Stainless Steel Plate Flange with Flat Face Design ASTM A182 F304/F316 ANSI B16.5 Class 150 for Full-Face Gasket Compatibility

Our stainless steel plate flanges with FF (Flat Face) sealing surface are precision-forged from ASTM A182 F304 and F316 grade materials. The flat face design provides a full, continuous sealing area that mates perfectly with full-face gaskets, ensuring uniform compression across the entire flange face. This design is particularly suited for low-pressure applications where the flat mating surface prevents gasket blowout and simplifies alignment during installation. Manufactured to ANSI B16.5 Class 150 standards, these plate flanges deliver reliable, maintenance-friendly connections for water distribution, HVAC, and general industrial piping.

• FF Flat Face Design: The flat face configuration provides a full continuous sealing surface from bore to OD, enabling the use of full-face gaskets that cover the entire flange face for maximum sealing reliability
• Optimized Sealing Surface: Precision-machined to a surface finish of 125-250 AARH, ensuring optimal gasket compression and adhesion without excessive bolt torque requirements
• Full-Face Gasket Compatibility: Unlike raised face designs, the FF configuration accommodates full-face gaskets that extend to the bolt circle, preventing gasket extrusion and ensuring even load distribution
• Forged Stainless Steel: ASTM A182 F304/F316 hot-forged construction delivers excellent corrosion resistance and dimensional stability for long service life
• Low-Pressure Optimization: The FF design is the preferred facing type for cast iron, plastic, and low-strength mating flanges where raised face designs may cause flange cracking

• Municipal water distribution systems with cast iron mating flanges
• HVAC chilled water and cooling tower piping
• Low-pressure chemical transfer lines
• Fire protection sprinkler system connections
• Food and beverage processing utility piping

ISO 9001:2015 certified quality management ensures every plate flange undergoes PMI material verification, dimensional inspection per ANSI B16.5, and visual surface inspection before shipment. EN 10204 3.1 material certificates available upon request.