WNFF Flanges known as Weld Neck Flat Face Flanges, have a flat gasket surface that sits in line with the bolting circle face. These flanges are used in high-pressure systems that handle extreme temperatures. Welded at the neck, they allow for easier radiographic inspection of the joint. The flange bore matches the pipe bore, minimizing flow turbulence and erosion. It also reduces stress at the flange base. Because of this, WNFF Flanges are used in high-stress pipelines. Tesco Steel & Engineering is a trusted WNFF Flanges manufacturer and supplier known for consistent quality and timely delivery across global industries.
These flanges are available in sizes from 1/2" NB to 56" NB. Available in in pressure classes 150#, 300#, 3000#, 6000#, and 9000#. Customers can select from schedules like XS, XXS, STD, and Sch 20, 40, 80, 160. Pressure ratings go from PN 1 up to PN 400. We supply WNFF Flanges in materials including carbon steel, stainless steel, alloy steel, nickel alloy, duplex steel and copper. Each flange meet exact system specs and flow needs.
WNFF Flanges are known for their strong sealing, tight fit and longer service life. They work well in power plants, refineries, petrochemical setups, and heavy-duty piping systems. The weld neck design helps prevent leaks and supports the flange under high loads. These flanges are also great for systems that need frequent inspection, thanks to their radiographic test-friendly welds. Their use in pressure vessels and hazardous fluid systems highlights their performance and safety benefits.
