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MITECH FLANGE TABLE GUIDE Nominal Size - 25mm (1") Nominal Size - 32mm (1 1/4") Nominal Size - 40mm (1 1/2") Nominal Size - 50mm (2") Nominal Size - 65mm (2 1/2") Nominal Size - 80mm (3") Nominal Size - 100mm (4") Nominal Size - 125mm (5")
Nominal Size - 150mm (6") Nominal Size - 200mm (8") Nominal Size - 250mm (10") Nominal Size - 300mm (12") Nominal Size - 350mm (14") Nominal Size - 400mm (16") Nominal Size - 450mm (18") Nominal Size - 500mm (20") Nominal Size - 600mm (24")
Flange Table Nominal Size 25mm (1 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M10 11 60 2 14 M12 14 68 2 16 M12 14 68 2 16 8 18 M12 14 68 2 18 9 18 M12 14 68 2 11 18 M16 18 68 2 24 M16 18 68 2 24 M16 18 68 2 24 M20 22 68 2 28
Diameter of flange
Bolt circle number
Number of bolts
BS 4504
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
100 115 115 115 115 140 140 140 150
75 85 85 85 85 100 100 100 105
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1500
108 124 124 149 149
79 89 89 102 102
4 4 4 4 4
13 16 16 22 22
16 19 19 25 26
51 51 51 51 51
2 2 6 6 6
11 -
10 15 -
11 17 17 29 29
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
114 114 114 121 121 121 127 127 140 146
83 83 83 87 87 87 95 95 102 108
4 4 4 4 4 4 4 4 4 4
13 13 13 16 16 16 16 16 19 19
14 14 14 17 17 17 17 17 22 22
64 64 76 76 76 76
2 2 2 2 2 2
13 13 13 13 19 -
8 8 8 10 11 19 22 -
10 10 10 14 19 22 22 25 29
Flange Table Nominal Size 32mm (1¼ in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 70 2 16 M16 18 78 2 18 M16 18 78 2 18 8 18 M16 18 78 2 20 9 18 M16 18 78 2 11 18 M20 22 78 2 26 M20 22 78 2 26 M20 22 78 2 26 M20 22 78 2 32
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
120 140 140 140 140 155 155 155 165
90 100 100 100 100 110 110 110 120
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
117 133 133 159 159
89 98 98 111 111
4 4 4 4 4
13 16 16 22 22
16 19 19 25 25
64 64 64 64 64
2 2 6 6 6
13 -
10 16 -
13 19 21 29 29
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
121 121 121 133 133 133 133 133 146 159
87 87 87 98 98 98 98 98 114 121
4 4 4 4 4 4 4 4 4 4
13 13 13 16 16 16 16 16 19 22
14 14 14 17 17 17 17 17 22 25
76 76 76 76 83 83
2 2 2 2 2 2
16 16 16 16 22 -
8 8 8 10 11 19 22 -
13 13 13 17 19 22 22 29 32
BS 4504
Flange Table Nominal Size 40mm (1½ in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 80 3 16 M16 18 88 3 18 M16 18 88 3 18 9 18 M16 18 88 3 20 11 18 M16 18 88 3 13 18 M20 22 88 3 28 M20 22 88 3 28 M20 22 88 3 28 M24 26 88 3 34
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
130 150 150 150 150 170 170 170 185
100 110 110 110 110 125 125 125 135
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class600 Class 900 Class 1 500
127 156 156 178 178
98 114 114 124 124
4 4 4 4 4
13 19 19 125 25
16 22 22 29 29
73 73 73 73 73
-2 -2 -6 -6 -6
14 -
11 17 -
14 21 22 32 32
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
133 133 133 140 140 140 152 152 159 171
98 98 98 105 105 105 105 114 121 133
4 4 4 4 4 4 4 4 4 8
13 13 13 16 16 16 19 19 19 19
14 14 14 17 17 17 22 22 22 22
83 83 89 89 89 89
2 2 2 2 2 2
16 16 16 16 22 -
10 10 10 11 13 22 25 -
13 13 13 17 22 25 25 29 35
BS 4504
Flange Table Nominal Size 50mm (2 in) Thickness of flange Cast and Grey cast Copper forged Diameter of Diameter of Diameter of Height of iron alloy steel bolts holes raised face raised face M12 14 90 3 10 M16 18 102 3 20 M16 18 102 3 20 11 20 M16 18 102 3 22 11 20 M16 18 102 3 13 20 M20 22 102 3 26 M24 26 102 3 30 M24 26 102 3 30 M24 26 102 3 38
Diameter of flange 140 165 165 165 165 180 195 195 200
