| Customization: | Available |
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| Standard: | ANSI, DIN, GB, JIS, GOST, BSW |
| Type: | Welding Flange |
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Structural Features Flange Body: It is usually composed of a circular flange plate and a short section or a flanged edge connected to its edge. There are evenly distributed bolt holes on the flange plate, which are used for connecting with other components. Loose Structure: Different from ordinary flanges, the flange plate of a loose flange can rotate freely on the pipeline instead of being directly welded or fixed to the end of the pipeline. This loose design gives the flange a certain degree of flexibility during installation and use. Material Selection Metal Materials: Commonly used ones include carbon steel, stainless steel, alloy steel, etc. The loose flange made of carbon steel has good strength and economy, and is suitable for general industrial pipelines; the stainless steel material has good corrosion resistance and is often used in fields with high corrosion resistance requirements such as the chemical industry, food industry, and pharmaceutical industry; the alloy steel material can provide higher strength, heat resistance or other special properties according to specific needs. Non-metallic Materials: In some specific situations, such as when insulation, corrosion resistance or strict weight requirements are needed, loose flanges made of non-metallic materials are also used, such as plastic materials like polytetrafluoroethylene and polypropylene. These non-metallic materials have excellent chemical corrosion resistance, insulation properties and low weight, but their strength is relatively low, and they are suitable for some specific pipeline systems carrying low-pressure and corrosive media. Size Specifications The size specifications of loose flanges are usually determined according to the nominal diameter and pressure rating of the connected pipeline. Its nominal diameter ranges from small sizes (such as DN15) to large sizes (such as DN1000 and above), and the pressure ratings cover various different levels from low pressure (such as PN0.6MPa) to high pressure (such as PN16.0MPa and higher). Application Scope Chemical Industry: Due to its good corrosion resistance, loose flanges made of stainless steel or non-metallic materials are often used in pipeline systems for transporting various corrosive chemical media, such as acid, alkali and salt solutions. Food and Beverage Industry: During the production process of food and beverages, it is necessary to ensure the cleanliness and hygiene of the pipeline system. The structure of the loose flange is convenient for disassembly and cleaning, and the stainless steel material meets the food hygiene standards, so it is widely used in the pipeline connections of this industry. Pharmaceutical Industry: Similar to the food industry, the pharmaceutical industry has strict requirements for the cleanliness of the pipeline system and the corrosion resistance of the materials. The loose flange can meet these requirements. At the same time, its flexible installation and disassembly methods also facilitate the maintenance and overhaul of the pipeline system to ensure the quality and safety of the drug production process. Shipbuilding: In various pipeline systems of ships, such as the seawater cooling system and the fuel oil conveying system, loose flanges are applied because of their characteristics such as convenient installation and the ability to adapt to a certain degree of hull deformation. During the navigation of the ship, it will be affected by various external forces, and the hull may undergo a certain degree of deformation. The loose structure of the loose flange can compensate for this deformation to a certain extent, reduce the stress concentration at the pipeline connection, and improve the reliability of the connection. Advantages and Disadvantages Advantages Convenient Installation: For the loose flange, the flange plate can be sleeved on the pipeline first, and then welding or other connection operations can be carried out, avoiding the difficulties of positioning and aligning the flange during the installation process. It is especially suitable for large-diameter pipelines or situations where the on-site installation conditions are relatively complex. It can improve the installation efficiency, reduce the installation time and cost. Can Compensate for Pipeline Displacement: Since the flange plate can rotate relative to the pipeline, when the pipeline undergoes a certain displacement due to thermal expansion and contraction, vibration or other reasons, the loose flange can adapt to this displacement to a certain extent, reduce the stress at the pipeline connection, lower the risk of leakage, and improve the stability and reliability of the pipeline system. Convenient for Maintenance and Replacement: When the pipeline system needs maintenance or component replacement, the loose flange can be easily disassembled without the need for large-scale removal and reinstallation of the entire pipeline, thus saving maintenance time and cost and reducing the impact on the production process. Good Corrosion Resistance: When made of corrosion-resistant materials, the loose flange can maintain good performance in a harsh corrosive environment and extend the service life of the pipeline system. Disadvantages Limited Load-bearing Capacity: Compared with integral flanges, the structure of the loose flange is relatively weak, and its load-bearing capacity is limited. It is generally suitable for medium and low-pressure pipeline systems. In harsh working conditions such as high pressure, high temperature or high vibration, other types of flanges may be required to ensure the safety and reliability of the connection. High Sealing Requirements: Although the loose flange can provide good sealing performance under normal circumstances, due to the characteristics of its loose structure, special attention needs to be paid to the protection of the sealing surface and the installation quality during the installation and use process. Otherwise, it is easy to have the situation of poor sealing, resulting in medium leakage. In addition, during long-term use, factors such as pipeline displacement and vibration may affect the sealing performance, and regular inspection and maintenance are required.
Dingxiang Jinyu Forging Co., Ltd. is located in Dashagou Village, jiangcun Township, Dingxiang County, Xinzhou,known as the "hometown of Chinese forging", with a registered capital of 5 milion yuan. Superior geographical location, 100 kilometers away from the provincial capital Taiyuan, with convenient and fast road and railway transportation. Rich in coal, electricity, and iron resources, we are a professional manufacturer of forged fanges and pressure vessel forgings; We have the ability to integrate design, raw material procurement, cutting, forging, heat treatment, machining, mechanical testing, non-destructive testing, mechanical typing, painting, packaging, and shipping operations. The annual production capacity is over 10000 tons, with specifications ranging from DN15 to DN6000mm. The maximum weight per unit of finished products is 20 tons, and the pressure ranges from 150-2500 pounds, including national standards, American standards, British standards, German standards, Japanese standards,and non-standard fanges and forgings.
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