe. It is a simple and relatively inexpensive method, but it can be labor-intensive and time-consuming for larger pipe sizes. 2. Mechanical Cutting: Mechanical cutting methods involve using specialized machinery to cut through the ductile iron pipe. This can include bandsaws, pipe cutters, or hydraulic cutting machines. These machines can provide faster and more precise cuts, especially for larger pipe sizes. However, they can be more expensive and require skilled operators. 3. Torch Cutting: Torch cutting, also known as oxyfuel cutting, involves using a torch to heat the ductile iron pipe and then introducing a high-pressure oxygen stream to create a chemical reaction that cuts through the metal. This method is effective for cutting thick-walled ductile iron pipe, but it can generate a significant amount of heat and sparks, requiring proper safety precautions. 4. Plasma Arc Cutting: Plasma arc cutting utilizes a high-velocity jet of ionized gas (plasma) to melt and cut through the ductile iron pipe. This method is ideal for cutting through thick-walled pipes where precision and efficiency are required. However, it can be more expensive and may require specialized equipment and training. 5. Waterjet Cutting: Waterjet cutting uses a high-pressure jet of water mixed with an abrasive material to cut through the ductile iron pipe. This method is highly precise and does not generate heat or sparks, making it suitable for cutting in sensitive environments. However, it can be slower and more expensive compared to other cutting methods. It is important to consider factors such as pipe size, project requirements, budget, and safety when selecting the appropriate method for cutting ductile iron pipe. Consulting with professionals or experts in the field can help determine the most suitable method for a specific project.
- Q: Are ductile iron pipes resistant to hydrogen sulfide corrosion?
- Yes, ductile iron pipes are generally resistant to hydrogen sulfide corrosion. Ductile iron is a type of cast iron that has been treated with magnesium to create a more flexible and durable material. This treatment significantly enhances its resistance to corrosion, including corrosion caused by hydrogen sulfide. The magnesium in the ductile iron forms a protective layer on the surface, preventing the penetration of hydrogen sulfide and other corrosive agents. However, it is important to note that the resistance of ductile iron pipes to hydrogen sulfide corrosion can still be influenced by factors such as the concentration and duration of exposure to the corrosive environment. Therefore, proper maintenance, regular inspection, and appropriate protective measures should still be implemented to ensure the long-term durability and performance of ductile iron pipes in the presence of hydrogen sulfide.
- Q: What are the different types of joints used in ductile iron pipes?
- There are several types of joints commonly used in ductile iron pipes. These joints are designed to provide a secure and leak-proof connection between pipe sections. Here are some of the most commonly used joint types: 1. Push-on joint: This type of joint is easy to install and requires no special tools. It involves lubricating the gasket on one end of the pipe and pushing it into the socket of the adjoining pipe. The gasket creates a tight seal that prevents leakage. 2. Mechanical joint: This joint type consists of a gland and a follower gasket. The gland is placed over the spigot end of one pipe, and the follower gasket is inserted into the bell end of the adjoining pipe. The gland is then tightened with bolts and nuts, compressing the gasket to form a secure joint. 3. Restrained joint: This joint is used in applications where pipes need to be restrained against axial movement or pressure thrust. It typically involves a mechanical joint with additional components such as tie rods, thrust blocks, or restrained couplings to provide the necessary restraint. 4. Flanged joint: Flanged joints are commonly used in large diameter ductile iron pipes. They involve a flange on one pipe end and a mating flange on the other pipe end. The two flanges are bolted together, creating a strong and secure connection. Flanged joints allow for easy disassembly and reassembly if needed. 5. Welded joint: Welded joints are created by fusing the ends of two pipes together using heat and pressure. This type of joint provides a permanent and strong connection. Welded joints are commonly used in underground or buried applications where long-term durability is essential. It is important to note that the choice of joint type depends on factors such as pipe diameter, application, and project requirements. Consulting with a professional engineer or the manufacturer's guidelines is recommended to ensure the appropriate joint type is selected for ductile iron pipes.
- Q: How do ductile iron pipes compare to PVC pipes?
- Ductile iron pipes are generally stronger and more durable compared to PVC pipes. They have a higher tensile strength and can withstand higher pressure, making them suitable for more demanding applications such as water mains and sewer lines. PVC pipes, on the other hand, are lightweight, easy to install, and resistant to corrosion, making them a popular choice for household plumbing and irrigation systems. Ultimately, the choice between ductile iron and PVC pipes depends on the specific needs and requirements of the project.
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Ductile Iron Pipes with high performance good price
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 m.t
- Supply Capability:
- 1000 m.t/month
OKorder Service Pledge
OKorder Financial Service
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