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Long Weld Neck Flange vs Weld Neck Flange – What’s the Difference

Long Weld Neck Flanges vs Weld Neck Flanges - What's the Difference

When it comes to industrial piping, there are a variety of flange types available. Two popular options are long weld neck flanges and weld neck flanges. Each has its own advantages depending on the application and project type. To help you make the best decision for your next project, let’s look at what sets these two types of pipe flanges apart.

Weld Neck Flange

A weld neck flange is a specialized component in piping systems, distinguished by its elongated neck that is welded to the pipe, enhancing structural integrity and minimizing stress concentrations. Its raised face with bolt holes facilitates secure attachment to other flanges or equipment, ensuring stability and reliability in high-pressure and high-temperature environments. Weld neck flanges are preferred for critical applications where the integrity of the connection is paramount, offering robust performance and consistent fluid flow throughout the system.

Long Weld Neck Flange

Like the standard weld neck flange, the long weld neck flange is also designed with a tapered hub that fits inside the pipe for added strength and stability in higher-pressure applications. However, this type of flange also features an extended hub length which helps improve overall structural integrity by providing additional support during turbulent or high-pressure flow conditions. Because they offer more stability than standard weld neck flanges, long weld neck flanges are typically recommended for use in critical piping applications such as those found in power plants or refineries. These types of pipe fittings can also be used in applications where temperatures exceed 850°F (454°C).

Difference Between Long Weld Neck Flanges and Weld Neck Flanges

  • Long weld neck flanges have a longer neck than weld neck flanges.
  • Long weld neck flanges are used in applications with high pressure and high temperatures.
  • Weld neck flanges are used in lower-pressure and temperature applications.
  • Long weld neck flanges can be custom-made to specific dimensions.
  • Weld neck flanges are generally less expensive than long weld neck flanges.
  • Long weld neck flanges have a higher weight capacity than weld neck flanges.


Both long weld neck flanges and standard weld neck flanges provide strong connections between pipes, but each offers distinct advantages depending on your project requirements. For higher pressure applications or projects requiring temperatures exceeding 850°F (454°C), long weld neck flanges are often recommended due to their improved structural integrity over standard versions. Ultimately, choosing which type works best depends on your specific application needs, so you must consider all factors before making your final decision.

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