The 3 Inch Weld Neck Flange (NPS 3″ | DN80) is a forged flange engineered for high-pressure and high-temperature piping systems. Designed with a long tapered hub, it is butt-welded directly to the pipe, ensuring smooth bore alignment and superior stress distribution. This design strengthens the connection between pipe and flange, reduces turbulence, and enhances overall system integrity, making it suitable for critical industrial operations.

Manufactured in accordance with ASME B16.5, the 3″ Weld Neck Flange is available in pressure ratings from Class 150 to Class 2500, depending on service requirements. It is offered in a wide range of materials including Stainless Steel (ASTM A182 F304, F304L, F316, F316L, F321, F347), Carbon Steel (ASTM A105, A350 LF2), Alloy Steel (F11, F22, F5, F9), Duplex & Super Duplex grades, and Nickel Alloys to provide durability, corrosion resistance, and long-term performance.

The standard face type is Raised Face (RF), with optional Flat Face (FF) and Ring Type Joint (RTJ) for high-pressure sealing applications. Each flange is manufactured under strict quality control and can be supplied with Mill Test Certification (EN 10204 3.1).

The 3 Inch Weld Neck Flange is widely used in oil & gas, petrochemical, power generation, marine, and chemical processing industries.