Flange

Flange Product Introduction
1、 Product Overview
Flange is a mechanical component used to connect pipes, fittings, valves and other equipment. It is mainly used to realize the close connection of different pipes and ensure the safe transmission of fluid. Flange connection is achieved by bolting between flanges and adding sealing gaskets to achieve the purpose of sealing and bearing pressure. As an important pipeline connection component, flanges are widely used in petroleum, chemical industry, electric power, metallurgy, food, pharmaceuticals and other fields, especially in extreme environments such as high temperature, high pressure and corrosive media, which can ensure the safety and stability of the pipeline system.
2、 Product features
High connection stability
Flange connections provide strong mechanical strength and stability. Flange connections are bolted together, avoiding weld defects that may occur in traditional welding methods, and reducing the risk due to the welding process.
Strong adaptability
Flanges are suitable for connection of various pipes, equipment and instruments and can adapt to various working conditions. Flanges can provide reliable sealing and connection performance under low pressure, normal temperature environment or high temperature, high pressure and strong corrosion conditions.
Easy to install and remove
Flange connection does not need as complex welding process and professional equipment as welding, and only needs to be fixed by bolts and sealing gaskets during installation, so the operation is simple. It can be easily detached by simply removing the bolts and is suitable for use in locations where periodic maintenance or replacement of equipment is required.
Customizable and customizable
Flanges have different types, sizes, materials and connection methods, which can be customized according to specific use requirements. The common flange standards include ANSI, DIN, JIS, etc. Users can select the appropriate flange type and size according to the pipe specifications and connection requirements.
Good sealing performance
The tightness of flange connection is realized through the combined action of pressing force between flange faces and sealing gasket. The flange has excellent sealing property and can effectively prevent fluid leakage, which is applicable to the pipeline system conveying various media.
Corrosion and High Temperature Resistance
Flanges are usually made of carbon steel, stainless steel, cast iron, copper and other corrosion resistant materials, which can withstand the corrosion of different chemicals and ensure the tightness in long-term use. Meanwhile, metal flanges can withstand high temperature and high pressure environment and adapt to various complex conditions in industrial production.
3、 Type of flange
Flanges are various according to different applications, working conditions and connection methods. Common flange types are:
Weld Neck Flange
Slip-on flanges are typically used in piping systems subject to higher pressures. Its flange neck is directly welded with the pipeline, which is applicable to the occasion requiring high strength connection, and can provide better strength and compression resistance.
Slip-On Flange
Loose flanges are also referred to as slip-ring flanges where the pipe slides directly into the flange bore and is secured by welding. Loose flange is easy to install and suitable for pipe connection with low pressure.
Blind flange (Blind Flange)
The blind flange is used to close the pipe end, usually installed at the end of the pipe system or used for overhaul and maintenance of the pipe. The blind flange has no orifice, which can effectively seal the pipeline and prevent medium leakage.
BUTT WELD FLANGE
Welding neck flanges are suitable for higher pressure and temperature environments. Its flange is directly welded with the pipeline without bolt fixing, and it is applicable to occasions requiring high tightness and high strength connection.
NECK FLANGE (NECK FLANGE)
The neck flange is similar to a slip-on flange, but it has a long neck to help improve the strength and stability of the weld. Commonly used for piping systems that are subjected to high pressures and temperatures.
Threaded Flange
Threaded flanges are threaded to piping and do not require welding and are suitable for environments where welding is not permitted, such as certain high-pressure gas piping. Threaded flanges are easy to install and remove, but are suitable for low pressures.
Blind flange (Blind Flange)
Blind flanges are used to close the ends of piping. It has no orifice and is normally used for pipe ends or for sealing during maintenance. Blind flanges are a very common fitting, particularly when it is necessary to decommission or temporarily close piping.
Tongue and Groove Flange
A tongue and ring flange is a flange with a raised portion (tongue) and a recess (groove). The two flanges are inserted and connected through tongues and slots, which are applicable to occasions with high pressure and sealing requirements.
4、 Material of flange
Flange material shall be selected according to service environment, bearing medium, temperature, pressure and other factors. Common materials include:
CARBON STEEL FLANGE
Carbon steel flange has high strength and low cost, which is applicable to pipeline connection of low-temperature conventional medium. Carbon steel flanges can be heat treated for enhanced corrosion and wear resistance.
Stainless steel flange
With excellent corrosion resistance, stainless steel flanges are suitable for chemical, petroleum, natural gas and other industries. Common stainless steel materials include 304, 316, etc., which can withstand high temperature and strong corrosive medium.
Cast iron flange
Cast iron flanges are normally used for piping connections in low pressure systems. It has the advantage of good corrosion resistance and is suitable for non-pressure environment such as water pipeline.
Alloy steel flange
Alloy steel flanges have stronger high temperature resistance and corrosion resistance, and are widely used in high temperature and high pressure pipeline systems of chemical fertilizer, petroleum, chemical industry and other industries.
Copper flange
Copper flange has excellent corrosion resistance, especially suitable for the connection of seawater, steam and other corrosive medium pipelines.
Plastic flange
Plastic flanges are usually used in chemical engineering, food industry and other environments with high requirements on hygiene. Common plastic materials include PVC, PVDF, etc., with excellent corrosion resistance.
5、 Application field of flange
Flanges are widely used in various occasions where pipeline connection and sealing are required. The main application fields include:
Oil and Gas Sector
Oil and gas production, storage and transportation processes often require the use of flanges to connect pipelines and equipment to prevent fluid leakage and ensure safety.
Chemical industry
The production, processing and transportation of chemicals require the use of flanged piping and equipment such as reactors and pumps. Flange corrosion resistance and leak-tightness are essential for chemical processes.
Power and Metallurgical Industry
The steam pipeline and high temperature and high pressure cooling system of the power plant shall be connected with flanges. Flange can bear high temperature and high pressure to ensure stable operation of equipment.
Water treatment industry
Flanges are widely used for pipe connection of sewage treatment plant, water plant and other facilities, which can effectively prevent water leakage and ensure efficient operation of water treatment system.
Food and Pharmaceutical Industry
In the food and pharmaceutical industry, flanges are commonly used for piping connections in food processing equipment and pharmaceutical manufacturing equipment. These flanges are usually made of stainless steel or other non-toxic and harmless materials.
6、 Summary of Summary
As an important pipe connection component, flange has a wide application prospect. Its robust connectivity, excellent tightness and ease of installation and removal make it an integral part of pipeline systems in all walks of life. Flanges play a critical role in a wide range of industries, from petrochemical to food pharmaceuticals. With the progress of industrialization and the development of technology, the design, material and performance of flanges will be further improved to meet the needs of more industrial fields.