Pipe Flanges: Types, Faces and Ratings

Pipe flanges are indispensable components in industrial piping systems, facilitating secure connections between pipes, valves, fittings, and more. In this article, we delve into the intricacies of pipe flanges, their types, working principles, materials, and applications.

How Pipe Flanges Work

Pipe flanges work by bolting together piping components with the aid of a gasket to ensure a leak-free connection. The components of a typical pipe flange connection include the pipe itself, the flange, a gasket for sealing, bolting, and in some cases, welding.

Threaded Flange

• Joined using male and female threads.
• Suitable for low-pressure applications like water and compressed air systems.

Welding Neck Flange

• Welded to the pipe for high-pressure applications.
• Offers unrestricted flow without turbulence or erosion.

Slip-On Flange

• Secured with fillet welds on the inside and outside.
• Ideal for low-pressure, non-critical applications.

Socket Weld Flange

• Used for small-size, high-pressure pipes.
• Pipe is inserted into the flange socket and welded in place.

Lap Joint Flange

• Combined with stub ends to reduce costs.
• Ideal for connecting dissimilar materials in pipeline systems.

Blind Flange

• Seals or closes pipelines to block fluid flow.
• Allows easy access for maintenance activities.

Pipe Flange Face Variants

Pipe flanges come in various face variants, each with its unique sealing characteristics:

• Flat Face (FF)
• Raised Face (RF)
• Lap Joint (LJ)
• Ring Joint (RTJ)
• Male and Female (M&F)

Common Pipe Flange Materials

At Fortune Fittings Private Limited, we offer pipe flanges in a variety of materials, including:

• Stainless Steel
• Nickel Alloys (Inconel, Incoloy, Hastelloy, Monel)

Pipe Flange Classification and Pressure Rating

Pipe flanges are classified based on pressure ratings, ranging from 150 to 2500 according to ANSI/ASME B16.5 standards. The pressure rating determines the maximum allowable pressure a flange can withstand at varying temperatures, making it crucial to select the right flange for your application’s requirements.

Conclusion

Contact us today to explore our product range and request a competitive price list.