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Gost 28919 - Flanges
This standard applies to flange connections with steel ring gaskets of octagonal section, designed to connect components of wellhead oilfield equipment for operating pressure from 14 to 140 MPa and nominal bore from 50 to 680 mm, as well as flanges, gaskets, studs and nuts of flange connections.
Gost 12821 - Flanges
This standard applies to steel butt-welded flanges for fittings, fittings, machines, instruments, apparatus, tanks and pipelines for nominal pressure.
Gost 12820 - Flanges
This standard applies to steel flat welded flanges for fittings, fittings, machines, instruments, apparatus, tanks and pipelines for nominal pressure.
Gost 9399 - Flanges
This standard applies to steel threaded flanges used in the chemical and petrochemical industries for fittings, fittings and pipelines with a lens seal.
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