How Do Flanges Work and What Are They Used For?

A flange is a joining method used for many processing systems of pipes, valves, and other equipment. It provides people with flexibility when dealing with their piping systems, making it easier to replace parts when needed.

Three Parts of a Flanged Connection

• Gasket
• Bolting
• Pipe Flanges

Common Materials Used to Forge Flanges

Some of the most common flanges are made from stainless steel, but they are made from many other materials for different jobs. Some of the other materials that you can get them in are:

• Chrome-moly
• Ferritic / Martensitic Alloys
• Copper – Nickel Alloys
• Nickel & Nickel Based Alloys
• Aluminum Alloys

However, the type of material will depend on your system and the application for the flange.

What Are Common Characteristics and Flange Types?

You first must know that flanges do not come one-size/type-fits-all. You have to make the flange to the particular style required for your piping system.

Common Flange Face Types

• Male & Female (M & M&F) – This type is a lot like tongue and groove flanges, but they can retain the gasket, which makes them easier to place.
• Ring Join Face (RTJ) – This type is best used when high-temperature and high-pressure situations are designed to help maintain seals better.
• Flat Face (FF) – This design has a flat face, which is compatible with most flange surfaces.
• Tongue & Groove (T&G) – Several raised sections and matching grooves make it easier to align them properly.
• Raised Face (RF) – A small inside bore circle gasket and an expanded section to connect to.

Flange Dimensions

Flange dimensions are the next important characteristic that you should always consider. This will determine if they fit and work for the piping system. Some of the considerations you need to consider for dimensions are the following:

• Pipe Size – This is important because it is the area that the flange must correspond.
• Outside Diameter – The distance between two opposite edges with the flange face-centered.
• Nominal Bore Size – This is the measurement of the flange connectors and their inner diameter
• Bolt Circle Diameter – When measured from center to center, this is the distance found between the opposing bolt holes
• Thickness – This is a measurement of the outer attaching rim of the flange

We have provided you with this guide to help build a solid foundation and understanding of flanges. However, if you are still unsure what you need, contact the experts at Western of Texas and their sales department at (877) 246-2429. We are happy to consult with you on your project, being the top forged flanges manufacturer in their area. You can also see our brochure to learn more about our flange manufacturing.