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What are the Types of Flanges Used in Piping Applications?

Jan. 10, 2023

A flange is a projecting flat rim or collar used to strengthen or provide a means of attachment or mount for a mechanical or structural component. Flanges are often used to connect pipes, valves, and other equipment in a piping system. They can be used to connect two pipes or tubes together or to connect a pipe or tube to a larger piece of equipment. There are several types of flanges, including slip-on flanges, weld neck flanges, and threaded flanges, which are designed for different purposes and applications. Flanges are used in a wide variety of industries, including oil and gas, petrochemical, power generation, and water treatment.


flanges

flanges



There are several types of flanges that are commonly used in piping applications. These include:



Slip-on flanges


These flanges slide over the end of the pipe and are then fillet welded to provide a secure connection. They are often used in low-pressure applications.


Weld neck flanges


These flanges have a neck that is welded to the pipe. They are used in high-pressure and high-temperature applications and are the preferred flange for piping systems that are subjected to thermal expansion and contraction.


Lap joint flanges


These flanges have a stub end that is lapped over the pipe and then fillet welded. They are often used in low-pressure applications and in situations where access to the back of the flange is needed.


Threaded flanges


These flanges have threads cut into the inside diameter and are used with a pipe that has been threaded. They are used in low-pressure applications and are easy to install and remove.


Blind flanges


These flanges are used to seal the end of a pipe. They can be used in a variety of applications, including to blank off the ends of a pipeline or valve, or as a manhole cover.


Socket weld flanges


These flanges are similar to slip-on flanges, but they have a smaller diameter and are inserted into the pipe, where they are then fillet welded. They are used in high-pressure and high-temperature applications and are the preferred flange for piping systems that are subjected to thermal expansion and contraction.


Orifice flanges


These flanges are used for the measurement of flow rate, these flanges have a round opening in them.


These are some of the most common types of flanges used in piping applications. Depending on the specific requirements of your application, other types of flanges may also be appropriate.


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