Typical Elements of Flanges and Their Characteristics - Manufacturer and Supplier of Stainless-Steel Flanges at Wholesale

We frequently utilize flange components such as flange bolts, flange gaskets, and flanged butterfly valves. Let's delve into their application characteristics.

The Characteristics of Typical Flange Components

Flange bolts.

A flange bolt is a fastening component composed of a hexagonal head, a flange plate, and a threaded rod. Connecting the two parts through a through hole requires the use of a nut. The hexagonal head of the flange bolt comes in two varieties: flat and recessed. Moreover, the size requirements of the flange bolt discs vary depending on their positions. Flange bolts are further categorized into flat-bottomed and serrated types, with serrated flange bolts offering enhanced anti-slip functionality.

Flange gasket.

A flange gasket is a ring capable of undergoing plastic deformation and possessing specific strength characteristics. Typically, gaskets are fabricated by cutting them from non-metallic sheets or producing them to specified dimensions through specialized manufacturing processes.

Flanged butterfly valve

The sealing principle and structural features of the flanged butterfly valve mirror those of the standard centerline butterfly valve. In the flanged butterfly valve, the disc's rotation center aligns with the valve body's centerline and the disc's sealing surface. The valve seat is crafted from synthetic rubber. When the butterfly valve is closed, the synthetic rubber valve seat compresses the outer circular cover of the butterfly plate, causing elastic deformation in the valve seat. This elastic force generates sealing pressure, ensuring the butterfly valve's tight seal.

How do you choose a flange gasket?

Flange gaskets serve as seals in pipe flange connections, creating a barrier between the two flanges. The choice of flange gaskets is directly influenced by factors such as the type of medium, pressure, and temperature. There are three primary types of flange gaskets:

50. Octagonal and oval gaskets: suitable for sealing surfaces of trapezoidal groove flanges, such as those found in A-type wafer butterfly valves.
50. The metal flat gasket's sealing surface is embossed with tooth-shaped grooves, making it ideal for concave-convex flange sealing surfaces.
50. Lens gasket: designed to seal the surfaces of lens flanges.

Metal gaskets are crafted from pure iron, very soft steel, stainless steel, aluminum, etc. These gaskets demand precise machining and surface roughness on their sealing surfaces and require significant bolt compression force. They are well-suited for high-temperature and high-pressure valve applications.

Flange Graphite Gasket: It comprises a thin metal-coated circular gasket with an asbestos core. Typically utilized in soft-sealing butterfly valves for concave and convex flanges, it's also effective in high-temperature and high-pressure valve setups.

Flange wound gasket: This gasket is crafted through a combination of corrugated metal tape and sealing material tape. Varieties include steel belt-asbestos, steel belt-polytetrafluoroethylene, steel belt-flexible graphite, and more. Typically applied to seal the surfaces of male and female flanges, it's ideal for medium-pressure and high-temperature valve applications.

Flange PTFE gaskets, typically crafted from PTFE or glass fiber PTFE materials, are primarily employed for tongue-and-groove sealing surfaces. They are well-suited for sealing against strong corrosive media under low temperature and pressure conditions.

Common flange gasket standards are as follows:

50. Spiral wound gasket pipe flange size range
50. Flat steel pipe flange asbestos rubber sheet
50. Asbestos rubber sheet for raised face steel pipe flanges.
50. Asbestos rubber sheet for male and female steel pipe flanges
50. Technical specifications for asbestos rubber gaskets used in steel pipe flanges.
50. Technical specifications for metal ring gaskets used in steel pipe flange connections.
50. Flexible graphite composite gasket for steel pipe flanges

Conclusion

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