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 be welded? Is weldability comparable to gray iron?
- The tensile strength of more than or equal to 70000 PSI (more than 482 n / mm2) yield strength: General 62000 (more than 427 n / mm2)Hardness (HB): 185HBWith the parent material color: similar power options: AC and DC dual-use, DC DC reverse connection
- Q:Can ductile iron pipe be used for road and highway crossings?
- Ductile iron pipe is indeed suitable for road and highway crossings. This material, known for its strength and durability, is ideal for underground infrastructure projects like road and highway crossings. Its remarkable ability to withstand heavy loads, corrosion, and external forces makes it the perfect choice for enduring the traffic and environmental conditions commonly encountered in road and highway crossings. Moreover, ductile iron pipe comes in different sizes and strengths, offering customization options to meet the specific needs of the crossing. To maximize the longevity and performance of ductile iron pipes in road and highway crossings, it is crucial to follow proper installation techniques and adhere to relevant industry standards.
- Q:What is the purpose of ductile iron pipes?
- The purpose of ductile iron pipes is to provide a reliable and durable infrastructure for the transportation of fluids, such as water, sewage, and gas. Ductile iron pipes offer significant advantages over other materials such as steel or PVC pipes. One primary purpose is to ensure the safe and efficient supply of water to communities. Ductile iron pipes are designed to withstand high pressures and can handle the harsh conditions of underground environments, making them ideal for water distribution systems. They have a long service life and require minimal maintenance, reducing the need for frequent repairs or replacements. Another purpose is to effectively transport sewage and wastewater. Ductile iron pipes have excellent corrosion resistance, ensuring that they can withstand the corrosive nature of sewage and other waste materials. They are also structurally strong, capable of withstanding heavy loads and ground movements, making them suitable for underground sewer systems. Ductile iron pipes are also utilized for the transportation of gas. They have excellent mechanical properties and can withstand high-pressure applications, making them ideal for gas distribution networks. Additionally, their durability and resistance to external factors like soil movement or temperature changes make them a reliable choice for gas transmission systems. Overall, the purpose of ductile iron pipes is to provide a robust and long-lasting solution for the safe and efficient transportation of fluids, contributing to the development and maintenance of essential infrastructure systems that support our communities' needs.
- Q:How do ductile iron pipes handle soil movement?
- Ductile iron pipes are renowned for their exceptional strength and durability, rendering them highly adept at managing soil movement. These pipes are engineered to withstand the external loads and pressures arising from soil settlement, ground shifting, or other environmental elements. A significant characteristic of ductile iron pipes lies in their flexibility. Unlike inflexible materials such as cast iron or concrete pipes, ductile iron pipes possess a certain degree of elasticity, enabling them to endure soil movement without succumbing to cracks or fractures. This flexibility empowers the pipes to absorb the stresses imposed by the soil, effectively preventing any substantial harm to the pipeline system. Furthermore, ductile iron pipes exhibit remarkable tensile strength, allowing them to resist the pulling forces that arise from soil movement. The pipes can endure the expansion and contraction of the surrounding soil, thereby diminishing the likelihood of pipe deformation or failure. Additionally, ductile iron pipes are frequently installed using proper bedding and backfilling techniques to further enhance their capacity to handle soil movement. Adequate bedding materials, such as crushed stone or sand, are utilized to deliver stable support to the pipes and distribute the external loads uniformly. This serves to minimize the impact of soil movement on the pipes and uphold their structural integrity. In conclusion, ductile iron pipes are purposefully designed to proficiently manage soil movement by virtue of their flexibility, high tensile strength, and appropriate installation methods. These pipes can effectively endure the stresses generated by soil settlement, ground shifting, or other soil-related factors, ensuring dependable and long-lasting performance in a variety of environmental conditions.
- Q:Are ductile iron pipes resistant to environmental stress cracking?
- Yes, ductile iron pipes are resistant to environmental stress cracking. Ductile iron is a type of cast iron that has been treated with trace amounts of magnesium to improve its strength and ductility. This treatment makes ductile iron pipes highly resistant to cracking and damage caused by environmental stressors such as temperature fluctuations, soil movement, and corrosive elements in the surrounding environment. Additionally, the inherent strength and flexibility of ductile iron allow it to withstand high levels of external pressure and stress without cracking or failing. Overall, ductile iron pipes are a durable and reliable choice for various applications, including water and wastewater transportation, due to their resistance to environmental stress cracking.
