Flanges are the interconnected parts between shafts and are used for the connection between pipe ends; they are also used for flanges on the inlet and outlet of equipment for the connection between two equipment. The flange connection or flange joint refers to a detachable connection in which flanges, gaskets, and bolts are connected to each other as a set of combined sealing structures.
Pipe flange refers to the flange used in the pipe equipment. The flanges have holes and the bolts to close the two flanges. The flanges are sealed with liners. Flanges are classified as the thread connection (wire buckle connection) flange, the welded flange and the clamp flange. Flange thickness is different according to different pressure, the bolts are also different.
Flange (flange) connection is first to put two pipes, pipe fittings or equipment fixed on two flanges, second to add a flange pad between two flanges, then fasten together with bolts to complete the connection. Some pipe fittings and equipment have their own flange plate. Flange connection is an important connection mode for pipeline construction. Flange connection is easy to use and affordable. In industrial pipes, within the home, the pipes are small in diameter and low pressure, there is no flange connection. But if in a boiler room or its production site, there are flange connected pipes and equipment.
In a word, flanges are widely used in industry connections. Are you looking for flanges which are economical and high performance? Nickel and nickel-base alloy clad steel flange, stainless steel clad flange, Titanium steel clad flange, etc are for your choices. Gallianz are able to provide you professional clad flanges for your special use.
Corrosion Resistance: The cladding material, often made from stainless steel, nickel alloys, or other corrosion-resistant metals, protects the flange from corrosive environments, which is crucial in industries like chemical processing, oil and gas, and marine applications.
Cost-Effectiveness: While the cladding material itself might be expensive, clad flanges are more economical overall compared to solid flanges made entirely from corrosion-resistant materials. This is because only a thin layer of the costly material is used.
Durability and Longevity: The combination of a robust base material (typically carbon or low-alloy steel) with a corrosion-resistant surface layer ensures a longer service life and reduces maintenance needs.
Mechanical Strength: Clad flanges retain the high mechanical strength of the base material, allowing them to withstand high pressure and mechanical stress while benefiting from the corrosion resistance of the cladding.
Versatility: These flanges can be used in a wide range of applications, including pipelines, pressure vessels, and heat exchangers, due to their adaptability to different environments and conditions.
Quality and Safety: The bonding process between the base material and the cladding is highly controlled, ensuring a consistent quality and integrity of the clad layer, which is critical for safe operation in high-stress environments.
Compliance with Standards: Clad flanges are manufactured to meet stringent industry standards (such as ASME, ASTM, and API), ensuring they meet the necessary specifications for safety, reliability, and performance.
Resistance to Wear and Tear: The cladding layer also provides resistance to wear and tear, which is beneficial in applications where the flange is exposed to abrasive substances or high-velocity fluids.
| Feature | Specification |
| Flange Type | All standard flange types (Weld Neck, Slip-On, Blind, etc.) as per ASME B16.5 or B16.47 |
| Base Material | * Carbon Steel (SA 105, SA 216, etc.) * Low Alloy Steel |
| Cladding Material | * Stainless Steel (304, 316L, etc.) * Nickel Alloys (Inconel, Hastelloy) * Other Corrosion Resistant Alloys (depending on application) |
| Cladding Thickness | Typically 3 mm to 12 mm |
| Cladding Method | * Weld Overlay * Explosion Bonding |
| Pressure Rating | Same as equivalent un-clad flange rating (ASME B16.5 or B16.47) |
| Temperature Rating | Determined by base material and cladding material properties |
| Applications | * High pressure and high temperature service * Corrosive environments * Applications requiring special properties (e.g., wear resistance) |
| Standards | * Manufacturing typically follows ASME B16.5 or B16.47 for dimensions * Material specifications based on relevant ASTM standards (e.g., ASTM B898 for Titanium cladding) |
Oil and Gas Industry: Cladding flanges are extensively used in pipelines, refineries, and offshore platforms where they are exposed to corrosive substances like hydrogen sulfide, carbon dioxide, and chlorides.
Chemical and Petrochemical Industry: These cladding flanges are ideal for environments that handle aggressive chemicals, acids, and other corrosive materials. They are used in reactors, storage tanks, and process piping systems.
Power Generation: In power plants, clad flanges are used in high-temperature and high-pressure applications, such as steam turbines and boilers, where resistance to heat and corrosion is critical.
Marine and Shipbuilding: The marine environment is highly corrosive due to saltwater. Clad flanges are used in shipbuilding and offshore structures to ensure longevity and reliability in harsh conditions.
Water Treatment and Desalination: Clad flanges are used in desalination plants and water treatment facilities where they come into contact with saltwater and other corrosive agents.
Pharmaceutical Industry: In pharmaceutical manufacturing, clad flanges are used in process piping systems that require high purity and resistance to contamination.
Food and Beverage Industry: These flanges are used in processing equipment where hygienic conditions and resistance to corrosion from various food products and cleaning agents are necessary.
Nuclear Industry: Clad flanges are used in nuclear power plants due to their ability to withstand high temperatures, radiation, and corrosive environments, ensuring safe and reliable operation.
Mining and Mineral Processing: The mining industry uses clad flanges in equipment that handles abrasive and corrosive materials, such as slurry pipelines and processing vessels.
Pulp and Paper Industry: In the pulp and paper industry, clad flanges are used in bleaching plants and other processing areas where chemicals are used, and corrosion resistance is crucial.
Clad flanges are used to enhance the corrosion resistance of flanges in pipelines and other industrial systems, extending their service life and reducing maintenance costs. They are particularly beneficial in environments with aggressive chemicals, high temperatures, and pressures.
Common materials for the cladding layer include:
· Stainless steel (e.g., 304, 316)
· Nickel alloys (e.g., Inconel, Hastelloy)
· Copper-nickel alloys
· Titanium
Clad flanges are typically manufactured through one of the following methods:
· Explosion bonding: High energy from an explosion bonds the clad material to the base metal.
· Roll bonding: Pressure and heat are used to bond the materials as they pass through rollers.
· Weld overlay: The clad material is welded onto the base metal surface.
· Corrosion resistance: Protects against harsh chemicals and environments.
· Cost-effective: Uses less expensive base metal with a thin layer of expensive CRA.
· Strength and durability: Combines the mechanical strength of the base metal with the protective properties of the CRA.
Clad flanges offer a cost-effective alternative to solid alloy flanges. They provide similar corrosion resistance but at a lower cost due to the use of a less expensive base metal. However, for extremely corrosive environments, solid alloy flanges might still be preferred.
Clad flanges are typically manufactured to meet various industry standards, including:
· ASME (American Society of Mechanical Engineers)
· ASTM (American Society for Testing and Materials)
· API (American Petroleum Institute)
· ISO (International Organization for Standardization)
Yes, clad flanges can be customized to meet specific requirements regarding material combinations, sizes, and dimensions to suit different applications and operational conditions.
Inspection and testing of clad flanges may include:
· Visual inspection for surface defects
· Ultrasonic testing to ensure proper bonding
· Radiographic testing for weld integrity
· Chemical analysis of the cladding material
· Mechanical testing for strength and durability
Clad flanges generally require minimal maintenance due to their corrosion resistance. Regular inspections and monitoring are recommended to ensure continued performance, especially in highly corrosive environments.
Selection depends on factors such as:
· Type of fluid and its corrosiveness
· Operating pressure and temperature
· Mechanical load and stress requirements
· Compatibility with other pipeline components
· Budget and cost considerations
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