GOST Flange

A GOST flange, often referred to as a Russian flange, is a type of flange used in industrial piping systems. GOST stands for “Gosudarstvennyy Standart,” which translates to “State Standard” in English. These flanges conform to the standards set by the Russian government and are widely used in Russia and many other countries in the former Soviet bloc.

Key characteristics and features of GOST flanges include:
1. Standardization: GOST flanges adhere to specific standards and dimensions, ensuring compatibility and interchangeability across various industrial applications. This standardization simplifies the design and construction of pipelines.

2. Wide Range of Types: GOST flanges come in various types, including welding neck, slip-on, blind, threaded, and lap joint flanges. Each type is designed for specific applications and has its own unique features.

3. Materials: GOST flanges can be made from different materials, including carbon steel, stainless steel, and various alloys, depending on the requirements of the application and the environmental conditions.

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4. Pressure Ratings: GOST flanges are available in different pressure ratings to accommodate a wide range of system pressures. The pressure rating is often indicated by a set of numbers on the flange, which corresponds to the flange’s pressure class.

5. Gasket Sealing: GOST flanges use gaskets to create a leak-tight seal between two flanges. The choice of gasket material depends on the type of fluid or gas being transported and the operating conditions.

6. Bolt Holes: GOST flanges have a specific number of bolt holes that match the flange’s size and pressure rating. The bolts used to connect the flanges are typically of the same material and grade as the flange itself.

7. Application Versatility: GOST flanges are widely used in various industries, including oil and gas, chemical, petrochemical, and power generation. They are suitable for both high-temperature and low-temperature applications.

8. Corrosion Resistance: GOST flanges made from stainless steel or special alloy materials offer excellent resistance to corrosion, making them suitable for demanding environments.

9. Certification: GOST flanges are often required to meet specific certification and quality control standards to ensure their reliability and performance.

10. Global Acceptance: While initially designed for use in Russia, GOST flanges have gained acceptance worldwide, particularly in countries that have historical ties to the Soviet Union. Their use continues to expand, making them a prevalent choice for industrial applications.

Specification For GOST Flanges

Flange Size Range ½” (15 NB) to 48″ (1200NB), DN10 to DN3000
Flange Type UNI Standard Flanges
Flange Face Types Flat Face Flange (FF), Raised Face Flange (RF), Ring Joint Flange (RTJ), Lap Joint Flange, Male and Female Flange (M&F), Large and Small Tongue-and-Groove Flange (T&G)
Main Types Forged / Threaded / Screwed / Plate
Class / Pressure 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
Connection Type Ring Type Joint, Lap-Joint Face, Raised Face, Flat Face, Large Male-Female, Small Male-Female, Large
In Form SORF, WNRF, BLRF, SWRF, LAP Joint, Threaded, Reducing, Spectacle, etc
Usage Oil Field, Offshore, Water System, Shipbuilding, Natural Gas, Electric Power, Pipe Projects etc.
Gost Flanges
STOCKIST & SUPPILERS FOR GOST Flanges IN INDIA, CUSTOM SIZES GOST SORF, WNRF, Blind Flanges AS PER CLIENT REQUIREMENT

Ready Stock Of GOST Flanges

  • GOST Tongue & Groove Flanges
  • GOST 12821 Weld Neck Flange
  • GOST Socket Weld Flange
  • GOST 12820 RTJ Flange
  • GOST Flange Dimensions
  • Stainless Steel GOST 12815 Flanges
  • SS GOST 33259 Reducing Flanges
  • GOST 12821 SORTJ Flange
  • Duplex Steel GOST Long Weld Neck Flanges
  • Super Duplex Steel GOST Ring Type Joint Flanges
  • Inconel GOST 12820 Flanges
  • Brass GOST Spectacle Blind Flanges
  • Monel GOST 12815 Spacer Ring Flanges
  • GOST 33259  Flanges
  • GOST 12821 Pipe Flange
  • Duplex Stainless Steel GOST Flat Face Flange
  • GOST 12820 Square Flanges
  • Alloy Steel GOST 12815 Raised Face Flanges
  • Nickel Alloy GOST 33259 Orifice Flange
  • GOST 12821 Steel Flanges
  • Chrome Moly Steel GOST 12820 Flange
  • GOST 33259 Large Diameter Flange
  • GOST Industrial Flange
  • Alloy 20 GOST Flange
  • GOST 12821 Forged Flanges
  • GOST 12820 Slip On Flat Face Flanges
  • GOST Screwed Flanges
  • Aluminium Bronze GOST BLRTJ Flanges
  • Tin Bronze GOST 12815 Nipoflange
  • Phosphor Bronze GOST NPT Threaded Flanges
  • Carbon Steel GOST 33259 Female Flanges
  • CS GOST 12821 Plate Flange
  • Hastelloy GOST Flangeolet
  • Titanium GOST Paddle Blank and Spacer
  • AS GOST 12820 SORF Flanges
  • SMO 254 GOST Blind Flange
  • Super Duplex Stainless Steel GOST Exhaust Flanges
  • GOST 12815 SWRTJ Flanges
  • GOST 33259 Custom Flanges
  • Copper Nickel GOST Lap Joint Flanges

