Stainless Steel Plate Flange RF Raised Face with ASTM A182 F316 Material and Class 300 Pressure Rating Featuring Serrated Finish Sealing Surface

Our stainless steel RF (Raised Face) plate flanges are forged from ASTM A182 F316 stainless steel for enhanced corrosion resistance in aggressive environments. The raised face sealing surface concentrates gasket compression onto a defined raised area (typically 1.6mm for Class 300), achieving higher sealing pressure with less bolt torque compared to flat face alternatives. This ANSI B16.5 Class 300 rated design is the industry standard for medium-pressure applications across chemical processing, oil and gas, and industrial fluid handling.

• RF Raised Face Configuration: The 1.6mm raised face concentrates bolt load onto a precisely defined gasket seating area, creating higher unit sealing pressure for reliable leak-free performance at Class 300 pressure ratings
• Serrated Finish Surface: Concentric or spiral serrated phonographic finish (125-250 AARH) on the raised face provides superior gasket grip, preventing blowout and ensuring consistent seal integrity under thermal cycling
• F316 Molybdenum-Bearing Steel: 2-3% molybdenum content delivers superior pitting and crevice corrosion resistance, making this flange suitable for chloride-rich, marine, and chemical environments
• Class 300 Pressure Range: Engineered for medium-pressure service with full compliance to ASME B16.5 pressure-temperature tables for reliable performance at elevated temperatures
• Universal Compatibility: RF facing is the most widely specified flange facing type globally, ensuring compatibility with standard ring-type gaskets and RF mating flanges across all major standards

• Chemical processing plant medium-pressure transfer lines
• Petrochemical refinery utility piping
• Marine and offshore platform seawater systems
• Industrial gas and compressed air distribution
• Pharmaceutical clean utility piping
• Power generation auxiliary cooling systems

ISO 9001:2015 certified facility. Each flange undergoes PMI verification, dimensional inspection, surface roughness measurement, and visual examination. EN 10204 3.1 certificates and third-party inspection by SGS/BV/TUV available.