Ductile Iron Pipe Double Flange Short Pipe
1. Definition
The Ductile Iron Pipe Double Flange Short Pipe is a specialized piping component used in pipeline systems. As the name indicates, it is characterized by having two flanges at both ends and is relatively short in length compared to standard pipes. This short - length design, combined with the double - flange structure, serves specific connection and adjustment purposes within the pipeline network. It acts as a crucial link to join different sections of pipelines, valves, pumps, or other equipment that are equipped with flanges, enabling a secure and efficient connection.
2. Structural Features
2.1 Flange Design
The most prominent feature of the double - flange short pipe is its two flanges. These flanges are integral parts of the pipe structure, usually cast in one piece with the pipe body. The flanges are circular in shape and have a series of bolt - holes evenly distributed around their circumference. The number and size of these bolt - holes are standardized according to relevant industry standards, such as ANSI (American National Standards Institute), DIN (Deutsches Institut für Normung), or ISO (International Organization for Standardization). This standardization ensures compatibility with other flanged components in the pipeline system.
The surface of the flanges that comes into contact with the mating flanges is machined to a smooth finish. This smooth surface helps to create a tight seal when the flanges are bolted together, preventing leakage of the fluid or gas flowing through the pipeline. Additionally, the flanges are designed with a certain thickness to withstand the forces exerted during the connection process and the internal pressure of the pipeline.
2.2 Pipe Body
The pipe body of the double - flange short pipe is made of high - quality ductile iron. Ductile iron is a type of cast iron that contains graphite in a nodular or spherical form, which gives it enhanced mechanical properties compared to traditional gray iron. The pipe body has a cylindrical shape with a uniform inner diameter. The inner surface of the pipe is smooth to minimize friction losses during fluid flow. The outer surface of the pipe body may have a protective coating, which not only protects the ductile iron from corrosion but also provides some level of abrasion resistance.
The length of the double - flange short pipe is typically shorter than regular pipes, usually ranging from a few inches to a few feet, depending on the specific application requirements. This short - length design allows for easy adjustment of the pipeline length and alignment, especially in situations where precise positioning of components is required.
3. Manufacturing Process
3.1 Raw Material Selection
The production of ductile iron pipe double - flange short pipes starts with the careful selection of raw materials. High - quality pig iron, scrap iron, and alloying elements are the main ingredients. Pig iron provides the base iron content, while scrap iron can be recycled and incorporated into the mix to reduce costs. Alloying elements such as magnesium and cerium are added during the melting process. Magnesium is particularly important as it promotes the formation of nodular graphite in the iron, which is the key characteristic of ductile iron.
3.2 Melting and Treatment
The selected raw materials are melted in a furnace, commonly an electric arc furnace or a cupola furnace. The melting process requires precise control of temperature and chemical composition. Once the iron is in a molten state, it is treated with a magnesium - based inoculant to transform the graphite structure into nodules. This treatment significantly improves the mechanical properties of the iron, such as ductility, strength, and toughness.
3.3 Casting
After the molten iron has been properly treated, it is poured into a pre - made mold. The mold is designed to create the shape of the double - flange short pipe, including the pipe body and the two flanges. During the casting process, factors such as pouring speed, temperature, and mold vibration are carefully controlled to ensure the quality of the casting. The molten iron is allowed to cool and solidify in the mold, forming the basic shape of the double - flange short pipe.
3.4 Machining and Finishing
Once the casting is removed from the mold, it undergoes machining operations. The inner and outer diameters of the pipe body are machined to the required tolerances. The surfaces of the flanges, especially the gasket - contacting surfaces and the bolt - hole areas, are precisely machined to ensure a proper fit with other flanged components. After machining, the double - flange short pipe is finished with a surface treatment. This may include sandblasting to remove any scale or impurities, followed by painting or coating. The coating can be a variety of materials, such as epoxy, zinc - based paints, or polyethylene, depending on the intended application environment.
4. Performance Advantages
4.1 High Strength and Pressure Resistance
The use of ductile iron in the manufacturing of the double - flange short pipe gives it high tensile strength. This enables the pipe to withstand significant internal pressure from the fluid or gas flowing through the pipeline. It can be used in high - pressure applications, such as water supply systems with elevated water towers, oil and gas transportation pipelines, and industrial process pipelines where high - pressure fluids are involved. The high strength also ensures that the pipe can resist external forces, such as soil pressure in buried pipelines or the weight of overlying structures.
4.2 Good Corrosion Resistance
The ductile iron pipe, combined with the surface coating, provides excellent corrosion resistance. Ductile iron itself has a certain level of corrosion resistance due to its chemical composition. The additional coating further enhances this property, protecting the pipe from corrosion caused by various environmental factors. In water supply systems, it can resist the corrosion of water, which may contain dissolved oxygen, minerals, and other substances. In sewage or industrial waste pipelines, it can withstand the corrosive effects of acidic or alkaline fluids.
4.3 Easy Installation
The double - flange design of the short pipe makes installation relatively straightforward. By simply aligning the bolt - holes of the flanges with those of the mating components and tightening the bolts, a secure connection can be achieved. This method of connection does not require specialized welding skills or equipment, reducing the installation time and cost. Moreover, the short - length design allows for easy handling and positioning during installation, especially in tight spaces or complex pipeline layouts.
