Type of gasket flange
Non-metallic, semi-metallic, and metal gaskets are the three main types of flange gaskets.
In low pressure, low temperature, and noncritical service applications, non-metallic flange gaskets are employed. To fit in the grooves of the flange face, these flange gaskets are constructed from a soft substance.
Based on the needs of the Product and Service, the Semi Metallic Flange Gasket or Composite Flange Gasket is a blend of metal and nonmetal components. The Spiral wound Flange Gasket, which is appropriate for a wide variety of temperature and pressure Classes, is the most commonly used. A metal outer ring is typically fashioned into a spiral winding with a filler of graphite or PTFE, along with stainless steel or another alloy, to seal the flanged connection when squeezed.
The Metal Flange Gasket, also known as the Ring Type Joint Flange Gasket, is an all-metal gasket used to seal joints made of carbon steel, stainless steel, or other exotic alloys. The RTJ Flange Gaskets are intended for use in demanding situations involving high pressure and high temperature. A rectangular or oval cut groove on the face of the mated flanges receives the RTJ Flange Gasket. These flange gaskets are pressed into the grooves when they are tightened, creating a reliable seal at the flanged connection.