Korean Flanges

Well-known Korean Flanges Manufacturer In India And KS B1503 Flange Pressure Rating.

Korean Standard Flange

Korean Standard Flange

Korean Flanges Manufacturer

Korean Flanges Manufacturer

KS B1503 10k-16k Flanges

KS B1503 10k-16k Flanges

Gost Standard Flanges

Gost Standard Flanges

Gost 12821 Flange

Gost 12821 Flange

Gost 33259 Flange

Gost 33259 Flange


 

Table of contents

Korean Standard Flange


Material Specification Of Korean Standards Flange, We Deliver High Quality Gost 12821 Flange In Mumbai, India.


Rajtilak Metal is a Dominant S B 1503 5K-40K Flange Manufacturers In India. We offer immediate delivery programs for standard size of Stainless Steel Korean Flanges & ks b 1503 flange. Carbon Steel Korean Flanges can be manufactured as per custom size requirements of our customers. We are also known as Ks B 1503 Flanges supplier with high quality raw material in various sizes. Check Korean Weld Neck Flanges dimensions in Mm.


Korean Standard Flange Specification

Material Specification Of : Korean & Gost Flanges
High Temperature Above 200°C (400°F) For Class 150 Or Above 400°C (750°F)
Low Temperature Above -29 Degree C (−20°F)
Common Types Of Flanges: Slip On (SORF), Weld Neck (WNRF), Blind (BLRF), Lap Joint (Loose), Threaded (NPT), Socket-Weld (SWRF)
Special Types Of Flanges : Nipoflange, Elboflange, Latroflange, Swivel Flanges, Expanding Flanges, Reducing Flanges, Weldoflange
Marking Standard Name of Manufacturer
Schedule
Type of Flange Facing
Nominal Pipe Size
Pressure Class
ASME B16 Designation
Standard Cover : pressure ratings & temperature ratings, materials, marking, dimensions, weight, tolerances, testing
Contact Faces RTJ (Ring Type Joint), FF (Flat Face), RF (Raised Face), T/G (Tongue And Groove ), M/F (Male And Female)
Size Chart Normal Pipe Size 1/2 to NPS 24"
Materials Stainless Steel (Grade 304/L, 316/L), Carbon Steel (ASTM A105 And ASTM A350), Alloy Steel (ASTM A182), Mild Steel, Duplex Steel, Pressure Vessel Steel, Titanium, Super Duplex Steel, Nickel Alloy, Monel, Inconel, Hastelloy, Copper Nickel, Cast Iron, Wrought Iron.
Thickness Normal Pipe Size ≤ 18
Bore Diameter Normal Pipe ≤ 10
Flanges Standards EN 1092-1, JIS, ASME B16.5, ASME B16.47 type A, UNI, DIN
Pressure Rating Class 150 To Class 2500
Bolt Type high strength bolts
medium strength bolts
low strength bolts
European Standard Flanges JIS B2220 Flanges (5k to 30k) and KS1503 flanges
Russian-Standard Flanges GOST 12820 / 12821-80, DIN, UNI, EN 1092-1
South African Standard Flanges SANSflanges And SABS flanges
Surface Finish smooth, concentric serrated, stock
Gaskets Types Full Face Gasket
Flat Ring Gasket
Metallic Ring Gakset
Advantages Of Pipe Flanges Used to Connect Pipe System
Easy Repair Pipe System
Assembled Without Welding

