304/316 Stainless Steel Welded Neck Forged Flange - ANSI/GOST/DIN Certified, Class 3000, DN80 to DN500

With nearly two decades in the flange industry, I’ve seen Weld Neck (WN) Flanges stand out as the backbone of critical piping systems—truly the workhorses where reliability and safety can’t be compromised.

Designed with a long, tapered neck that seamlessly merges with the pipe via butt welding, WN flanges excel at distributing stress evenly across the connection, making them the top choice for high-pressure, high-temperature (HPHT) applications. Whether handling volatile hydrocarbons in oil & gas pipelines, superheated steam in power plants, or corrosive chemicals in refineries, their robust construction eliminates weak points, minimizing leak risks even under extreme cyclic conditions.

Our WN flanges are forged from premium materials—carbon steel (A105N), stainless steel (304L, 316L), and alloys (F11, F22)—to meet ASME B16.5, ASME B16.47, and EN 1092-1 standards, ensuring dimensional precision and compatibility with global piping systems. The raised face (RF) or ring-type joint (RTJ) sealing surfaces are machined to tight tolerances, pairing perfectly with gaskets to create a metal-to-metal seal that outperforms other flange types in demanding environments.

What truly sets WN flanges apart? Their versatility. From small-bore (1/2”) to large-diameter (48”+) systems, they adapt to both onshore and offshore projects, including subsea installations where durability is non-negotiable. We’ve supplied them to refineries upgrading their process lines, power plants modernizing boilers, and LNG terminals needing leak-proof connections—each time, proving their worth in critical service.

Backed by rigorous NDT testing (UT, MT, PMI) and full traceability from raw material to delivery, our WN flanges aren’t just
components; they’re commitments to uptime and safety. Whether you need standard stock or custom configurations (special alloys, exotic materials), we’ll match your project’s specs with the expertise that comes from 20 years of solving flange challenges worldwide.

Ready to fortify your pipeline? Let’s discuss your pressure class, material needs, and service conditions—we’ll deliver Weld Neck Flanges that perform, project after project.