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Long welding neck flanges are designed for applications where strength, stress distribution and reliable welded connections are critical. Their extended hub provides a gradual transition between the flange and the pipe, helping to reduce stress concentrations in systems exposed to high pressure. At PipingMarket.eu, long welding neck flanges can be sourced through one online RFQ platform.
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Why are long welding neck flanges used?
The extended neck offers several technical advantages for demanding piping systems and process installations. Key benefits of long welding neck flanges include:
- improved stress distribution at the weld connection;
- suitable for high-pressure and high-temperature service;
- reduced risk of fatigue in cyclic operating conditions;
- smooth transition between seamless pipe and flange;
- available in a wide range of dimensions and material grades;
- suitable for both standard and custom-engineered applications.
Materials and specifications
Long welding neck flanges are available in carbon steel, stainless steel, duplex, super duplex, low alloy steel and nickel alloys. Material selection depends on the operating pressure, design temperature, corrosion resistance and applicable project specifications. Products can be manufactured according to internationally recognised standards, while custom dimensions, hub lengths and facing configurations are available for specialised applications.
Complementary flange solutions
Every piping project has different connection requirements. Besides long welding neck flanges, we support the sourcing of many other types of flanges, including:
Source the right flange solution
Every industrial installation has unique technical requirements. Whether you require standard dimensions or fully customised long welding neck flanges, we enable you to submit one RFQ based on your specifications. Our specialists help you source the appropriate piping products through an international supplier network, ensuring the solution matches your project's requirements.









