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Flanges

American Standards
--150 Class Flanges
--300 Class Flanges
British Standard
--Table D
--Table E
--Table F
--Table H
Din Standard
--ND10

Flanges 150 Class



N.B A B C D E F G H J K L M* N O P R T No. of Holes
5 89 11.1 1.6 35 16 30 22.4 9.5 21.3   48 16 16 23.0 60.3 3.0 15.9 4
20 98 12.7 1.6 43 16 38 27.7 11.0 26.7   52 16 16 28.0 69.8 3.0 15.9 4
25 108 14.3 1.6 51 17 49 34.5 12.5 33.4   56 17 17 35.0 79.4 3.0 15.9 4
32 117 15.9 1.6 64 21 59 43.2 14.5 42.2   57 21 21 43.5 88.9 5.0 15.9 4
40 127 17.5 1.6 73 22 65 49.5 16.0 48.3   62 22 22 50.0 98.4 6.5 15.9 4
50 152 19.0 1.6 92 25 78 62.0 17.5 60.3   64 25 25 62.5 120.6 8.0 19.0 4
65 178 22.2 1.6 105 29 90 74.7 19.0 73.0   70 29 29 75.5 139.7 8.0 19.0 4
80 190 23.8 1.6 127 30 108 90.7 20.5 88.9   70 30 30 91.5 152.4 9.5 19.0 4
90 216 23.8 1.6 140 32 122 103.4   101.6   71 32 32 104.0 177.8 9.5 19.0 8
100 229 23.8 1.6 157 33 135 116.1 114.3   76 33 33 117.0 190.0 11.0 19.0 8
125 254 23.8 1.6 186 37 164 143.3 141.3   89 37 37 145.0 215.9 11.0 22.2 8
150 279 25.4 1.6 216 40 192 170.7 168.3   89 40 40 171.0 241.3 12.5 22.2 8
200 343 28.0 1.6 270 44 246 221.5 219.1   102 44 44 222.0 288.4 12.5 22.2 8
250 406 30.2 1.6 324 49 305 276.4 273.0   102 49 49 277.0 362.0 12.5 25.4 12
300 483 34.8 1.6 381 56 365 327.7 323.9   114 56 56 328.0 431.8 12.5 25.4 12
350 533 34.9 1.6 413 57 400 359.2 355.6   127 57 79 360.0 476.2 12.5 28.6 12
400 597 36.5 1.6 470 64 457 410.5 406.4   127 64 87 411.0 539.8 12.5 28.6 16
450 635 39.7 1.6 533 68 505 461.8 457.0   140 68 97 462.0 577.8 12.5 31.8 16
500 698 42.9 1.6 584 73 559 513.1 508.0   144 73 103 514.0 635.0 12.5 31.8 20
600 813 47.6 1.6 692 83 664 616.0 609.6   152 83 111 616.0 749.3 12.5 34.9 20
Note : * Minimum Length
All Dimensions are in as per ASME/ANSI BI6.5 1988

Flanges 300 Class



N.B A B C D E F G H J K L M* N O P R T No. of Holes
15 95 14.3 1.6 35 22 38 22.4 9.5 21.3 23.5 52 16 22 23.0 66.7 3.0 15.9 4
20 117 15.9 1.6 43 25 48 27.7 11.0 26.7 29.0 57 16 25 28.0 82.6 3.0 19.0 4
25 124 17.5 1.6 51 27 54 34.5 12.5 33.4 36.0 62 17 27 35.0 88.9 3.0 19.0 4
32 133 19.0 1.6 64 27 64 43.2 14.5 42.2 44.5 65 21 27 43.5 98.4 5.0 19.0 4
40 156 20.6 1.6 73 30 70 49.5 16.0 48.3 50.5 68 22 30 50.0 114.3 6.5 22.2 4
50 165 22.2 1.6 92 33 84 62.0 17.5 60.3 63.5 70 29 33 62.5 127.0 8.0 19.0 8
65 190 25.4 1.6 105 38 100 74.7 19.0 73.0 76.0 76 32 38 75.5 149.2 8.0 22.2 8
80 210 28.6 1.6 127 43 117 90.7 20.5 88.9 92.0 79 32 43 91.5 168.3 9.5 22.2 8
90 229 30.2 1.6 140 44 133 103.4   101.6 105.0 81 37 44 104.0 184.2 9.5 22.2 8
100 254 31.8 1.6 157 48 146 116.1 114.3 118.0 86 37 48 117.0 200.0 11.0 22.2 8
125 279 34.9 1.6 186 51 178 143.8 141.3 145.0 98 43 51 145.0 235.0 11.0 22.2 8
150 318 36.5 1.6 216 52 206 170.7 168.3 171.0 98 46 52 171.0 269.9 12.5 22.2 12
200 381 41.3 1.6 270 62 260 221.5 219.1 222.0 111 51 62 222.0 330.2 12.5 25.4 12
250 444 47.6 1.6 324 67 321 276.4 273.0 276.0 117 56 95 277.0 387.2 12.5 28.6 16
300 521 50.8 1.6 381 73 375 327.2 323.9 329.0 130 60 102 328.0 450.8 12.5 31.8 16
350 584 54.0 1.6 413 76 425 359.2 355.6 360.0 143 64 111 360.0 514.4 12.5 31.8 20
400 648 57.2 1.6 470 83 483 410.5 406.4 411.0 146 68 121 411.0 571.5 12.5 34.9 20
450 711 60.3 1.6 533 89 533 461.8 457.2 462.0 159 70 130 462.0 628.6 12.5 34.9 24
500 775 63.5 1.6 584 95 587 513.1 508.0 513.0 162 73 140 514.0 685.8 12.5 34.9 24
600 914 69.8 1.6 692 106 702 616.0 609.6 614.0 168 83 152 616.0 812.8 12.5 41.3 24
NOTE : * Minimum Length
All Dimensions are in and as per ASME/ ANSI BI6.5 1988

