Flange is a mechanical connection device, usually consisting of two circular metal plates, which are tightly connected together by bolts. Flange is called flange plate or flange by a few people. It refers to the connecting parts that are connected by bolts on two planes at the periphery, that is, the parts that connect the shafts to each other. It is also an important connection method in pipeline construction. This design not only makes installation more convenient, but also facilitates disassembly. Flanges are indispensable key components in various industries such as construction, light industry, heavy industry, plumbing, and electricity. There are many varieties of flanges. The characteristics and application scenarios of these flange varieties will be introduced in detail below.
Features: Comply with American standards (ANSI/ASME), with butt welding connection. It is often used in low-pressure, normal-temperature pipeline systems, such as water supply systems, air conditioning systems, etc.
Advantages: The connection is stable and suitable for low pressure and normal temperature environments.
Disadvantages: Poor applicability to high pressure and high temperature situations.
Complying with American standards, the flange has a neck to enhance the connection strength. It is suitable for some pipeline systems that require additional support, such as small and medium-sized pipelines transporting liquids or gases.
Advantages: Neck design enhances connection strength and is suitable for small and medium-sized piping systems.
Disadvantages: Limited applicability in high pressure and high temperature environments.
The connection surface is flat and suitable for general low-pressure and normal temperature pipeline systems. Commonly used in pipeline connections in construction, light industry and other fields.
Advantages: simple to make and easy to install.
Disadvantages: narrow scope of application and limited ability to withstand pressure.
With a neck and high connection strength, it is suitable for some pipeline systems that need to withstand greater pressure. Commonly used in high-pressure pipeline systems such as chemical industry, petroleum, and natural gas.
Advantages: The neck design enhances the connection strength and is suitable for some high-voltage occasions.
Disadvantages: Production costs are relatively high.
With neck and butt welding connection, it is suitable for high pressure and high temperature environments. Commonly found in high-pressure pipeline systems in petroleum, chemical, electric power and other industries.
Advantages: neck design and butt welding connection method, suitable for high pressure and high temperature environments.
Disadvantages: Installation and maintenance are complicated.
The flange body and the pipe body are integrally formed, and the connection is stable. Suitable for occasions requiring higher connection strength and sealing performance, such as high temperature and high pressure pipeline systems.
Advantages: The connection is stable and suitable for high pressure and high temperature environments.
Disadvantages: The production cost is higher and the installation is more complicated.
Connect the flange to the pipe through sockets to ensure a stable connection. It is often used in situations where higher connection strength and reliability are required, such as oil and natural gas transmission pipelines.
Advantages: The connection is firm and suitable for situations where a more stable connection is required.
Disadvantages: The installation is complicated and difficult to disassemble.
The connecting surface is threaded, and the flange and pipe are connected through threads. It is suitable for some small pipeline systems with low pressure and normal temperature, such as household water supply systems, gas pipelines, etc.
Advantages: Easy to install, suitable for low-pressure small pipeline systems.
Disadvantages: Limited ability to withstand pressure, not suitable for high pressure and high temperature environments.
Butt welding ring loose sleeve flange: The flange and the pipe are connected through a ring loose sleeve for easy disassembly and maintenance. It is common in situations where frequent maintenance or replacement of pipelines is required, such as chemical industry, food processing and other fields.
Advantages: Easy to disassemble and maintain.
Disadvantages: The connection strength is relatively low and the scope of application is limited.
It adopts flat welding connection method and has a ring loose sleeve design. Suitable for some pipeline systems that require frequent disassembly and maintenance.
Advantages: Easy to disassemble and maintain, suitable for pipeline systems that require frequent maintenance.
Disadvantages: The connection strength is low and not suitable for high pressure and high temperature environments.
Flange components used to seal pipelines, often used to test pipelines or temporarily seal pipelines. Commonly used when testing and repairing piping systems or sealing off unused pipes.
Advantages: Used for temporarily sealing or testing pipelines, convenient for maintenance.
Disadvantages: Not suitable for long-term sealing and requires regular inspection.
Lined design improves flange corrosion resistance. It is suitable for situations where the medium in the pipeline system is highly corrosive, such as chemical industry, pharmaceutical and other fields.
Advantages: Enhanced corrosion resistance, suitable for corrosive media pipeline systems.
Disadvantages: higher production cost and complicated installation.
The above is a brief description of the advantages and disadvantages of these 12 types of flanges. Choosing the appropriate flange type requires considering factors such as the working conditions of the pipeline system, medium characteristics, pressure requirements, and ease of installation and maintenance.
Definition of flange joint: Flange joints include pipe flanges, gaskets and fasteners, and are one of the most common and widely used components in engineering design. It plays an indispensable role in piping design and pipeline equipment, and is also one of the important components in equipment and components (such as manholes, sight glass level gauges, etc.). In addition, flange joints are often required in industrial furnaces, thermal equipment, water supply and drainage systems, heating and ventilation systems, automatic control equipment and other fields.