Bolt circle number 110 125 125 125 125 135 145 145 150
Number of bolts 4 4 4 4 4 4 4 4 8
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
152 165 165 216 216
121 127 127 165 165
4 8 8 8 8
16 16 16 22 22
19 19 19 25 25
92 92 92 92 92
2 2 6 6 6
16 -
13 19 -
(16 (22 2 38 38
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
152 152 152 165 165 165 165 165 171 184
114 114 114 127 127 127 127 127 133 146
4 4 4 4 4 4 8 8 8 8
16 16 16 16 16 19 16 18 19 19
17 17 17 17 17 22 17 17 22 22
102 102 102 102 89 102
2 2 2 2 2 2
16 17 19 19 125 -
10 10 10 11 13 25 25 -
14 14 16 19 25 25 25 32 35
BS 4504
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
Flange Table Nominal Size 65mm (2½ in)
BS 4504
ANSI
BS 10
Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 110 3 16 M16 18 122 3 20 M16 18 122 3 20 13 18 M16 18 122 3 24 13 22 M16 18 122 3 14 22 M20 22 122 3 26 M24 26 122 3 34 M24 26 122 3 34 M24 26 122 3 42
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
160 185 185 185 185 205 220 220 230
130 145 145 145 145 160 170 170 180
4 4 4 8 8 8 8 8 8
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
178 191 191 244 244
140 149 149 191 191
4 8 8 8 8
16 19 19 25 25
19 22 22 29 29
105 105 105 105 105
2 2 6 6 6
17 -
14 21 -
17 25 29 41 41
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
165 165 165 184 184 184 184 184 184 203
127 127 127 146 146 146 146 146 146 165
4 4 4 8 8 8 8 8 8 8
16 16 16 16 16 19 19 19 19 22
17 17 17 17 17 22 22 22 22 25
114 114 114 114 102 114
2 2 2 2 2 2
17 17 19 19 25 -
11 11 11 13 14 25 29 -
14 14 16 19 25 29 29 32 41
Flange Table Nominal Size 80mm (3 in) Thickness of flange Number of Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts bolts holes raised face raised face forged iron alloy steel 4 M16 18 128 3 18 8 M16 18 138 3 22 8 M16 18 138 3 22 13 20 8 M16 18 138 3 26 14 24 8 M16 18 138 3 16 24 8 M20 22 138 3 28 8 M24 26 138 3 36 8 M24 26 138 3 36 8 M27 30 138 3 46
Diameter of flange
Bolt circle number
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
190 200 200 200 200 215 230 230 255
150 160 160 160 160 170 180 180 200
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
191 210 210 241 267
152 168 168 190 203
4 8 8 8 8
16 19 19 22 29
19 22 22 25 32
127 127 127 127 127
2 2 6 6 6
19 -
16 23 -
19 29 32 38 48
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
184 184 184 203 203 203 203 203 203 235
146 146 146 165 165 165 165 165 165 191
4 4 4 8 8 8 8 8 8 8
16 16 16 16 16 19 19 19 22 25
17 17 17 17 17 22 22 22 25 29
127 127 127 127 114 127
2 2 2 2 2 2
17 19 19 19 29 -
13 13 13 14 16 32 32 -
14 14 16 22 32 32 32 35 48
BS 4504
Flange Table Nominal Size 100mm (4 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 148 3 18 M16 18 158 3 24 M16 18 158 3 24 16 20 M20 22 162 3 28 17 24 M20 22 162 3 19 24 M24 26 162 3 30 M27 30 162 3 40 M27 30 162 3 40 M30 33 162 3 54
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
210 220 220 235 235 250 265 265 300
170 180 180 190 190 200 210 210 235
4 8 8 8 8 8 8 8 8
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
229 254 273 292 311
191 200 216 235 241
8 8 8 8 8
16 19 22 29 32
19 22 25 32 35
157 157 157 157 157
2 2 6 6 6
24 -
17 27 -
24 32 38 44 54
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
216 216 216 229 229 229 241 241 248 286
178 178 178 191 191 191 197 197 203 235
4 4 8 8 8 8 8 8 8 8
16 16 16 16 16 19 22 22 25 29
17 17 17 17 17 22 25 25 29 32
152 152 152 152 159 159
2 2 2 2 2 2
19 19 22 22 32 -
16 16 16 17 19 35 35 -
17 17 19 25 35 35 35 41 57
BS 4504
BS 4504