Korean Flanges Dimensions

Korean Flanges Dimensions


KS B1503 5k Flange Dimensions

KS B1503 5k Flange Dimensions

Nominal Diameter of Flanges Outside Diameter of Flanges D flange Sectional Dimensions Size Of Bolt Welding
Diameter of Bolt Circle C Diameter Of raised Face g Inside Dia. Of Flange do Outside Diameter Of Applicable pipe t T Hub Diameter Radius r Raised Face f Hole Diameter Of H Bolt Holes Number
a b W1 W2
10 75 55 39 17.8 17.3 9 – – – – 1 12 4 M10 5 2.5
15 80 60 44 22.2 21.7 9 – – – – 1 12 4 M10 5 3
20 85 65 49 27.7 27.2 10 – – – – 1 12 4 M10 5 3
25 95 75 59 34.5 34 10 – – – – 1 12 4 M10 5 3
32 115 90 70 43.2 42.7 12 – – – – 2 15 4 M12 6 3
40 120 95 75 49.1 48.6 12 – – – – 2 15 4 M12 6 3
50 130 105 85 61.1 60.5 14 2 15 4 M12 6 3
65 155 130 110 77.1 76.3 14 2 15 4 M12 6 4
80 180 145 121 90 89.1 14 2 19 4 M16 6 4
90 190 155 131 102.6 101.6 14 2 19 4 M16 6 4
100 200 165 141 115.4 114.3 16 2 19 8 M16 7 4
125 235 200 176 141.2 139.8 16 2 19 8 M16 7 4
150 265 230 206 166.6 165.2 18 2 19 8 M16 7 5
175 300 260 232 192.1 190.7 18 2 23 8 M20 7.5 5
200 320 280 252 218 216.3 20 2 23 8 M20 8.5 6
225 345 305 277 243.7 241.8 20 2 23 12 M20 9 6
250 385 345 317 269.5 267.4 22 2 23 12 M20 10 6
300 430 390 360 321 318.5 22 3 23 12 M20 10 6
350 480 435 403 358.1 355.6 24 3 25 12 M22 12 7
400 540 495 463 409 406.4 24 3 25 16 M22 12 7
450 605 555 523 460 457.2 24 40 495 500 5 3 25 16 M22 12 7
500 655 605 573 511 508 24 40 546 552 5 3 25 20 M22 12 7
550 720 665 630 562 558.8 26 42 597 603 5 3 27 20 M24 12 7
600 770 715 680 613 609.6 26 44 648 654 5 3 27 20 M24 12 7
650 825 770 735 664 660.4 26 48 702 708 5 3 27 24 M24 12 7
700 875 820 785 715 711.2 26 48 751 758 5 3 27 24 M24 12 7
750 945 880 840 766 762 28 52 802 810 5 3 33 24 M30 12 7
800 995 930 890 817 812.8 28 52 854 862 5 3 33 24 M30 13 8
850 1045 980 940 868 863.6 28 54 904 912 5 3 33 24 M30 13 8
900 1095 1030 990 919 914.4 30 56 956 964 5 3 33 24 M30 13 8
1000 1195 1130 1090 1021 1016 32 60 1058 1066 5 3 33 28 M30 14 9
*(1100) 1305 1240 1200 1123 1117.6 32 3 33 28 M30 　 　
*1200 1420 1350 1305 1225 1219.2 34 – – 3 33 32 M30 　 　
*1350 1575 1505 1460 – 1371.6 34 – – – – 3 33 32 M30 　 　
*1500 1730 1660 1615 – 1524 36 – – – – 3 33 36 M30 　 　

