304L 316L Blind Class300 Stainless Steel ANSI B16.5 Flange

This blind flange strictly complies with ANSI/ASME B16.5 standard, Class300 pressure rating, forged from ASTM A182 F304L and F316L low-carbon stainless steel. As a solid disc without central bore, it fully seals pipeline ends to isolate piping sections for maintenance, overhaul or system expansion, bearing full internal medium pressure reliably.

Ultra-low carbon design eliminates intergranular corrosion after welding without post-weld heat treatment. 304L fits general mildly corrosive fluid systems with stable oxidation resistance; molybdenum-containing 316L delivers superior anti-pitting performance against chloride, seawater and acidic chemicals.

Available in RF, FF and RTJ sealing faces, complete bolt hole layout ensures perfect matching with same-class pipe flanges. Precision machining guarantees flat sealing surfaces for zero leakage. Widely applied in petrochemical, oil & gas, power generation, food, marine and pharmaceutical medium-pressure piping, featuring long service life and outstanding corrosion resistance for harsh industrial environments.