Flange Table Nominal Size 125mm (5 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 178 3 20 M16 18 188 3 26 M16 18 188 3 26 22 M24 26 188 3 30 26 M24 26 188 3 26 M27 30 188 3 34 M30 33 188 3 40 M30 33 188 3 44 M30 33 188 3 60
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
240 250 250 270 270 295 315 315 340
200 210 210 220 220 240 250 250 275
8 8 8 8 8 8 8 8 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
254 279 330 349 375
216 235 267 279 292
8 8 8 8 8
19 19 25 32 38
22 22 29 35 41
186 186 186 186 186
2 2 6 6 6
24 -
19 29 -
24 35 44 51 73
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
254 254 254 279 279 279 279 279 286 324
210 210 210 235 236 235 235 235 235 273
4 8 8 8 8 8 12 12 12 12
16 16 16 19 19 22 22 22 22 29
17 17 17 22 22 25 25 25 25 32
178 178 178 178 19 210
2 2 2 2 2 2
19 21 22 25 35 -
17 17 17 19 22 38 41 -
17 17 22 29 38 41 41 44 67
BS 4504
Flange Table Nominal Size 150mm (6 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 202 3 20 M20 22 212 3 26 M20 22 212 3 26 22 M24 26 218 3 34 28 M24 26 218 3 28 M30 33 218 3 36 M30 33 218 3 44 M30 33 218 3 50 M33 36 218 3 68
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
265 285 285 300 300 345 355 355 390
225 240 240 250 250 280 290 290 320
8 8 8 8 8 8 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
279 318 356 381 394
241 270 292 318 318
8 12 12 12 12
19 19 25 29 35
22 22 29 32 38
216 216 216 216 216
2 2 6 6 6
25 -
21 30 -
25 37 48 56 83
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
279 279 279 305 306 305 305 305 324 375
235 235 235 260 260 260 260 260 273 318
4 8 8 12 12 12 12 12 12 12
16 16 19 19 19 22 22 22 25 32
17 17 22 22 22 25 25 25 29 35
210 210 210 210 210 229
2 2 2 2 2 2
21 21 22 25 35 -
17 17 17 22 25 38 41 -
17 17 22 29 38 41 44 51 73
BS 4504
Flange Table Nominal Size 200mm (8 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 258 3 22 M20 22 268 3 26 M20 22 268 3 30 24 M24 26 278 3 34 30 M27 30 285 3 34 M33 36 285 3 42 M33 36 285 3 52 M33 36 285 3 60 M39 42 285 3 82
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
320 340 340 360 375 415 430 430 485
280 295 295 310 320 345 360 360 400
8 8 12 12 12 12 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
343 381 419 470 483
298 330 349 394 394
8 12 12 12 12
19 22 29 35 41
22 25 32 38 44
270 270 270 270 270
2 2 6 6 6
29 -
24 35 -
29 41 56 64 92
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
337 337 337 368 368 368 368 368 413 476
292 292 292 324 324 324 318 324 356 406
8 8 8 12 12 12 12 12 12 12
16 16 19 19 19 22 25 25 32 38
17 17 22 22 22 25 29 29 35 41
260 260 260 260 273 298
2 2 2 2 2 2
22 22 25 29 38 -
19 19 19 25 32 41 48 -
19 19 25 32 41 48 51 64 89
BS 4504
Flange Table Nominal Size 250mm (10 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 312 3 24 M20 22 320 3 28 M24 26 320 3 32 26 M27 30 335 3 36 32 M30 33 345 3 38 M33 36 345 3 24 M36 39 345 3 60 M39 42 345 3 68 M45 48 345 3 100
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
375 395 404 426 450 470 505 515 585
335 350 355 370 385 400 430 430 490
12 12 12 12 12 12 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
406 445 508 546 584
362 387 432 470 483
12 16 16 16 12
22 25 32 35 41
25 29 35 38 51
324 324 324 324 324
2 2 6 6 6
30 -
25 -
30 41 64 70 108
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
406 406 406 432 432 432 432 432 483 559
358 356 356 381 381 381 381 387 425 489
8 8 12 12 12 12 16 16 16 16
19 19 19 22 22 25 25 25 32 38
22 22 22 25 25 29 29 29 35 41
311 311 311 311 330 356
2 2 2 2 2 2
24 25 25 29 41 -
19 19 22 25 35 -
19 22 25 35 48 51 57 73 108
