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GOST 12820 Flanges, GOST 12821 Flanges, GOST 33259 Flange

GOST Flanges are flanges manufactured according to the standards set by the Russian State Standard (GOST), which defines the specifications for flanges used in various industries, particularly in Russia and other former Soviet states. These flanges are available in a range of materials, including carbon steel, stainless steel, and alloy steels, ensuring suitability for different applications, including oil and gas, petrochemical, and waterworks. GOST flanges adhere to rigorous design and manufacturing requirements, providing high-performance solutions that guarantee reliability and durability under extreme pressures and temperatures. They are commonly used in systems requiring secure and leak-proof connections, with specific attention to pressure ratings, dimensions, and material strength. Additionally, GOST flanges are compatible with other international standards, making them versatile for global applications.

Arrow Piping Solutions is a committed to providing high-quality metal products, including GOST Flanges, to a diverse range of industries. Our policy centers on excellence in manufacturing, ensuring that every product meets the most stringent international standards. We follows a customer-first approach, focusing on delivering tailored solutions that meet specific project requirements. We works closely with clients to understand their needs, offering a wide range of materials, dimensions, and customizations. With a robust quality control system, each product undergoes rigorous testing to ensure it meets performance and safety standards. We also emphasizes timely delivery, leveraging a global supply chain and advanced logistics to meet client deadlines. We prides itself on its competitive pricing and exceptional customer support, providing expert guidance to ensure clients choose the right solutions for applications.

GOST Flange

GOST 12820 Slip On Flange, GOST 12821 Weld Neck Flange, GOST / FLAT 12820-80 Flanges, GOST 33259 Flange, GOST 12821-80 Flange, GOST/ГОСТ 12821 Welding Neck Flange.

GOST 12820 Flanges Specifications

SIZE RANGE

15mm (1/2" NPS ) up to 600mm ( 24" NPS ), For 2500# in sizes from NPS 1/2 to NPS 12

STANDARDS / DIMENSION

ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN

PRESSURE CLASS

150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64.

FLANGE FACE TYPE

FF—Flat Face, RF—Raised Face, FM—Female Face, M—Male Face, T—Tongue Face, G—Groove Face, RJ—Ring Joint.

CARBON STEEL

ASTM A105/A105N (SA105N), LTCS A350 LF2, A694

DUPLEX & SUPER DUPLEX

ASTM A182 / ASME SA182 - S31803, S32205, 2205, S32750, S32760, S32950, 2507.

STAINLESS STEEL

ASTM A182 F304, 304L, 304H, 316, 316L, 316H, 317, 317L, 321, 321H, 310, 310S, 347, 904L, etc.

ALLOY STEEL

ASTM A182 / SA182 - F1 / F5 / F9 / F11 / F12 / F22 / F91

MTC

EN 10204 3.2 and EN 10204 3.1, Test Certificates certifying NACE MR0175, NACE MR0103

Flanges ANSI/ASME B16.5 & B16.47
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Materials

➜
Stainless Steel ➜ Carbon Steel ➜ Alloy Steel ➜
Weld Neck Flange Diagram

GOST/ГОСТ 12820 Plane flange/Flat flange (PN6 0.6Mpa)- Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 80 55 19 10 11 4 0,33
20 90 65 26 12 11 4 0,53
25 100 75 33 12 11 4 0,64
32 120 90 39 13 14 4 1,01
40 130 100 46 13 14 4 1,21
50 140 110 59 13 14 4 1,33
65 160 130 78 13 14 4 1,63
80 185 150 91 15 18 4 2,44
100 205 170 110 15 18 4 2,85
125 235 200 135 17 18 8 3,88
150 260 225 161 17 18 8 4,39
200 315 280 222 19 18 8 5,89
250 370 335 273 20 18 12 7,67
300 435 395 325 20 22 12 10,28
350 485 445 377 22 22 12 12,58
400 535 495 426 24 22 16 15,20
500 640 600 530 25 22 16 19,72
600 755 705 630 25 26 20 26,24
800 975 920 820 27 30 24 46,14
1000 1175 1120 1020 31 30 28 64,36
1200 1400 1340 1220 34 33 32 99,03

GOST/ГОСТ 12820 Plane flange/Flat flange (PN16 1.6Mpa) - Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12820 Plane flange/Flat flange (PN25 2.5Mpa)- Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12821 welding neck flange (PN10 1.0Mpa) - Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12821 welding neck flange (PN16 1.6Mpa) - Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12821 welding neck flange (PN25 2.5Mpa) - Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12821 welding neck flange (PN40 4.0Mpa)- Dimensions

+
Dn, MM D, MM D1, MM dB, MM b, MM d, MM n-Ø kg
15 95 65 19 12 14 4 0,61
20 105 75 26 14 14 4 0,86
25 115 85 33 16 14 4 1,17
32 135 100 39 16 18 4 1,58
40 145 110 46 17 18 4 1,96
50 160 125 59 19 18 4 2,58
65 180 145 78 21 18 4 3,42
80 195 160 91 21 18 4 3,71
100 215 180 110 23 18 8 4,73
125 245 210 135 25 18 8 6,38
150 280 240 161 25 22 8 7,81
200 335 295 222 27 22 12 10,10
250 405 355 273 28 26 12 14,49
300 460 410 325 28 26 12 17,78
350 520 470 377 30 26 16 22,88
400 580 525 426 34 30 16 31,00
500 710 650 530 44 33 20 57,01
600 840 770 630 45 39 20 80,03
800 1020 950 820 49 39 24 104,41
1000 1255 1170 1020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

