SEAL FOR FLANGED CONNECTION Russian patent published in 2023 - IPC F16J15/12 F16L23/02 

FIELD: flange connections.

SUBSTANCE: design of gaskets for flange connections used in installations and apparatus for operation at both low and high temperatures, at high pressures, in particular, for flanged connections of apparatus and pipelines of oil and gas refineries, apparatus for the production of liquefied natural gas, reactors, heat exchangers and other equipment for thermal and nuclear energy, in the chemical and oil and gas industries and other branches of production. The sealing gasket for the flange connection comprises a sealing ring with a thickness of h₁ made of at least one layer of thermally expanded graphite, along the inner and outer diameters of which the inner and outer obturators are installed. Inside the sealing ring there is a supporting-limiting ring of thickness h₂ made of metal and having concentric teeth on each of its end surfaces, on which a layer of soft sealing material is applied. The sealing ring is covered by a supporting-positioning ring of thickness h₃ made of metal. In this case, the thickness h₁ of the sealing ring is greater than the thickness of the supporting-limiting ring h₂, and the thickness h₂ of the supporting-limiting ring is greater than the thickness of the supporting-positioning ring h₃:h₁>h₂>h₃.

EFFECT: design of the sealing gasket for the flange connection provides resistance to crushing of the sealing gasket, full compensation of the irregularities of the end surfaces of the flanges in contact with the sealing gasket, excludes the possibility of washing the thermally expanded graphite, and, as a result, provides increased tightness of the flange connection.

14 cl, 7 dwg