5. Application Scenarios
5.1 Water Supply and Distribution Systems
In urban water supply systems, double - flange short pipes are used to connect different sections of the main water pipelines, as well as to connect valves, hydrants, and water meters. The high - pressure resistance and corrosion - resistance properties ensure a reliable water supply. In large - scale water treatment plants, they are used to connect various treatment units, enabling the smooth flow of water during the treatment process.
5.2 Sewage and Drainage Systems
For sewage and drainage systems, these short pipes are used to connect different parts of the sewer network, including manholes, pumping stations, and treatment facilities. The corrosion - resistance of the ductile iron and the easy - to - install flange connection make it suitable for handling sewage, which may contain corrosive substances and solid waste.
5.3 Industrial Pipelines
In industrial settings, such as chemical plants, power plants, and refineries, double - flange short pipes are used to connect different pieces of equipment, such as pumps, compressors, and heat exchangers. They can handle a wide range of industrial fluids, including chemicals, steam, and oil. The high - strength and pressure - resistance properties are essential in these applications, as industrial processes often involve high - pressure and high - temperature fluids.
5.4 Fire - Fighting Systems
In fire - fighting systems, double - flange short pipes are used to connect fire hydrants, sprinkler systems, and water storage tanks. The high - pressure resistance of the pipe ensures that it can deliver a sufficient amount of water at the required pressure during a fire emergency. The corrosion - resistance property is also important, as the pipes may be exposed to moisture and other environmental factors when not in use.
6. Installation Precautions
6.1 Flange Alignment
Before installing the double - flange short pipe, it is crucial to ensure accurate alignment of the flanges. The bolt - holes of the short - pipe flanges must be precisely aligned with those of the mating components. Any misalignment can lead to uneven stress distribution when the bolts are tightened, which may cause leakage or damage to the flanges.
6.2 Gasket Selection and Installation
The selection of the appropriate gasket is essential for a leak - free connection. The gasket material should be compatible with the fluid or gas flowing through the pipeline and the operating temperature and pressure conditions. When installing the gasket, it should be placed evenly between the two flanges, covering all the bolt - holes and the inner circumference of the flanges. Care should be taken not to damage the gasket during the installation process.
6.3 Bolt Tightening
The bolts used to connect the flanges should be tightened in a specific sequence and to the recommended torque value. This ensures that the flanges are evenly compressed and that the gasket forms a proper seal. Over - tightening or under - tightening the bolts can result in leakage or damage to the flanges and the gasket. A torque wrench should be used to ensure accurate tightening.
In conclusion, the Ductile Iron Pipe Double Flange Short Pipe is a vital component in pipeline systems. Its unique structure, excellent manufacturing process, and numerous performance advantages make it suitable for a wide range of applications. By following the proper installation precautions, it can provide a long - lasting and reliable connection in various pipeline networks.
| Specification |
Weight(KG) |
| 80 |
9 |
| 100 |
11.9 |
| 125 |
14.4 |
| 150 |
21.4 |
| 200 |
34.2 |
| 250 |
54.1 |
| 300 |
69.6 |
| 350 |
99.7 |
| 400 |
130 |
| 450 |
165 |
| 500 |
205 |
| 600 |
301 |
| 700 |
436 |
| 800 |
595 |
| 900 |
793 |
| 1000 |
986 |
| 1200 |
1624 |
| 1400 |
2419 |
| 1600 |
2887 |
Q1: Are you trading company or manufacturer ?
A1: We are factory.
Q2:Can I go to your factory to visit?
A2:Of course, we welcome customers from all over the world to visit our factory.
Q3: How long is your delivery time?
A3: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to
quantity.
Q4:What is the advantage about your company?
A4:Our company has professional team and professional production line.
Q5: The logo and the color can be customized?
A5: Yes, we welcome you to sample custom
Q6: Any other good service your company can provide?
A6:Yes,we can provide good after-sale and fast delivery.
Q7:What product information do I need to provide?
A7:You need to provide the grade, width, thickness, coating and the number of tons you need to purchase.
Q8:Does the product have quality inspection before loading?
A8:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.we accept the third party inspection absolutely.
Factory Introduction
We are a specialized ductile iron pipe manufacturing factory based in Shanxi, China. With a rich heritage of over 20 years in this industry, we have established ourselves as a reliable and experienced player in the global market.
Our ductile iron pipes have found their way to numerous countries across the globe. This wide - reaching export network is a testament to the trust that our international customers place in our products. The quality of our pipes has been recognized and praised by various sectors. We adhere to strict international quality standards, and our production facilities are equipped with state - of - the - art technology to ensure precision and consistency.
Each batch of our products undergoes rigorous quality control checks. We conduct comprehensive tests on factors such as pipe strength, pressure - bearing capacity, and corrosion resistance. This meticulous approach to quality control has earned us a reputation for delivering products that are not only durable but also perform optimally in diverse applications, whether it's for water supply, gas transmission, or other infrastructure projects.
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