GOST Flanges Dimension

Standard Class Diameter Bolt Circle Diameter Number of Bolts Bolt Size Diameter of Bolt Hole
AS4087 PN14 95 67 4 M12 14
AS 2129 Flanges Table C 95 67 4 13 14
Table D 95 67 4 13 14
Table E 95 67 4 13 14
Table F 95 67 4 13 14
Table H 114 83 4 16 17
Table J 114 83 4 16 17
ANSI B16.5 ANSI 150 89 60 4 13 16
ANSI 300 95 67 4 13 16
ANSI 600 95 67 4 13 16
ANSI 900 121 83 4 19 22
ANSI 1500 121 83 4 19 22
ISO 7005 (DIN) Flanges PN6 80 55 4 M10 11
PN10 95 65 4 M12 14
PN16 95 65 4 M12 14
PN20 90 60.5 4 M14 16
PN25 95 65 4 M12 14
PN40 95 65 4 M12 14

Size Chart of GOST Flanges

Nominal Pipe Size Outside Diameter of Flanges Thickness of Flanges Diameter of Raised Face Diameter of Hub at Base Length Thru Hub Diameter or Bore Diameter of Hub at Bevel Radius of Fillet Depth of Socket
Welding Neck Slip-On Threaded Socket Lap Joint Slip-on Socket Lap Joint
O Q R X Y Y Y W B H r Z
1/2 3-1/2 7/16 1-3/8 1-3/16 1-7/8 5/8 5/8 .88 .90 .84 1/8 3/8
3/4 3-7/8 1/2 1-11/16 1-1/2 2-1/16 5/8 5/8 1.09 1.11 1.05 1/8 7/16
1 4-1/4 9/16 2 1-15/16 2-3/16 11/16 11/16 1.36 1.38 1.32 1/8 1/2
1-1/4 4-5/8 5/8 2-1/2 2-5/16 2-1/4 13/16 13/16 1.70 1.72 1.66 3/16 9/16
1-1/2 5 11/16 2-7/8 2-9/16 2-7/16 7/8 7/8 1.95 1.97 1.90 1/4 5/8
2 6 3/4 3-5/8 3-1/16 2-1/2 1 1 2.44 2.46 2.38 5/16 11/16
2-1/2 7 7/8 4-1/8 3-9/16 2-3/4 1-1/8 1-1/8 2.94 2.97 2.88 5/16 3/4
3 7-1/2 15/16 5 4-1/4 2-3/4 1-3/16 1-3/16 3.57 3.60 3.50 3/8 13/16
3-1/2 8-1/2 15/16 5-1/2 4-13/16 2-13/16 1-1/4 1-1/4 4.07 4.10 4.00 3/8 7/8
4 9 15/16 6-3/16 5-5/16 3 1-5/16 1-5/16 4.57 4.60 4.50 7/16 15/16
5 10 15/16 7.5/16 6-7/16 3-1/2 1-7/16 1-7/16 5.66 5.69 5.56 7/16 15/16
6 11 1 8-1/2 7-9/16 3-1/2 1-9/16 1-9/16 6.72 6.75 6.63 1/2 1-1/16
8 13-1/2 1-1/8 10-5/8 9-11/16 4 1-3/4 1-3/4 8.72 8.75 8.63 1/2 1-1/4
10 16 1-3/16 12-3/4 12 4 1-15/16 1-15/16 10.88 10.92 10.75 1/2 1-5/16
12 19 1-1/4 15 14-3/8 4-1/2 2-3/16 2-3/16 12.88 12.92 12.75 1/2 1-9/16
14 21 1-3/8 16-1/4 15-3/4 5 2-1/4 3-1/8 14.14 14.18 14.00 1/2 1-5/8
16 23-1/2 1-7/16 18-1/2 18 5 2-1/2 3-7/16 16.16 16.19 16.00 1/2 1-3/4
18 25 1-9/16 21 19-7/8 5-1/2 2-11/16 3-13/16 18.18 18.20 18.00 1/2 1-15/16
20 27-1/2 1-11/16 23 22 5-11/16 2-7/8 4-1/16 20.20 20.25 20.00 1/2 2-1/8
24 32 1-7/8 27-1/4 26-1/8 6 3-1/4 4-3/8 24.25 24.25 24.00 1/2 2-1/2

