What is the Difference Between a Flange and a Flange Adapter?

Jun 4, 2025 | NEWS

The knowledge about the different components that are being used in the piping systems is very important in the installation and the system’s workability. Among these components, ductile iron flanged fittings and ductile iron flange adapters occupy the primary position in that they are used to join the pipes and accessories. But, what is a flange vs flange adapter? In this article, we hereby explain, through the discussion of these items and their related areas, the essential characteristics of your pipeline and how they help it become more efficient.

ductile iron flange adapter

Defining Flange Adapters

A flange adapter is a kind of flanged fitting that offers the user the benefits of not having to create another joint on the pipe when installing it. It is an intermediate piece that fastens the joint in the case of one or both of the joining ends having a flange. The flange adapter provides flexibility, reduces the risk of the pipe assembly, and gives all the necessary support for a safe connection.

Types: Flange adapters can be classified as a straight or a flange adaption one. The straight flange adapter could be either a mechanical (gasketed) push-on joint, or a restrained joint, depending on the need of the project. The main function of the flange adaption one is to fasten it by the mean of a flange to the pipe and employ the victaulic system for the (un-)installing of the joint. The non-lifting flange adapter is like an outside flange and has a gasket, and this is the reason it is also called the multi-adapter.

Materials: Plastic, ductile iron, steel, polyethylene, ABS, and flexible PVC are some common materials used for the production of flange adapters.

Applications: Flanges are used in many sectors such as the water treatment, oil and gas, HVAC, fire protection businesses, etc.

What does the ductile iron flange adapter mean?

A ductile iron flange adapter is a special type of connecting tubular fitting needed to connect pipes or equipment with different flange types or sizes.

Design: Flange adapters are usually constructed in a manner that there is a female end on either side which are placed against each other, so they are able to join non-similar flanges.

Length: Flange adapters vs. standard flanges differ in length as their main distinction. While being longer in comparison with standard flanges, flange adapters have the sealing length that has been made obtainable through the fusion machines or the other connecting methods. This easy and rapid joining is very important particularly for those installations that must be tightly and stably connected.

Versatility: Flange adapters may directly have different sizes and styles of flanges, and hence, they can connect various components at different positions in the piping system.

Major Differences Between Flanges and Flange Adapters

Here are the two main differences:

Purpose

Flanges: These are connectors used to fix two similar components. They are often used to form a secure and solid junction.

Flange Adapters: These are special connectors that are used in the process of joining very dissimilar components (with different flange types, or sizes) and therefore help in deciding the system’s flexibility.

 Design

Flanges: Mostly flat with holes for bolts to fasten to another flange.

Flange Adapters: Longer than the standard flanges, two female ends for connecting dissimilar flanges is a characteristic.

Applications

Flanges: Commonly used in simple piping connections where components match.

Flange Adapters: The best for the retrofitting of already existing systems or attaching new components to older installations.

Installation

Flanges: Perfect alignment with matching flanges is needed for a good seal.

Flange Adapters: Have more flexibility during the installation phase and be able to accommodate different flange types and sizes.

Why Choose Ductile Iron Flanged Fittings?

Ductile iron flanged fittings, including flanges and flange adapters, offer several advantages that make them an excellent choice for various applications:

Durability: Ductile iron is known for its strength and resistance to cracking and deformation. This durability ensures that flanged fittings can withstand high pressures and loads, making them suitable for demanding environments.

Longevity: With a long lifespan, ductile iron fittings provide a long-lasting solution for piping systems, reducing the need for frequent replacements.

Versatile Applications: Ductile iron flanged fittings find use in a wide range of applications, including fire protection systems, gas pipelines, HVAC installations, and more.

Conclusion

In summary, understanding the difference between a flange and a ductile iron flange adapter is essential for anyone involved in piping systems. While flanges serve as connection points for similar components, flange adapters provide the flexibility to connect dissimilar flanges, making them invaluable in various applications.

Choosing high-quality ductile iron flanged fittings and pipes from reputable manufacturers like YINUO ensures that you receive durable, reliable products that meet the demands of your specific application. Contact us today!