Classification of flange gaskets

Non-metallic gasket made of asbestos, rubber, synthetic resin, etc.
Non-metallic gasket gasket coated with a layer of synthetic resin.
Semimetallic gasket Gasket made of metal and non-metallic materials, such as wound gaskets, metal-clad gaskets
a spiral wound gasket A spiral wound gasket made of a non-metallic band with a metal band clip in a V or W cross section
1) inner ring A metal ring set on the inner ring of a wound gasket.
2) outer ring A metal ring set on the outer ring of a wound gasket.
b metal clad
Metal gasket A gasket made of metal such as steel, aluminum, copper, nickel, or Monel.