British Standard 10 Table D


Nominal Pipe Size Approx OD Of Pipe OD Of Flanges P.C.D of Flanges No & Dia of Bolt Thickness Of Flanges
  Table D
15 21.3 95 67 4-14 12
20 26.7 102 73 4-14 12
25 33.4 114 82 4-14 12
32 42.2 121 87 4-14 12
40 48.3 133 98 4-14 12
50 60.3 152 114.3 4-18 12
65 76.2 165 127 4-18 12
80 88.9 184 146 4-18 12
100 114.3 216 178 4-18 12
125 141.3 254 210 8-18 12
150 165,168.3 279 235 8-18 12
200 219.1 336 292 8-18 12
250 273 406 356 8-22 16
300 323.8 457 406 12-22 16
350 355.6 527 470 12-25 20
400 406.4 578 521 12-25 20
450 457 641 584 12-25 22
500 508 704 641 16-25 25
600 610 825 756 16-28 28
Note :
Table ‘D’ for steam working pressure upto 50 lbs.

British Standard 10 Table E


Nominal Pipe Size Approx OD Of Pipe OD Of Flanges P.C.D of Flanges No & Dia of Bolt Thickness Of Flanges
  Table E
15 21.3 95 67 4-14 12
20 26.7 102 73 4-14 12
25 33.4 114 82 4-14 12
32 42.2 121 87 4-14 12
40 48.3 133 98 4-14 12
50 60.3 152 114.3 4-18 12
65 76.2 165 127 4-18 12
80 88.9 184 146 4-18 12
100 114.3 216 178 4-18 12
125 141.3 254 210 8-18 14
150 165,168.3 279 235 8-22 16
200 219.1 336 292 8-22 20
250 273 406 356 12-22 22
300 323.8 457 406 12-25 25
350 355.6 527 470 12-25 25
400 406.4 578 521 12-25 25
450 457 641 584 16-25 28
500 508 704 641 16-25 32
600 610 825 756 16-28 32
Note :
Table ‘E’ for steam working pressure above 50 lbs & upto lbs

British Standard 10 Table F


Nominal Pipe Size Approx OD Of Pipe OD Of Flanges P.C.D of Flanges No & Dia of Bolt Thickness Of Flanges
  Table F
15 21.3 25 67 4-14 9.5
20 26.7 102 73 4-14 9.5
15 21.3 114.3 82 - 9.5
20 26.7 114.3 82 - 9.5
25 33.4 121 87 4-18 9.5
32 42.2 133 98 4-18 12
40 48.3 140 124 4-18 12
50 60.3 165 127 4-18 15
65 76.2 184 146 8-18 15
80 88.9 203 165 8-18 15
100 114.3 229 190 8-18 20
125 141 279 235 8-18 22
150 165,168.3 305 260 12-23 22
200 219.1 368 324 12-23 25
250 273 432 381 12-25 25
300 323.8 489 438 16-25 22
350 - 552 495 16-28 34
400 - 610 552 20-28 40
450 - 673 610 20-32 45
500 - 737 673 24-32 50
600 - 851 781 24-34 56
Note :
Table ‘F’ for steam pressure above 100 lbs & upto 150 lbs.

British Standard 10 Table H


Nominal Pipe Size Approx OD Of Pipe OD Of Flanges P.C.D of Flanges No & Dia of Bolt Thickness Of Flanges
  Table H
15 21.3 25 67 - 12
20 26.7 102 73 - 12
15 21.3 114.3 82 4-18 12
20 26.7 114.3 82 4-18 12
25 33.4 121 87 4-18 14
32 42.2 133 98 4-18 16
40 48.3 140 124 4-18 16
50 60.3 165 127 4-18 20
65 76.2 184 146 8-18 20
80 88.9 203 165 8-18 22
100 114.3 229 190 8-18 22
125 141 279 235 8-22 28
150 165,168.3 305 260 12-22 28
200 219.1 368 324 12-22 32
250 273 432 381 12-25 35
300 323.8 489 438 16-25 40
350 - 552 495 16-28 45
400 - 610 552 20-28 54
450 - 673 610 20-32 60
500 - 737 673 24-32 66
600 - 851 781 24-34 76
Note :
Table ‘H’ for steam working above 150 lbs & upto 250 lbs.

Standard Din – ND 10


Nominal Pipe Size OD Of Flanges Thickness Of Flanges Dia of Raised Face & Thickness No & Size of Holes Bolt Circle Dia Bores
15 95 14 45x2 4-14 65 23
20 105 16 58x2 4-14 75 28.5
25 115 16 68x2 4-14 85 36
32 140 18 78x2 4-18 100 43
40 150 18 88x3 4-18 110 50
50 165 20 102x3 4-18 125 62
65 185 20 122x3 4-18 145 78
80 200 22 138x3 4-18 160 91
100 220 22 158x3 8-18 180 116
125 250 24 188x3 8-18 210 143
150 285 24 212x3 8-23 240 170
200 340 26 268x3 8-23 295 221
250 395 28 320x3 12-23 350 276
300 445 28 370x4 12-23 400 326
350 505 30 430x4 16-23 460 357
400 565 32 482x4 16-27 515 410
450 615 32 532x4 20-27 565 457
500 670 34 585x4 20-27 620 510
600 780 36 685x5 20-30 725 611