What Is Plate Flange? Uses, Dimensions And Types

Plate Flange

Regarding piping systems, flanges are crucial in connecting pipes, valves, pumps, and other components. A plate flange is one of the most commonly used flanges, offering many advantages over other types. In this blog post, we will explore the uses, dimensions, and types of plate flanges to help you understand more about these essential components of piping systems.

What Is A Plate Flange?

Plate Flange is a type of flange that is commonly used in piping systems for connecting pipes, valves, and other equipment. It comprises a flat circular disk with evenly spaced bolt holes around the perimeter. The plate flange provides an easy way to align and connect components, making it ideal for oil and gas, petrochemicals, and water treatment plants. Additionally, plate flanges are available in various materials, such as carbon steel, stainless steel, and plastic, to suit different operating conditions. They also come in different sizes and pressure ratings to accommodate varying pipe sizes and system requirements.

Uses Of Plate Flange

Plate flanges are commonly used in oil and gas, chemical processing, and construction industries. They connect pipes and other components to create a secure and leak-free joint. Plate flanges can be used in various applications, ranging from low-pressure to high-pressure systems. In low-pressure applications, plate flanges are commonly used when the piping system requires frequent dismantling. For high-pressure applications, they are used to provide a secure and leak-free joint.

Dimensions Of Plate Flange

Plate flanges come in various sizes, dimensions, and thicknesses to meet different requirements. The most common plate flange sizes range from ½ to 24 inches, but larger sizes are also available. The thickness of the flange varies depending on the pressure rating and material used. The most common thicknesses are 5mm, 10mm, 15mm, and 20mm. The bolt circle, bore, and outer diameter of the flange also vary depending on the size and application.

Types Of Plate Flange

There are two main types of plate flanges: flat face and raised face. Flat-face flanges are used in applications where the piping system requires frequent dismantling and maintenance. They are flat on both sides and come with bolt holes drilled through the centre of the flange. Raised face flanges are used in high-pressure applications requiring a tight seal. The raised face adds extra support to the flange and helps to create a more secure connection.

Another type of plate flange is the ring-type joint (RTJ) flange. These flanges are used in high-pressure and high-temperature applications and are designed to handle extreme pressure and temperature conditions. They consist of a metal ring placed inside the flange and crushed between two flanges to create a tight seal.


Understanding plate flanges is essential for anyone working with piping systems. Knowing the uses, dimensions, and types of plate flanges can help you make informed decisions when choosing the right components for your piping system. Whether you are working in low-pressure or high-pressure applications, there is a plate flange that will suit your needs. Selecting the right plate flange ensures that your piping system operates safely and efficiently for years.