- Flange gasket
A flange gasket is a type of
gasket made to fit between two sections ofpipe that are flared to provide higher surface area.Flange gaskets come an a variety of sizes and are categorized by their inside diameter and their outside diameter.
There are many standards in gasket for flanges of pipes. The gaskets for flanges can be divided in major 3 different categories:
#sheet gaskets
#ring gaskets
#spiral wound gasketsSheet gaskets are simple, they are cut to size either with
bolt holes or without holes for standard sizes with various thickness and material suitable to media and temperature pressure of pipeline.Ring gaskets - also known as RTJ. They are mostly used in offshore oil- and gas pipelines and are designed to work under extremely high pressure. They are solid rings of metal in different cross sections like oval, round, octagonal etc. Sometimes they come with hole in center for pressure equalization.
Spiral wound gaskets are also used in high pressure pipelines and are made with
stainless steel outer and inner rings and a center filled with spirally wound stainless steel tape wound together withgraphite andTeflon , formed in V shape. Internal pressure acts upon the faces of the V, forcing the gasket to seal against the flange faces.
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