KS B1503 10k Flange Dimensions

KS B1503 10k Flange Dimensions

Nominal Diameter of Flanges Outside Diameter of Flanges D flange Sectional Dimensions Size Of Bolt Welding
Diameter of Bolt Circle C Diameter Of raised Face g Inside DaimeterOf Flange do O.D. Of Applicable pipe t T Hub Diameter Radius r Raised Face f Hole Diameter Of H Bolt Holes Number
a b W1 W2
10 90 65 46 17.8 17.3 12 – – – – 1 15 4 M12 5 2.5
15 95 70 51 22.2 21.7 12 – – – – 1 15 4 M12 5 3
20 100 75 56 27.7 27.2 14 – – – – 1 15 4 M12 5 3
25 125 90 67 34.5 34 14 – – – – 1 19 4 M16 5 3
32 135 100 76 43.2 42.7 16 – – – – 2 19 4 M16 6 3
40 140 105 81 49.1 48.6 16 – – – – 2 19 4 M16 6 3
50 155 120 96 61.1 60.5 16 – – – – 2 19 4 M16 6 3
65 175 140 116 77.1 76.3 18 – – – – 2 19 4 M16 6.5 4
80 185 150 126 90 89.1 18 – – – – 2 19 8 M16 6.5 4
-90 195 160 136 102.6 101.6 18 – – – – 2 19 8 M16 6.5 4
100 210 175 151 115.4 114.3 18 – – – – 2 19 8 M16 7 4
125 250 210 182 141.2 139.8 20 – – – – 2 23 8 M20 7.5 4
150 280 240 212 166.6 165.2 22 – – – – 2 23 8 M20 8 5
-175 305 265 237 192.1 190.7 22 – – – – 2 23 12 M20 9 5
200 330 290 262 218 216.3 22 – – – – 2 23 12 M20 9 6
-255 350 310 282 243.7 241.8 22 – – – – 2 23 12 M20 9 6
250 400 355 324 269.5 267.4 24 36 288 292 6 2 25 12 M22 10 6
300 445 400 368 321 318.5 24 38 340 346 6 3 25 16 M22 10 6
350 490 445 413 358.1 355.6 26 42 380 386 6 3 25 16 M22 12 7
400 560 510 475 409 406.4 28 44 436 442 6 3 27 16 M24 12 7
450 620 565 530 460 457.2 30 48 496 502 6 3 27 20 M24 14 8
500 675 620 585 511 508 30 48 548 554 6 3 27 20 M24 14 8
550 745 680 640 562 558.8 32 52 604 610 6 3 33 20 M30 15 9
600 795 730 690 613 609.6 32 52 656 662 6 3 33 24 M30 16 10
650 845 780 740 664 660.4 34 56 706 712 6 3 33 24 M30 16 10
700 905 840 800 715 711.2 34 58 762 770 6 3 33 24 M30 17 10
750 970 900 855 766 762 36 62 816 824 6 3 33 24 M30 18 11
800 1020 950 905 817 812.8 36 64 868 876 6 3 33 28 M30 19 12
-850 1070 1000 955 868 863.6 36 66 920 928 6 3 33 28 M30 19 12
900 1120 1050 1005 919 914.4 38 70 971 979 6 3 33 28 M30 22 14
1000 1235 1160 1110 1021 1016 40 74 1073 1081 6 3 39 28 M36 22 14
*(1100) 1345 1270 1220 1123 1117.6 42 – – – – 3 39 28 M36 　 　
*1200 1465 1380 1325 1225 1219.2 44 – – – – 3 39 32 M36
*1350 1630 1540 1480 – 1371.6 48 – – – – 3 45 36 M42 　 　
*1500 1795 1700 1635 – 1524 50 – – – – 3 45 40 M42