- Q:Are ductile iron pipes resistant to abrasion?
- Yes, ductile iron pipes are highly resistant to abrasion.
- Q:How does ductile iron pipe perform in seismic conditions?
- Ductile iron pipe has excellent performance in seismic conditions due to its inherent flexibility and strength. It can withstand ground movements and vibrations caused by earthquakes without fracturing or breaking. Its ability to absorb and dissipate energy helps prevent catastrophic failures and ensures the integrity of the pipeline system. Additionally, ductile iron pipe's corrosion resistance and durability make it a reliable choice for long-term performance in seismic-prone areas.
- Q:Are ductile iron pipes suitable for installation in areas with high soil settlement and consolidation?
- Ductile iron pipes are commonly used in areas where there is significant soil settlement and consolidation. One of the main advantages of these pipes is their ability to withstand external loads and accommodate ground movement. Compared to other pipe materials, ductile iron pipes are known for their strength and flexibility, making them more resistant to soil settlement and consolidation. They have a higher tensile strength and can withstand heavy loads and ground vibrations without cracking or breaking. This makes them suitable for areas with soil prone to settlement and consolidation. Moreover, ductile iron pipes have a high resistance to corrosion and can withstand aggressive soil conditions, which are often found in areas prone to settlement and consolidation. They are also less likely to be damaged by external factors such as roots or rocks, making them even more suitable for installation in such areas. However, it is important to consider the specific conditions of the site and consult with engineers or experts who are familiar with the local soil conditions. Factors such as the magnitude and rate of settlement, soil type, groundwater levels, and construction methods should be taken into account when determining whether ductile iron pipes are appropriate for installation in areas with high soil settlement and consolidation. In conclusion, ductile iron pipes are generally a suitable choice for installation in areas with high soil settlement and consolidation. Their strength, flexibility, resistance to corrosion, and ability to withstand external loads make them a reliable option for these conditions. Nevertheless, it is always recommended to assess the specific site conditions and consult with professionals to ensure the most appropriate pipe material is selected for each project.
- Q:Can centrifugal cast iron pipe be galvanized or coated with asphalt which is good for corrosion prevention?
- By spraying zinc and epoxy coal tar coating of ductile iron pipe wall (or epoxy resin paint, polyurethane, etc.) wall using Portland cement (or epoxy powder, epoxy, polyurethane, ceramics etc.) wall coating can effectively active substances in soil and the formation of an insoluble zinc salt protection tube, the internal coating can inhibit corrosion of pipe body fluid medium.
- Q:What are the typical surge anticipation measures for ductile iron pipe?
- To mitigate potential damage caused by surges or water hammer in ductile iron pipe systems, various techniques can be employed. These measures aim to absorb or redirect sudden pressure changes, preventing pipe rupture or failure. Common surge anticipation measures for ductile iron pipe include: 1. Incorporating air chambers strategically along the pipeline to create a cushion of air that absorbs surge energy. As the pressure wave travels through the pipe, the air compresses, reducing the impact on the pipe and minimizing the risk of damage. 2. Connecting surge tanks, which act as storage reservoirs for excess pressure, to the pipeline. When a surge occurs, the surge tank absorbs the excess water volume, preventing damage to the pipe. The stored water is gradually released back into the system, stabilizing the pressure. 3. Installing surge relief valves in the pipeline to automatically release excess pressure during surge events. These valves open when the pressure exceeds a preset limit, allowing the surge to dissipate harmlessly. Surge relief valves can be adjusted to release the desired amount of pressure, ensuring the safety of the ductile iron pipe. 4. Utilizing water hammer arrestors, which are devices that absorb the shock generated by surges and water hammer. These devices consist of sealed chambers filled with a compressible gas or liquid that absorbs sudden pressure changes. By absorbing the energy, water hammer arrestors protect the ductile iron pipe from potential damage. 5. Using surge suppressors, devices that regulate the flow of water during surge events. Surge suppressors are designed to reduce the speed at which surges travel through the pipe, minimizing the impact on the system. These devices can be installed at critical points in the pipeline to prevent damage to the ductile iron pipe. To determine the most suitable surge anticipation measures for ductile iron pipe installations, it is important to consider the specific requirements of the pipeline system and consult experienced engineers or industry professionals.
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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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