Ductile Iron Pipes with high performance good price
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- Loading Port:
- Shanghai
- Payment Terms:
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- 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 pipe be used for sewer and wastewater systems?
- Yes, ductile iron pipe can be used for sewer and wastewater systems. Ductile iron is a strong and durable material that can withstand the harsh conditions of sewage and wastewater transport. It has excellent corrosion resistance and can handle high-pressure environments, making it a suitable choice for these applications.
- Q: Can ductile iron pipe be used for industrial wastewater applications?
- Certainly, industrial wastewater applications can make use of ductile iron pipe. Renowned for its robustness, longevity, and corrosion resistance, ductile iron pipe proves itself suitable for a multitude of purposes, including wastewater systems. Its ability to withstand high pressure and endure demanding conditions renders it perfect for industrial wastewater applications that may involve abrasive or corrosive substances. Furthermore, the installation and maintenance of ductile iron pipe are effortless, resulting in reduced costs and guaranteed long-term dependability. Nevertheless, it remains crucial to carefully scrutinize the unique prerequisites of the wastewater application and seek guidance from professionals to ascertain the most fitting pipe material and design.
- Q: The difference between cast iron pipe and ductile iron pipe
- Cast iron pipes, also known as pig iron pipes, ordinary gray iron. Often used in socket connection, the sealing material is usually cement rigid interface.
- Q: Can ductile iron pipes be used in areas with high levels of hydrogen sulfide gas?
- Ductile iron pipes can generally be used in areas with high levels of hydrogen sulfide gas, but it is important to consider certain factors before making a decision. Hydrogen sulfide gas is corrosive and can potentially cause damage to metal pipes over time. While ductile iron is known for its durability and corrosion resistance, prolonged exposure to high levels of hydrogen sulfide gas can still lead to corrosion and deterioration. To mitigate the risks associated with hydrogen sulfide gas, it is advisable to assess the specific conditions of the area beforehand. This includes conducting a comprehensive analysis of the hydrogen sulfide gas concentration, pH levels, temperature, and other factors that may influence corrosion. Consulting with experts or engineering professionals who specialize in corrosion control can provide valuable insights and guidance. In some cases, additional measures may be necessary to protect ductile iron pipes. Coating the interior and exterior surfaces of the pipes with protective materials, such as epoxy or polyethylene, can provide an extra layer of defense against corrosion. Alternatively, cathodic protection systems can be employed to protect the pipes by applying a low voltage electrical current that mitigates the corrosion process. Ultimately, the decision to use ductile iron pipes in areas with high levels of hydrogen sulfide gas should be based on a thorough understanding of the specific conditions and implementing appropriate corrosion prevention measures. Regular monitoring and maintenance should also be conducted to ensure the pipes are functioning optimally and to address any potential issues before they escalate.
- Q: What are the specifications for the installation of water ball iron pipes?
- Groove support: according to the groove soil, groundwater, slotted cross section, load conditions and other factors, the design requirements are firm and reliable, to prevent landslides, support, shall not impede the lower pipe and stable pipe.
- Q: Are ductile iron pipes suitable for use in industrial applications?
- Yes, ductile iron pipes are suitable for use in industrial applications. They have excellent strength and durability, making them ideal for transporting water, chemicals, and other fluids in industrial settings. Ductile iron pipes are also resistant to corrosion, which is crucial for maintaining a long lifespan in industrial environments. Additionally, their flexibility and ease of installation make them a cost-effective choice for industrial applications.
- Q: How do ductile iron pipes handle cyclic loading in offshore applications?
- Ductile iron pipes possess remarkable strength and durability, rendering them suitable for a wide range of applications, including offshore usage. When it comes to dealing with cyclic loading in offshore settings, ductile iron pipes boast various characteristics that contribute to their exceptional performance. To begin with, ductile iron pipes demonstrate a high resistance to fatigue failure. Fatigue failure occurs when a material undergoes repeated stress cycles, leading to the initiation and propagation of cracks over time. Ductile iron pipes are specifically designed to endure cyclic loading without compromising their structural integrity. This is made possible by their inherent ductility and ability to effectively absorb and distribute stress. Furthermore, ductile iron pipes exhibit outstanding impact resistance. Offshore environments are prone to dynamic and unpredictable forces, such as waves and currents, which can exert sudden and intense loads on the pipes. The superior impact resistance of ductile iron allows it to withstand these forces without experiencing deformation or fractures, ensuring that the pipes remain intact and fully functional. Moreover, ductile iron pipes possess a unique microstructure that enables them to resist corrosion. Offshore applications expose pipes to harsh environmental conditions, including saltwater, which can accelerate the corrosion process. However, the protective graphite matrix present in ductile iron pipes acts as a barrier, preventing corrosive agents from reaching the underlying metal. As a result, the service life of the pipes is significantly prolonged. Additionally, ductile iron pipes have a high load-carrying capacity. In offshore applications, pipes often need to support heavy loads, such as those exerted by equipment, structures, or seabed settlements. The exceptional strength of ductile iron enables it to effectively bear these loads, ensuring the structural integrity and stability of the entire system. Lastly, ductile iron pipes offer ease of installation and maintenance. Their lightweight nature makes them easier to handle and transport during offshore operations. Furthermore, their corrosion resistance reduces the need for frequent maintenance, minimizing downtime and reducing the costs associated with repairs and replacements. In conclusion, ductile iron pipes exhibit excellent performance when it comes to handling cyclic loading in offshore applications. Their resistance to fatigue failure, impact resistance, corrosion resistance, high load-carrying capacity, and ease of installation and maintenance make them a dependable and efficient choice for offshore environments.
- Q: Can ductile iron pipes be used in areas with high soil erosion?
- Yes, ductile iron pipes can be used in areas with high soil erosion. Ductile iron is known for its high tensile strength and durability, making it resistant to external forces such as soil erosion. It is a suitable choice for underground piping systems in such areas, providing long-term reliability and stability.
- Q: Can ductile iron pipes be used in coastal or marine environments?
- Yes, ductile iron pipes can be used in coastal or marine environments. Ductile iron has high corrosion resistance and can withstand the harsh conditions found in these areas, including exposure to saltwater and moisture. Additionally, its strength and durability make it suitable for withstanding the impacts of waves and tides. Proper coatings and cathodic protection can further enhance the longevity of ductile iron pipes in coastal or marine environments.
- Q: Can ductile iron pipes be used for marine applications?
- Ductile iron pipes are indeed applicable for marine uses. Renowned for its robustness and durability, ductile iron proves itself suitable for diverse settings, even marine environments. Its remarkable resistance to corrosion empowers it to endure the severe challenges of saltwater exposure. Furthermore, ductile iron pipes have found utility in marine scenarios such as wastewater treatment facilities, desalination plants, and offshore platforms. Nevertheless, it remains crucial to meticulously contemplate appropriate coating and upkeep practices to optimize the lifespan of ductile iron pipes in marine applications.
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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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