KS B1503 16k Flange Dimensions

KS B1503 16k Flange Dimensions

Nominal Diameter of Flanges Outside Diameter of Flanges D flange Sectional Dimensions Size Of Bolt
Diameter of Bolt Circle C Diameter Of raised Face g Inside DaimeterOf Flange do O.D. Of Applicable pipe t T Hub Diameter Radius r Raised Face f Hole Diameter Of H Bolt Holes Number
a b
10 90 65 46 17.8 17.3 12 16 26 28 4 1 15 4 M12
15 95 70 51 22.2 21.7 12 16 30 32 4 1 15 4 M12
20 100 75 56 27.7 27..2 14 20 38 42 4 1 15 4 M12
25 125 90 67 34.5 34 14 20 46 50 4 1 19 4 M16
32 135 100 76 43.2 42.7 16 22 56 60 5 2 19 4 M16
40 140 105 81 49.1 48.6 16 24 62 66 5 2 19 4 M16
50 155 120 96 61.1 60.5 16 24 76 80 5 2 19 8 M16
65 175 140 116 77.1 76.3 18 26 94 98 5 2 19 8 M16
80 200 160 132 90 89.1 20 28 108 112 6 2 23 8 M20
-90 210 170 145 102.6 101.6 20 30 120 124 6 2 23 8 M20
100 225 185 160 115.4 114.3 22 34 134 138 6 2 23 8 M20
125 270 225 195 141.2 139.8 22 34 164 170 6 2 25 8 M22
150 305 260 230 166.6 165.2 24 38 196 202 6 2 25 12 M22
200 350 305 275 218 216.3 26 40 244 252 6 2 25 12 M22
250 430 380 345 269.5 267.4 28 44 304 312 6 2 27 12 M24
300 480 430 395 321 318.5 30 48 354 364 8 3 27 16 M24
350 540 480 440 358.1 355.6 34 52 398 408 8 3 33 16 M30X3
400 605 540 495 409 406.4 38 60 446 456 10 3 33 16 M30X3
450 675 605 560 460 457.2 40 64 504 514 10 3 33 20 M30X3
500 730 660 615 511 508 42 68 558 568 10 3 33 20 M30X3
-550 795 720 670 562 558.8 44 70 612 622 10 3 39 20 M36X3
600 845 770 720 613 609.6 46 74 666 676 10 3 39 24 M36X3
-650 895 820 770 664 660.4 48 77 704 726 10 5 39 24 M36X3
700 960 875 820 715 711.2 50 80 754 776 10 5 42 24 M39X3
-750 1020 935 880 766 762 52 83 806 832 10 5 42 24 M39X3
800 1085 990 930 817 812.8 54 86 865 885 10 5 48 24 M45X3
-850 1135 1040 980 868 863.6 56 89 916 936 10 5 48 24 M45X3
900 1185 1090 1030 919 914.4 58 93 968 986 10 5 48 28 M45X3
1000 1320 1210 1140 1021 1016 62 99 1070 1098 12 5 56 28 M52X3
-1100 1420 1310 1240 1123 1117.6 66 105 1180 1200 12 5 56 32 M52X3
1200 1530 1420 1350 1225 1219.2 70 112 1282 1302 12 5 56 32 M52X3

