2 Different Types of Flange Faces Used in Seating Gaskets
Various types of contact surfaces require different flange facings to help to seat the gasket. The flange facings provide the points of contact that are necessary in order to seal the pipe.
Most often flanges are used in large piping such as in refineries and other areas where a mistake can cost a great deal in terms of finances and trust. Forged Components knows the score when it comes to API flange manufacturing and when it comes to flange faces.
Among the different types of flange faces that you may see are:
This is the most commonly used type of facing when it comes to plant applications. It’s easy to see and is easily identified. The surface of the gasket is raised up above the bolt area to allow for different gasket types and designs. The pressure that the flange is rated for is what will determine the degree of raise in the raised face.
The Flat Face, as the name implies, is one that has the surface of the gasket on the exact same plane as the circle for the bolting. Normally flat face flanges are used in mating flanges or when the flange is made from a cast.
They are never supposed to be bolted to a raised face flange at any time. When necessary to connect the flat face to a carbon steel flange, the raised face has to be removed and a full-face gasket must be used instead. If you do not, the thin cast iron may be sprung out into the gap and cause problems.