Are ANSI flanges raised face?
All of the ANSI pressure classes are available with raised face flanges.
What is the height of the raised face on a 300 flange?
approximately 1.6 mm
In Pressure Classes 150 and 300, the height of raised face is approximately 1.6 mm (1/16 inch).
What is the purpose of the serrations on a raised face flange?
A serrated finish, either concentric or spiral, is required with 30 to 55 grooves per inch and a resultant roughness between 125 and 500 micro inches. This allows for various grades of surface finish to be made available by flange manufactures for the gasket contact surface of metal flanges.
Can you mate a flat face flange to a raised face flange?
Flat face flanges are never to be bolted to a raised face flange. 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.
Can you bolt a raised face flange to a flat face flange?
The Flat Face flange has a gasket surface in the same plane as the bolting circle face. 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 never to be bolted to a raised face flange.
Can you use a flat face with a raised face flange?
What is face of flange?
The face of a flange is the side opposite the hub that faces the bolted connection of the main flange flange fitting or flange valve. The most common face is the Raised Face flange, such as the one I have here. On this Class 150 flange, we have a 1/16 inch raised face.
Can you use a raised face flange with a flat face flange?
What is a flat face?
Flat faced breeds are any dogs, cats or rabbits that have short, squashed noses (flat-faces). There’s been a lot of focus on dog breeds like Pugs but these aren’t the only pets that can have health problems because of the way they look.
Can I use full-face gasket on raised face flange?
The full-face gasket is typically used with flat face flanges but can also be used with RF flanges. It sits on the raised flange faces but has the same outside diameter of the flange. For that reason, it has to have holes for the bolts securing the flanges to pass through.
What is a raised face gasket?
Raised Face (RF) Flanges It is referred to as a raised face because the gasket surfaces are raised above the bolting circle face. This face type allows the use of a wide combination of gasket designs, including flat ring sheet types and metallic composites such as spiral wound and double jacketed types.