KS B1503 20k Flange Dimensions

KS B1503 20k Flange Dimensions

Nominal Diameter of Flanges Outside Diameter of Flanges D flange Sectional Dimensions Reference
Diameter of Bolt Circle C Diameter Of raised Face g Inside DaimeterOf Flanges do O.D. of Steel pipe t T Hub Diameter Radius r f D Bolt Holes Number Holes Dia. H SIZE Of Bolt S1 M S2 N L
a b
10 90 65 46 17.8 17.3 14 20 30 32 4 1 – 4 15 M12 27 4 27 4 –
15 95 70 51 22.2 21.7 14 20 34 36 4 1 – 4 15 M12 31 4 31 4 –
20 100 75 56 27.7 27.2 16 22 40 42 4 1 – 4 15 M12 37 4 37 4 –
25 125 90 67 34.5 34 16 24 48 50 4 1 　 4 19 M16 44 4 44 4.5 –
32 135 100 76 43.2 42.7 18 26 56 60 5 2 – 4 19 M16 52 4 53 5 –
40 140 105 81 49.1 48.6 18 26 62 66 5 2 – 4 19 M16 58 4 59 5.5 –
50 155 120 96 61.1 60.5 18 26 76 80 5 2 – 8 19 M16 70 4 72 5.5 –
65 175 140 116 77.7 76.3 20 30 100 104 5 2 65.9 8 19 M16 94 6 – – 6
80 200 160 132 90 89.1 22 34 113 117 6 2 78.1 8 23 M20 107 6 – – 6
-90 210 170 145 102.6 101.6 24 36 126 130 6 2 90.2 8 23 M20 120 6 – – 6
100 225 185 160 115.4 114.3 24 36 138 142 6 2 102.3 8 23 M20 132 6 – – 6
125 270 225 195 141.2 139.8 26 40 166 172 6 2 126.6 8 25 M22 160 7 – – 6
150 305 260 230 166.6 165.2 28 42 196 202 6 2 151 12 25 M22 186 8 – – 6
200 350 305 275 218 216.3 30 46 244 252 6 2 199.9 12 25 M22 237 9 – – 6
250 430 380 345 269.5 267.4 34 52 304 312 6 2 248.8 12 27 M24 290 10 – – 6
300 480 430 395 321 318.5 36 56 354 364 8 3 297.9 16 27 M24 345 11 – – 6
350 540 480 440 358.1 355.6 40 62 398 408 8 3 333.4 16 33 M30X3 384 12 – – 6
400 605 540 495 409 406.4 46 70 446 456 10 3 381 16 33 M30X3 437 13 – – 7
450 675 605 560 460 457.2 48 78 504 514 10 3 431.8 20 33 M30X3 490 15 – – 7
500 730 660 615 511 508 50 84 558 568 10 3 482.6 20 33 M30X3 544 16 – – 7
-550 795 720 670 562 558.8 52 90 612 622 10 3 533.4 20 39 M36X3 595 16 – – 7
600 845 770 720 613 609.6 54 96 666 676 10 3 584.2 24 39 M36X3 646 18 – – 7
*650 945 850 790 664 660.4 60 　 　 　 　 5 　 24 48 M45X3 　 　 　 　 　
*700 995 900 840 715 711.2 64 　 　 　 　 5 　 24 48 M45X3 　 　 　 　 　
*750 1080 970 900 766 762 68 　 　 　 　 5 　 24 56 M52X3 　 　 　 　 　
*800 1140 1030 960 817 812.8 72 　 　 　 　 5 　 24 56 M52X3 　 　 　 　 　
*850 1200 1090 1020 868 863.6 74 　 　 　 　 5 　 24 56 M52X3 　 　 　 　 　
*900 1250 1140 1070 919 914.4 76 　 　 　 　 5 　 28 56 M52X3 　 　 　 　 　

Gost /гост 12820 PN16 Plane/ Flat Flange Dimensions (1.6mpa)

gost 12820 flange dimensions

Dn, Millimeter D, Millimeter D1, Millimeter dв, Millimeter b, Millimeter d, Millimeter n-￠ Kilogram
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 1 020 950 820 49 39 24 104,41
1000 1255 1170 1 020 58 45 28 179,37
1200 1485 1390 1220 71 52 32 297,78

Gost /гост 12821 PN16 Welding Neck Flange Dimensions (1.6mpa)

gost 12821 flange dimensions

Dn, Millimeter D, Millimeter D1, Millimeter d, Millimeter Dm, Millimeter Dn, Millimeter d1, Millimeter b, Millimeter h4, Millimeter n-￠ Kilogram
15 95 65 14 30 19 12 12 33 4 0,68
20 105 75 14 38 26 18 12 36 4 0,87
25 115 85 14 45 33 25 12 38 4 1,05
32 135 100 18 55 39 31 13 40 4 1,54
40 145 110 18 64 46 38 13 42 4 1,85
50 160 125 18 76 58 49 13 45 4 2,28
65 180 145 18 94 77 66 15 47 4 3,19
80 195 160 18 110 90 78 17 50 4 4,21
100 215 180 18 130 110 96 17 50 8 4,90
125 245 210 18 156 135 121 19 57 8 6,75
150 280 240 22 180 161 146 19 57 8 8,30
200 335 295 22 240 222 202 21 58 12 11,79
250 405 355 26 292 278 254 23 65 12 17,36
300 460 410 26 346 330 303 24 66 12 22,76
350 520 470 26 400 382 351 28 70 16 32,04
400 580 525 30 450 432 398 32 75 16 43,00
500 710 650 33 559 535 501 38 90 20 70,97
600 840 770 39 660 636 602 41 90 20 99,30
800 1020 950 39 850 826 792 45 95 24 130,57
1 000 1255 1170 45 1060 1 028 992 49 110 28 203,39
1200 1485 1390 52 1268 1228 1192 51 125 32 284,94

