The GOST (“Gosudarstvennyy Standart”) a standard that specifies the products meet Russia’s national standards
Fanges made according to Gost standard are widely used in Russia and other countries especially in regions where GOST compliance is required, such as Eastern Europe, and CIS countries. In this article,you would learn more details about the gost standards for flanges
GOST Flange Types
GOST 12821 Weld neck flanges
Gost 12821 specifies the Steel butt – welded flanges (Weld neck flanges) for Pressure from 0.1 to 20.0 MPa (from 1 to 200 kgf/cm²). Design and dimensions,tolerance etc.
Download GOST 12821 pdf here..
- Type: Weld neck flanges.(Steel butt – welded flanges )
- Applications: Used for high-pressure systems, where secure and robust connections are required.
- Design: Typically features a long tapered hub to provide structural reinforcement and reduce stress concentration.
- Pressure Range: PN 2.5 to PN 250.
- Material:
- Carbon steel :СТ20; СТ.3, 09Т2С
- Stainless steel:12Х18Н10Т; 10Х17Н13М2Т,ASTM A182 F304L, F316/316L, F316H, F310, F321 F44
- Alloy steel:ASTM A182 F1, F5a, F9, F11, F12, F22, F91,15Х5М
- Dimension: download GOST 12821 flange dimensions
GOST 12820
GOST 12820 is the standard for Steel plane welded flanges, Pressure from 0.1 to 20.0 MPa (from 1 to 200 kgf/cm²). Design and dimensions,tolerance etc. down load GOST 12820 pdf
- Type: Flat flanges (slip-on type).
- Applications: Low-pressure systems and environments with minimal mechanical stress.
- Design Features: Designed for easy installation and alignment; requires fillet welding.
- Materials:
- Carbon steel :СТ20; СТ.3, 09Т2С
- Stainless steel:12Х18Н10Т; 10Х17Н13М2Т,ASTM A182 F304L, F316/316L, F316H, F310, F321 F44
- Alloy steel:ASTM A182 F1, F5a, F9, F11, F12, F22, F91,15Х5М
- Dimension: download GOST 12820 flange dimensions
GOST 12836-67 Blind Flanges
GOST 12836-67 Steel raised face plugs for flanges(Blind Flange) for Pressure from 1 to 40 kgf/cm2. Design, dimensions and technical requirements
- Type: Steel raised face plugs (Blind flanges Raise face )
- Applications: Used for high-pressure systems, where secure and robust connections are required..
- Pressure Range: PN 2.5 to PN 250.
- Material:
- Carbon steel :СТ20; СТ.3, 09Т2С
- Stainless steel:12Х18Н10Т; 10Х17Н13М2Т,ASTM A182 F304L, F316/316L, F316H, F310, F321 F44
- Alloy steel:ASTM A182 F1, F5a, F9, F11, F12, F22, F91,15Х5М
- Dimension: download GOST 12836 Blind flange dimension and weight
GOST 33259
GOST 33259-2015. Flanges for valves, fittings and pipelines for pressure to PN 250. Design, dimensions and general technical requirements
- Type: General-purpose flanges for pipelines.
- Applications: Low to medium pressure systems such as water supply, gas distribution, and heating systems.
- Flange Types Covered
- Type 01: Plate/flat-face flanges
- Type 11: Weld-neck (butt-weld flanges) (GOST 12821-80)
- Slip-on & Socket-weld: Smooth bore and reinforced hubs
- Lap-joint: Companion flanges for stub-end connections
- Blind: plug for pipeline isolation (GOST 12836-67)
- Spectacle-blind, Spade & Spacer: Dual-plate and two-piece isolation devices
- Pressure Range: pressure PN 6–250
- Materials:
- Carbon steel :СТ20; СТ.3, 09Т2С
- Stainless steel:12Х18Н10Т; 10Х17Н13М2Т,ASTM A182 F304L, F316/316L, F316H, F310, F321 F44
- Alloy steel:ASTM A182 F1, F5a, F9, F11, F12, F22, F91,15Х5М
Steel flanged plugs ATK 24.200.02-90
Flanges for vessels and devices GOST 28759.2-90
GOST R 54432-2011 – flanges of valves, fittings and pipelines for nominal pressure from PN 1 to PN 200. Design, dimensions and general technical requirements;
GOST 9399-81 – steel threaded flanges for PN from 20.0 to 100.0 MPa (200-1000 kgf / cm2). Technical conditions;
GOST 28919-91 – flange connections of wellhead equipment. Types, main parameters and sizes;
GOST 28759.1-4-90 – flanges of vessels and apparatus and gaskets to them. Design and dimensions. Technical requirements;
-GOST 28759.3-90 – steel butt-welded flanges of vessels and apparatus. Design and dimensions;
GOST 28759.4-90 – steel butt-welded flanges of vessels and apparatuses for an octagonal gasket. Design and dimensions;
ATK 26-18-12-96 – threaded flanges for the installation of thermometers, manometers and other measuring instruments for corrosive environments for PN from 4.0 to 16.0 MPa. Design and dimensions.
GOST 12822-80 – loose steel flanges on a welded ring for PN from 0.1 to 2.5 MPa (from 1 to 25 kgf / cm2). Design and dimensions.