GOST/ГОСТ 12821 welding neck flange (PN63 6.3Mpa)- Dimensions

+
Dn, MM D, MM D1, MM d, MM Dm, MM Dn, MM d1, MM b, MM h4, MM n-Ø kg
15 105 75 14 38 19 12 16 46 4 1,15
20 125 90 18 48 26 18 18 54 4 1,80
25 135 100 18 52 33 25 20 56 4 2,30
32 150 110 22 64 39 31 21 60 4 2,94
40 165 125 22 74 46 37 21 65 4 3,75
50 175 135 22 86 58 47 23 67 4 4,63
65 200 160 22 106 77 64 25 72 8 6,29
80 210 170 22 120 90 77 27 72 8 7,22
100 250 200 26 140 110 94 29 77 8 10,71
125 295 240 30 172 135 118 33 95 8 17,13
150 340 280 33 206 161 142 35 105 8 24,60
200 405 345 33 264 222 198 41 110 12 36,60
250 470 400 39 316 278 246 45 115 12 50,89
300 530 460 39 370 330 294 50 120 16 68,15
350 595 525 39 430 382 342 56 140 16 98,68
400 670 585 45 484 432 386 62 155 16 135,80
500 800 705 52 594 535 485 66 165 20 192,74
600 925 820 56 704 636 585 71 180 20 269,27
800 1165 1050 62 920 826 785 85 225 24 463,87
1000 1415 1290 70 1160 1028 985 92 280 28 980,60
1200 1665 1530 78 1386 1228 1185 95 315 32 1263,72

GOST/ГОСТ 12821 welding neck flange (PN100 10Mpa)- Dimensions

+
Dn, MM D, MM D1, MM d, MM Dm, MM Dn, MM d1, MM b, MM h4, MM n-Ø kg
15 105 75 14 38 19 12 16 46 4 1,15
20 125 90 18 48 26 18 18 54 4 1,80
25 135 100 18 52 33 25 20 56 4 2,30
32 150 110 22 64 39 31 21 60 4 2,94
40 165 125 22 74 46 37 21 65 4 3,75
50 175 135 22 86 58 47 23 67 4 4,63
65 200 160 22 106 77 64 25 72 8 6,29
80 210 170 22 120 90 77 27 72 8 7,22
100 250 200 26 140 110 94 29 77 8 10,71
125 295 240 30 172 135 118 33 95 8 17,13
150 340 280 33 206 161 142 35 105 8 24,60
200 405 345 33 264 222 198 41 110 12 36,60
250 470 400 39 316 278 246 45 115 12 50,89
300 530 460 39 370 330 294 50 120 16 68,15
350 595 525 39 430 382 342 56 140 16 98,68
400 670 585 45 484 432 386 62 155 16 135,80
500 800 705 52 594 535 485 66 165 20 192,74
600 925 820 56 704 636 585 71 180 20 269,27
800 1165 1050 62 920 826 785 85 225 24 463,87
1000 1415 1290 70 1160 1028 985 92 280 28 980,60
1200 1665 1530 78 1386 1228 1185 95 315 32 1263,72

GOST 12821 Flange Standards

GOST 12821 is a Russian standard that defines the specifications for steel welded flanges used in high-pressure applications, particularly for pipelines in various industries. The standard provides guidelines on the design, dimensions, and material properties of flanges to ensure their suitability for high-pressure systems.

1. GOST Standards (Russian)

  • GOST 12820– Flat Flanges for Steel Pipe Joints.
  • GOST 12821 – Steel Welded Flanges for High-Pressure Applications.
  • GOST 33259 – Flange Connections for Industrial Equipment and Pipelines.

WHY Arrow Piping Solutions For GOST Flange Standard!

We are trusted provider for GOST flanges, offering a range of benefits that make us the go-to choice for industries requiring high-quality, reliable flanges.

Competitive Pricing

High-quality GOST flanges at competitive prices for cost-effective solutions.

Customization Options

Custom sizes, pressure ratings, and flange face types for tailored solutions.

Precision Engineering

Advanced manufacturing ensures precise dimensions and leak-proof connections.

Wide Range of Materials

Available in carbon steel, stainless steel, and alloy steel to suit specific project needs.

What is the pressure rating for GOST flanges?

−

The pressure rating of GOST flanges depends on the material, size, and design. GOST 12821, for instance, is specifically designed for high-pressure applications.

Are GOST flanges customizable?

+

Yes, GOST flanges can be customized in terms of size, material, pressure rating, and flange face types to meet specific project requirements.

Where are GOST flanges commonly used?

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GOST flanges are used in industries such as oil and gas, chemical processing, water treatment, and power generation, particularly in countries that follow GOST standards.

AVAILABLE TYPES OF FLANGES

TONGUE AND GROOVE FLANGES

MALE AND FEMALE FLANGES

WELD NECK FLANGES

BLIND FLANGES

Orifice Flange

Socket Weld Flange / SWRF Flange