Gost /гост 12836 PN16 Blind Flange Dimensions (1.6mpa)

Gost /гост 12836 PN16 Blind Flange Dimensions (1.6mpa)

Normal Pipe Size Weight In Kilogram D D1 Number OF Holes h D4 b D3 D2 h1
15 95 65 45 12 10 14 2 2 4 0.43
20 105 75 58 12 16 14 2 2 4 0.55
25 115 85 68 12 22 14 2 2 4 0.67
32 135 100 78 12 28 18 2 2 4 0.91
40 145 110 88 14 36 18 3 2 4 1.24
50 160 125 102 14 46 18 3 2 4 1.55
65 180 145 122 14 60 18 3 2 4 2.04
80 195 160 138 14 76 18 3 2 4 2.44
100 215 180 158 16 94 18 3 2 8 3.51
125 245 210 188 16 118 18 3 2 8 4.69
150 280 240 212 18 142 23 3 2 8 6.99
200 335 295 268 20 196 23 3 2 12 11.49
250 390 355 320 24 244 27 3 2 12 19.74
300 405 410 378 28 294 27 4 3 12 29.58
350 460 470 438 32 344 27 4 3 16 44.22
400 520 525 490 34 390 30 4 3 16 59.86
500 580 650 610 40 490 33 4 3 20 102.69
600 710 770 720 45 590 40 5 4 20 161.98
800 840 950 900 52 780 40 5 4 24 300.6
1000 1020 1170 1110 63 980 46 5 4 28 542.16
1200 1485 1390 1325 75 1180 52 5 4 32 922.18

(Korean Standards) KS 10k Flange Thickness Calculation For Pressure Vessel And Visit Our Gost 33259 Flange Mill In India.


KS B1503 10K-16K Flanges Schedule Chart

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

Flange Gost 12820 Pressure Rating Class

Gost 12820 Flange Pressure Pressure
Temperature (°C)
Class
Class 150Class 300Class 400Class 600Class 900Class 1500Class 2500
-29 - 38 19.8 51.7 68.9 103.4 155 259 431
50 19.5 51.7 68.9 103.4 155 259 431
100 17.7 51.5 68.7 103.0 155 258 429
150 15.8 50.2 66.8 100.3 151 251 418
200 13.8 48.6 64.8 97.2 146 243 405
250 12.1 46.3 61.7 92.7 139 232 386
300 10.2 42.9 57.0 85.7 129 214 357
325 9.3 41.4 55.0 82.6 124 207 344
350 8.4 40.0 53.4 80.0 120 200 334
375 7.4 37.8 50.4 75.7 114 189 315
400 6.5 34.7 46.3 69.4 104 174 290
425 5.5 28.8 38.4 57.5 86.3 144 240
450 4.6 23.0 30.7 46.0 69.0 115 192
475 3.7 17.1 22.8 34.2 51.3 85.4 142
500 2.8 11.6 15.4 23.2 34.7 57.9 96.5
538 1.4 5.9 7.9 11.8 17.7 29.5 49.2

