What are Long Weld Neck Flanges?
A long weld neck flange is a type of flange that has a long neck and a flared-out end.
The neck is usually welded onto the pipe, providing a smooth transition between the pipe and the flange.
The flared-out end of the flange has bolt holes which allow it to be bolted to another flange of the same size and pressure rating.
Long-weld neck flanges are typically made from materials such as carbon steel and stainless steel and alloys such as Inconel, Hastelloy, and Monel.
Applications of Long Weld Neck Flanges
Long Weld Neck Flanges are commonly used in high-pressure and high-temperature applications in oil and gas, chemical processing, and petrochemicals.
They are also used in applications where the flange needs to be bolted to a vessel, such as reactors and pressure vessels.
Long weld neck flanges provide a smooth transition between the pipe and the flange, reducing the risk of stress concentration and fatigue failure.
Benefits of Using Long Weld Neck Flanges
There are several benefits of using Long Weld Neck Flanges. Firstly, their long neck provides a smooth transition between the pipe and the flange, reducing the risk of stress concentration and fatigue failure.
This makes them ideal for high-pressure and high-temperature applications. Secondly, the flared-out end of the flange has bolt holes which provide a secure and leak-proof connection with another flange of the same size and pressure rating.
Lastly, long weld neck flanges provide easy access for inspection and maintenance, as they can be easily removed and replaced without cutting the pipe.
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