Flanges are vital in many industrial applications and are important connectors between pipes, valves, and pumps. Flanges are used to create a secure and leak-proof connection between two components. An important aspect of a flange is its face type, which refers to the surface that comes in contact with the gasket. Flange faces come in different styles, and knowing which one to use is essential to ensure the success of your application. This blog post will discuss the different types of flange faces and their respective uses.
Types of Flange Faces
1. Flat Face Flanges
The most common types of flange face is the flat face flange, which has a flat surface that runs perpendicular to the length of the pipe. It is ideal for low-pressure applications that do not require a tight seal, such as water and air systems. Flat-face flanges are easy to install and cost-effective. However, they are not suitable for high-pressure applications due to their limited sealing capabilities.
2. Raised Face Flanges
Raised face flanges are popular in high-pressure and high-temperature applications. It has a raised surface around the bolt circle, which provides a better seal due to the extra pressure on the gasket. Raised face flanges use a full-flat gasket to ensure an effective seal. They are cost-effective and popular with users.
3. Ring-Type Joint (RTJ) Flange
Ring-type joint flanges, or groove flanges, have a circular groove machined into their surface into which a metal ring gasket sits. RTJ flanges are commonly used in high-pressure and high-temperature applications in the petrochemical and oil industries. They provide better sealing and increased strength and can withstand extreme operating conditions.
4. Tongue-and-Groove Flange
Tongue-and-groove flanges have a groove on one surface and a tongue on the other. The tongue fits into the track, creating a better connection between the flanges, which makes it more resistant to bending forces. This types of flange face is primarily used in high-pressure, high-temperature steam applications.
5. Socket Flange
Socket flanges, also known as neck-weld flanges, have a tapered hub that fits into a matching socket-weld joint. Socket flanges have a smooth surface that is ideal for applications that require low friction and limited turbulence. They are often used in high-pressure pipelines such as production, natural gas, and petrochemicals.
Conclusion
Understanding the different types of flange face is essential to choosing the right flange face for your application. Factors such as pressure and temperature influence the choice of flange face type. Flat-face flanges are suitable for low-pressure applications, while raised-face flanges are ideal for high-pressure applications. Ring joint flanges are best suited for high-temperature and high-pressure applications, while tongue and groove flanges are best suited for high-pressure steam applications. Socket flanges are most commonly used for high-pressure piping. It is always a good idea to consult a professional when selecting any flange type to ensure optimal performance and safety for your application.