Gost 33259 Flange Thickness Calculation

Gost 33259 Flange Wall Thickness
NPS (Normal Pipe Sizes) Outside Daimeter (O.D.) Schedule 10 Schedule 20 Schedule 30 STD Wall Schedule 40 Schedule 60 EXT Hvy Schedule 80 Schedule 100 Schedule 120 Schedule 140 Schedule 160 XX Hvy
½ 0.84 0.083 ... ... 0.109 0.109 ... 0.147 0.147 ... ... ... 0.188 0.294
¾ 1.05 0.083 ... ... 0.113 0.113 ... 0.154 0.154 ... ... ... 0.219 0.308
1 1.315 0.109 ... ... 0.133 0.133 ... 0.179 0.179 ... ... ... 0.25 0.358
1 ¼ 1.66 0.109 ... ... 0.14 0.14 ... 0.191 0.191 ... ... ... 0.25 0.382
1 ½ 1.9 0.109 ... ... 0.145 0.145 ... 0.2 0.2 ... ... ... 0.281 0.4
2 2.375 0.109 ... ... 0.154 0.154 ... 0.218 0.218 ... ... ... 0.344 0.436
2 ½ 2.875 0.12 ... ... 0.203 0.203 ... 0.276 0.276 ... ... ... 0.375 0.552
3 3.5 0.12 ... ... 0.216 0.216 ... 0.3 0.3 ... ... ... 0.438 0.6
3 ½ 4 0.12 ... ... 0.226 0.226 ... 0.318 0.318 ... ... ... ... 0.636
4 4.5 0.12 ... ... 0.237 0.237 ... 0.337 0.337 ... 0.438 ... 0.531 0.674
5 5.563 0.134 ... ... 0.258 0.258 ... 0.375 0.375 ... 0.5 ... 0.625 0.75
6 6.625 0.134 ... ... 0.28 0.28 ... 0.432 0.432 ... 0.562 ... 0.719 0.864
8 8.625 0.148 0.25 0.277 0.322 0.322 0.406 0.5 0.5 0.594 0.719 0.812 0.906 0.875
10 10.75 0.165 0.25 0.307 0.365 0.365 0.5 0.5 0.594 0.719 0.844 1 1.125 1
12 12.75 0.18 0.25 0.33 0.375 0.406 0.562 0.5 0.688 0.844 1 1.125 1.312 1
14 14 0.25 0.312 0.375 0.375 0.438 0.594 0.5 0.75 0.938 1.094 1.25 1.406 ...
16 16 0.25 0.312 0.375 0.375 0.5 0.656 0.5 0.844 1.031 1.219 1.438 1.594 ...
18 18 0.25 0.312 0.438 0.375 0.562 0.75 0.5 0.938 1.156 1.375 1.562 1.781 ...
20 20 0.25 0.375 0.5 0.375 0.594 0.812 0.5 1.031 1.281 1.5 1.75 1.969 ...
22 22 0.25 ... ... 0.375 ... ... 0.5 ... ... .... .... .... ....
24 24 0.25 0.375 0.562 0.375 0.688 0.969 0.5 1.219 1.531 1.812 2.062 2.344 ....
26 26 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
30 30 0.312 0.5 0.625 0.375 .... .... 0.5 .... .... .... .... .... ....
36 36 0.312 0.5 0.625 0.375 0.75 .... 0.5 .... .... .... .... .... ....
40 40 .... .... .... 0.375 .... .... 0.5 .... .... .... .... .... ....
42 42 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..
48 48 …….. …….. …….. 0.375 …….. …….. 0.5 …….. …….. …….. …….. …….. ……..

Get Instant Delivery Of (Korean Standards) KS 16k Flange, Check (Russian-Standard) Gost 12821 Flange dimensions In MM.

