Stainless Steel 304L Flange

JN ALLOY supplies 304L SO flanges, 304L WN flanges, UNS S30400 blind flanges, 1.4306 304L plain flanges, ASTM A182 UNS S30403 SW flanges, 304L spectacle blind flanges, SUS 304L threaded flanges, 1.4307 spacer ring, UNS S30403 paddle blind/blank, 304L bleed/test/drip ring, 304 reducing flange.

Stainless steel 304L flange is made of ultra-low carbon (≤0.03%) austenitic stainless steel that serves as an important pipe connector. SS 304L significantly improves the resistance to intergranular corrosion in the welding area by reducing the carbon content, and is particularly suitable for working conditions where post-weld heat treatment is not possible. UNS S30403's chemical composition (18-20% chromium, 8-12% nickel) imparts excellent oxidation resistance and acid corrosion resistance, while also having high strength (tensile strength ≥485 MPa) and low-temperature toughness (can withstand -196°C).

Stainless steel 304L flanges come in various types, including weld neck (WN), long weld neck (LWN), slip-on (SO), socket weld (SW), blind, plate, threaded, lap joint, orifice, and spectacle blind flanges. Additionally, there are special products available, such as rings, forgings, discs, and flange sleeves, catering to diverse industrial applications and requirements. The manufacturing process of Stainless Steel 304L Flange covers hot forging/cold forging, solution annealing and precision CNC machining. The surface is electrolytically polished or passivated to meet food grade (FDA/3-A) and high clean environment (such as semiconductor) requirements.

SS 304L is widely used in petrochemical (anti-sulfide corrosion), pharmaceutical (CIP system), LNG cryogenic storage and transportation and coastal engineering. S30403 is more resistant to welding corrosion than 304 stainless steel and more cost-effective than 316L. Stainless steel 104306 supports green innovations such as recycled materials (60% recycling rate) and digital tracking (RFID), complies with multiple international standards such as ASME, EN, NACE, and is an industrial core component that takes into account reliability, economy, and sustainability. Jinie Technology (Jiangsu) Co., LTD supply all different types and scales of flanges. Please feel free to contact us for further product information and pricing.