EN1092-1 ASTM A182 F316L PN25 RF Welding Neck Flange is low-carbon molybdenum-containing forged butt weld flange, upgraded anti-corrosion version of 304 WN flange, customized for coastal, marine, chemical chloride-containing piping. Core upgraded advantages: low-carbon formula anti-welding intergranular corrosion, molybdenum element anti-chloride pitting corrosion, thickened neck high pressure resistance, passivation enhanced salt fog resistance, high temperature welding performance stable without material degradation.
Different from ordinary 304 flange, F316L low carbon component eliminates carbide precipitation during high-temperature welding, no weld joint corrosion failure after pipeline welding. Added molybdenum alloy resists seawater, brine, chloride solvent electrochemical corrosion, 2.5 times longer seaside service life than 304 WN flange. Reinforced tapered neck upgrades pressure grade to PN25 2.5MPa, withstands seawater water hammer and floating pipeline impact load, suitable for ship and coastal swaying piping.
Full body super pickling passivation forms dense anti-salt fog protective layer, passed 5000h neutral salt spray test. Smooth inner bore avoids medium residue and crevice corrosion. Precision RF sealing face fits marine anti-corrosion gasket, full penetration weld ensures integral pipe strength. EU standard size DN20-DN600 in stock. Factory support drawing OEM, custom welding bevel, custom surface finish. Comply with PED pressure equipment directive, SGS certified. 20-year seaside service life, 18-month factory warranty, export fumigated packing available.
Core Product Advantages:1.Low carbon anti-welding corrosion;2.Mo alloy anti-chloride pitting;3.Thick hub anti-impact;4.Salt fog resistant for coastal use;5.Stable high-temp welding property
Core Spec: Standard: EN1092-1; Pressure: PN25; Face: RF; Material: F316L Mo-bearing Stainless Steel; Process: Hot Forged + Super Passivation; Size: DN20-DN600
FAQ: Q: Difference between 304 and 316L WN flange?
A: 316L resists salt fog and chloride corrosion, fit for marine and coastal harsh environment.