Gost 12821 Weld Neck Flange Bolt Chart

Class 150 Flanges Class 300 Flanges Class 600 Flanges
NPS # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length # Bolts And Studs Diameter of Bolts And Studs Stud Length
1/16 RF RTJ 1/16 RF RTJ 1/4 RF RTJ
1/2 4 0.50 2-1/4 – 4 0.50 2-1/2 3 4 0.50 3 3
3/4 4 0.50 2-1/2 – 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1 4 0.50 2-1/2 3 4 0.63 3 3-1/2 4 0.63 3-1/2 3-1/2
1-1/4 4 0.50 2-3/4 3-1/4 4 0.63 3-1/4 3-3/4 4 0.63 3-3/4 3-3/4
1-1/2 4 0.50 2-3/4 3-1/4 4 0.75 3-1/2 4 4 0.75 4-1/4 4-1/4
2 4 0.63 3-1/4 3-3/4 8 0.63 3-1/2 4 8 0.63 4-1/4 4-1/4
2-1/2 4 0.63 3-1/2 4 8 0.75 4 4-1/2 8 0.75 4-3/4 4-3/4
3 4 0.63 3-1/2 4 8 0.75 4-1/4 4-3/4 8 0.75 5 5
3-1/2 8 0.63 3-1/2 4 8 0.75 4-1/4 5 8 0.88 5-1/2 5-1/2
4 8 0.63 3-1/2 4 8 0.75 4-1/2 5 8 0.88 5-3/4 5-3/4
5 8 0.75 3-3/4 4-1/4 8 0.75 4-3/4 5-1/4 8 1.00 6-1/2 6-1/2
6 8 0.75 4 4-1/2 12 0.75 4-3/4 5-1/2 12 1.00 6-3/4 6-3/4
8 8 0.75 4-1/4 4-3/4 12 0.88 5-1/2 6 12 1.13 7-1/2 7-3/4
10 12 0.88 4-1/2 5 16 1.00 6-1/4 6-3/4 16 1.25 8-1/2 8-1/2
12 12 0.88 4-3/4 5-1/4 16 1.13 6-3/4 7-1/4 20 1.25 8-3/4 8-3/4
14 12 1.00 5-1/4 5-3/4 20 1.13 7 7-1/2 20 1.38 9-1/4 9-1/4
16 16 1.00 5-1/4 5-3/4 20 1.25 7-1/2 8 20 1.50 10 10
18 16 1.13 5-3/4 6-1/4 24 1.25 7-3/4 8-1/4 20 1.63 10-3/4 10-3/4
20 20 1.13 6-1/4 6-3/4 24 1.25 8 8-3/4 24 1.63 11-1/4 11-1/2
24 20 1.25 6-3/4 7-1/4 24 1.50 9 10 24 1.88 13 13-1/4

Buy Type Of Korean And Gost Standard Flange For Piping Connection

Korean Standard Flange

Korean Standard Flanges

Korean Flanges

Korean Flanges

Ks B1503 10k Flange

Ks B1503 10k Flanges

Ks B1503 Flange

Ks B1503 Flanges

Ks B1503 Blind Flange

Ks B1503 Blind Flanges

Ks B1503 Slip On Flange

Ks B1503 Slip On Flanges

Gost Flange Standards

Gost Flange Standards

Flange Gost 12820

Flange Gost 12820

Gost 33259 Flange

Gost 33259 Flanges

Gost 12821 Flange

Gost 12821 Flanges

Flange Gost 12815

Flange Gost 12815

Ghost Blind Flange

Ghost Blind Flanges


We can supply KS B1503 Flange at best price as we are one of the largest supplier & Korean Flanges Manufacturers in India. We have our stocking distributors in Delhi, Bangalore, Pune (Maharashtra) & Chennai in Tamil Nadu, Surat, (Gujarat), Hyderabad. Check once our Gost 12821 Flange price before buying Gost 12821 Flange from India or China. also mail for our live stock of ASME B16.5 / ANSI B16.47 Korean Flange, KS B 1503 5K-40K Flange to check types & sizes with our ready stock we can give you best price of korean weld neck flange. Rajtilak Metal stock complete range of Korean Standard Flange, DIN 6-40 BAR Flange in Stock in various sizes.


Have A Query? Drop Us An Email

Call Now : +91 9869506920


About Company

We Are EIL And IBR Approved Manufacturer, Exporter, Stockholder, Traders, Dealer, Importer, Wholesaler, Distributor, Supplier of Industrial Pipe Fittings & Flanges, Forgings And Fasteners In Mumbai, India.


Our Official Address

153 / 154, “A” Wing, Siddheshdeep Tower,
Shop No. A-28, Ground Floor, P.B. Marg, Near Navjivan Society,
Mumbai– 400 008 (India).


Telephone & Fax No.

Tel Number : +91 - 22 - 6743 7342,
+91 - 22 - 6659 5135
Fax Number : +91 - 22 - 66595135

Contact our sales representatives in the following countries:
Poland | Malaysia | Singapore | UAE | USA | UK | Philippines | Iran | Italy