Flanges play an important role in the industrial sector. They are essential components that connect pipes and valves in various pipelines to ensure the seamless and efficient flow of fluids and gases. Flanges also provide easy access for maintenance, repair, and cleaning procedures. With the significance of flanges in industrial applications, it's no surprise that a wide range of flange types is available in the market.
One of the most commonly used flanges is the WNRF flange or Weld Neck Raised Face Flange. This type of flange is considered the best choice for critical applications where high pressure, high-temperature, and cyclic loading conditions are expected. WNRF flanges have a tapered hub that gradually merges with the pipe while the outer diameter of the flange remains constant. The raised face portion of the flange provides a flat surface for gasket seating, making it ideal for high-pressure applications.
Another popular flange type is the SO or Slip-On flange. This type of flange is easy to install, and it's best suited for applications where the pipe alignment isn't critical. SO flanges have a raised face or flat face, depending on the application, and they slide over the pipe's end before being welded in place. These flanges are commonly used in low-pressure applications.
Blind flanges are another type of flange that finds application in pipelines that require regular maintenance and inspection. These flanges are designed to close the ends of a pipeline, allowing easy access for maintenance procedures while preventing leaks. Blind flanges come in different materials and grades, and the gasket face can be raised, flat, or RTJ (Ring Type Joint) as per application requirements.
Socket Weld flanges are commonly used in small-bores and high-pressure pipelines. These flanges have a socket or bore that matches the pipe's outer diameter, and they are easy to install and offer secure fitting. The pipe is inserted into the socket, and then a fillet weld is applied around the socket's perimeter.
Lap-joint flanges are also known as stub-end flanges, and they are commonly used in pipelines where frequent or quick disassembly is required. These flanges consist of two parts, the flange itself and a stub-end fitting. The lap-joint flange is typically used on the stub-end side, and a gasket is inserted between the two flanges before bolting them together.
In conclusion, flanges are crucial components in industrial piping applications, and it's essential to use the right kind of flange for the right application. WNRF flanges are perfect for high-pressure and high-temperature applications, while SO flanges are ideal for low-pressure applications. Blind flanges are great for providing easy access for maintenance procedures, while socket weld flanges are best for small-bore and high-pressure pipelines. Lastly, lap-joint flanges are perfect for applications requiring quick disassembly or frequent maintenance.
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