A flat flange is a type of flange that has a flat face on both sides. It is the simplest type of flange and is commonly used in low-pressure applications. Flat flanges are typically made of steel, stainless steel, or cast iron.
The technical specifications of a flat flange will vary depending on the material, size, and pressure class. However, some common specifications include:
Nominal pipe size (NPS): 1/2 INCH - 24 INCH
Flange pressure class: 150 - 2500
Material: Cast Iron, Steel and Stainless Steel
Thickness: 1/4 INCH - 1 INCH
Face type: RF, FF, RJT
Flat flanges have a gasket surface in the same plane as the bolting circle face. It is also known as flat face flange. Applications using flat face flanges are frequently those in which the mating flange or flanged fitting is made from a casting. Flat face flanges are used when the counter-flanges are flat face. This condition occurs mainly on connection to Cast Iron equipment, valves, and specialties. ASME B31.1 says that when connecting flat face cast iron flanges to carbon steel flanges, the raised face on the carbon steel flange must be removed, and that a full face gasket is required.
SS Socket Weld Flanges Stainless Steel Socketweld Plate Flanges SS SWRTJ Flange Stainless Steel Socketweld Flanges Stainless Steel Socket Weld Flange SS Socketweld Flange Stainless Steel Flat Face Socketweld Flanges ASTM A182 Stainless Steel Socketweld Flange Stainless Steel SWFF Flange
Stainless Steel Socketweld Plate Flanges SS SWRTJ Flange Stainless Steel Socketweld Flanges Stainless Steel Socket Weld Flange SS Socketweld Flange Stainless Steel Flat Face Socketweld Flanges ASTM A182 Stainless Steel Socketweld Flange Stainless Steel SWFF Flange
SS BLRTJ Flange Stainless Steel Blind Plate Flanges Stainless Steel Flat Face Blind Flanges Stainless Steel Blind Flanges SS Blind Flange Stainless Steel BLFF Flange ASTM A182 Stainless Steel Blind Flange
SS BLRTJ Flange Stainless Steel Blind Plate Flanges Stainless Steel Flat Face Blind Flanges Stainless Steel Blind Flanges SS Blind Flange Stainless Steel BLFF Flange ASTM A182 Stainless Steel Blind Flange
High Yield CS ASTM A694 BLRTJ Flange High Yield CS ASTM A694 F52 Blind Plate Flanges Carbon Steel Flat Face Blind Flanges Carbon Steel Blind Flanges CS Blind Flange Carbon Steel High Yield Blind Flanges Carbon Steel BLFF Flange CS Blind Flange
Stainless Steel Flat Face Slip on Flanges Stainless Steel Slip On Flanges SS SORTJ Flange ASTM A182 Stainless Steel Slip On Flange Stainless Steel Slip On Plate Flanges Stainless Steel SOFF Flange SS Slip On Flange
Stainless Steel Flat Face Slip on Flanges Stainless Steel Slip On Flanges SS SORTJ Flange ASTM A182 Stainless Steel Slip On Flange Stainless Steel Slip On Plate Flanges Stainless Steel SOFF Flange SS Slip On Flange
ASTM A694 High Yield Carbon Steel Flat Face Slip on Flanges High Yield CS ASTM A694 On Flanges High Yield Carbon Steel A694 SORTJ Flange High Yield Carbon Steel A694 F60 Slip On Flange CS Slip On Plate Flanges ASTM A694 High Yield Carbon Steel F70 SOFF Flange Carbon Steel Slip On Flange