Weight Chart of GOST Flanges

Pipe Normal Diam. O.D. Flange Thk. Of Flange Min Diam.
of
Hub
Diameter of Raised Face Length Hub.Y Thread Length Diam.
of Bolt
Circle
Diam.
of Bolt
Holes
Number
of Bolts
Diam. of
Bolts
(inch)
KG LB
inch dn O C X G Y T BC BH BN BD
1/2″ 15 89.00 11.20 30.20 35.10 15.70 15.70 60.50 15.80 4 1/2″ 0.4 0.9
3/4″ 20 98.50 12.70 38.10 42.90 15.70 15.70 69.90 15.80 4 1/2″ 0.7 1.5
1″ 25 108.00 14.20 49.30 50.80 17.50 17.50 79.30 15.80 4 1/2″ 0.8 1.8
1-1/4″ 32 117.50 15.70 58.70 63.50 20.60 20.60 88.90 15.80 4 1/2″ 1.2 2.6
1-1/2″ 40 127.00 17.50 65.00 73.20 22.40 22.40 98.60 15.80 4 1/2″ 1.5 3.3
2″ 50 152.50 19.10 77.70 91.90 25.40 25.40 120.70 19.10 4 5/8″ 2.3 5.1
2-1/2″ 65 178.00 22.40 90.40 104.60 28.40 28.40 139.70 19.10 4 5/8″ 3.7 8.1
3″ 80 190.50 23.90 108.00 127.00 30.20 30.20 152.40 19.10 4 5/8″ 4.1 9
3-1/2″ 90 216.00 23.90 122.20 139.70 31.80 31.80 177.80 19.10 8 5/8″ 5.1 11.2
4″ 100 228.50 23.90 134.90 157.20 33.30 33.30 190.50 19.10 8 5/8″ 5.9 13
5″ 125 254.00 23.90 163.60 185.70 36.60 36.60 215.90 22.40 8 3/4″ 7 15.4
6″ 150 279.50 25.40 192.00 215.90 39.60 39.60 241.30 22.40 8 3/4″ 8.4 18.5
8″ 200 343.00 28.40 246.10 269.70 44.50 44.50 298.50 22.40 8 3/4″ 13 28.6
10″ 250 406.50 30.20 304.80 323.90 49.30 49.30 362.00 25.40 12 7/8″ 18 39.5
12″ 300 482.50 31.80 365.30 381.00 55.60 55.60 431.80 25.40 12 7/8″ 29 64
14″ 350 533.50 35.10 400.10 412.80 57.20 57.20 476.30 28.50 12 1″ 39 86
16″ 400 597.00 36.60 457.20 469.90 63.50 63.50 539.80 28.50 16 1″ 47 103
18″ 450 635.00 39.60 505.00 533.40 68.30 68.30 577.90 31.80 16 1 1/8″ 57 126
20″ 500 698.50 42.90 558.80 584.20 73.20 73.20 635.00 31.80 20 1 1/8″ 76 167
24″ 600 813.00 47.80 663.40 692.20 82.60 82.60 749.30 35.10 20 1 1/4″ 97 214

We Serve Application Industry

Flanges applications are as diverse as the industries they serve driven primarily by the aerospace, railway, construction and automotive industries with petrochemical, nuclear, medical, Oil & Gas, Chemical, Pharmaceutical, Food & Beverage, Nuclear, Thermal Power plants, Paper and Pulp, marine and mining, etc.

We Export GOST Flanges Across the Globe

Algeria, Nigeria, Yemen, Zimbabwe, Ireland, Ghana, Bolivia, Ecuador, Puerto Rico, Nigeria, Sweden, Gabon, Kazakhstan, Libya, Italy, Iraq, South Africa, Israel, Bulgaria, Finland, New Zealand, Angola, Morocco, Afghanistan, Peru, Japan, Chile, Turkey, Mongolia, Vietnam, Indonesia, Spain, Bahrain, Croatia, Egypt, Norway, Australia, Tibet, GOSTted States, Slovakia, Sri Lanka, Gambia, Qatar, Oman, Mexico, GOSTted Kingdom, South Korea, Thailand, Macau, Kenya, France, Lithuania, Bangladesh, Estonia, Russia, India, Taiwan, Greece, Germany, GOSTted Arab Emirates, Lebanon, Ukraine, China, Czech Republic, Namibia, Hungary, Poland, Iran, Kuwait, Switzerland, Jordan, Philippines, Portugal, Serbia, Belgium, Belarus, Pakistan, Singapore, Venezuela, Hong Kong, Trinidad & Tobago, Austria, Nepal, Argentina, Bhutan, Brazil, Romania, Mexico, Poland, Denmark, Canada, Colombia, TGOSTsia, Azerbaijan, Costa Rica, Chile, Iran, Malaysia, Netherlands, Saudi Arabia.

Domestic Supply GOST Flanges

Thiruvananthapuram, Mumbai, Gurgaon, Pimpri-Chinchwad, Kanpur, Noida, Colombo, Vadodara, Ahmedabad, Ranchi, Rajkot, Faridabad, Thane, Indore, Chandigarh, Surat, Coimbatore, Nashik, Navi Mumbai, Jaipur, Bhopal, Howrah, Baroda, Chennai, New Delhi, Ernakulam, Pune, Secunderabad, Nagpur, Ludhiana, Visakhapatnam, Hyderabad, Haryana, Bengaluru, Jamshedpur, Kolkata.

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