FIELD: machine building.
SUBSTANCE: proposed gas duct comprises two spherical mate flanges with elastomer layer arranged there between, and telescopic moving assembly made up of metal shells jointed with seal ring over entire length. Said shells are protected by heatproof coatings and erosion proof linings. Said composite erosion proof lining has its parts in contact over spherical surface with release coating layer applied thereon. Note here that elastomer layer is made of material identical to that of heatproof coat.
EFFECT: perfected design of gas ducts operated at high temperatures and variable pressures.
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