BS 4504
Flange Table Nominal Size 300mm (12 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 365 4 24 M20 22 370 4 28 M24 26 378 4 32 28 M27 30 395 4 40 34 M30 33 410 4 42 M33 36 410 4 52 M39 42 410 4 68 M39 42 410 4 78 M48 52 410 4 120
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
440 445 460 485 515 530 585 585 690
395 400 410 430 450 460 500 500 590
12 12 12 16 16 16 16 16 16
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
483 521 559 610 673
432 451 489 533 572
12 16 20 20 16
22 29 32 35 51
25 32 35 38 54
381 381 381 381 381
2 2 6 6 6
32 -
27 -
32 51 67 80 124
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
457 457 457 489 489 489 489 508 578 654
406 406 406 438 438 438 432 457 508 572
8 12 12 16 16 16 16 16 16 16
19 19 22 22 22 25 29 29 38 44
22 22 25 25 25 29 32 32 41 48
362 362 362 362 381 413
2 2 2 2 2 2
24 25 29 32 44 -
22 22 25 29 38
22 25 29 38 51 22 64 83 121
BS 4504
57 -
Flange Table Nominal Size 350mm (14 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 415 4 26 M20 22 430 4 30 M24 26 438 4 36 30 M30 33 450 4 44 38 M33 36 465 4 46 M36 39 465 4 56 M45 48 465 4 74 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
490 505 520 555 580 600 655 -
445 460 470 490 510 525 560 -
12 16 16 16 16 16 16 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
533 584 603 641 749
476 514 527 559 635
12 20 20 20 16
25 29 35 38 57
29 32 38 41 60
413 413 413 413 413
2 2 6 6 6
35 -
-
35 54 70 86 133
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
527 527 527 552 552 552 572 584 648 -
470 470 470 495 495 495 508 527 578 -
8 12 12 16 16 16 16 16 20 -
22 22 22 25 25 29 32 32 38 -
25 25 25 29 29 32 35 35 41 -
419 419 419 419 438 -
2 2 2 2 2 -
25 29 32 36 48 -
25 25 25 32 41 -
25 25 32 41 54 60 70 95 -
BS 4504
Flange Table Nominal Size 400mm (16 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 465 4 28 M24 26 482 4 32 M27 30 490 4 38 32 M33 36 505 4 48 40 M36 39 535 4 50 M39 42 535 4 60 M45 48 535 4 78 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
540 565 580 620 660 670 715 -
495 515 525 550 585 585 620 -
16 16 16 16 16 16 16 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
597 648 686 705 826
540 572 603 616 705
16 20 20 20 16
25 32 38 41 64
29 35 41 44 67
470 470 470 470 470
2 2 6 6 6
37 -
-
37 57 76 89 146
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
578 578 578 610 610 610 629 641 743 -
521 521 521 552 552 552 565 584 660 -
12 12 12 20 20 20 20 20 20 -
22 22 22 25 25 29 32 32 44 -
25 25 25 29 29 32 35 35 48 -
483 483 483 483 495 -
2 2 2 2 2 -
27 29 32 35 51 -
25 25 25 32 44 -
25 25 32 44 57 67 76 108 -
BS 4504
Flange Table Nominal Size 450mm (18 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper raised face raised face bolts holes forged iron alloy steel M20 22 520 4 30 M24 26 532 4 32 M27 30 550 4 40 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
595 616 640 -
550 565 585 -
16 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
635 711 743 787 914
578 629 654 686 775
16 24 20 20 16
29 32 41 48 70
32 35 44 51 73
533 533 533 533 533
2 2 6 6 6
40 -
-
40 60 83 102 162
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
641 641 641 673 673 673 718 737 -
584 584 584 610 610 610 664 673 -
12 12 16 20 20 20 20 20 -
22 22 22 29 29 32 35 35 -
25 25 25 32 32 35 38 38 -
533 533 572 572 -
2 2 2 2 -
27 32 35 38 54 -
27 29 29 35 48 -
29 29 35 48 60 76 83 -
BS 4054
Flange Table Nominal Size 500mm (20 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper raised face raised face bolts holes forged iron alloy steel M20 22 570 4 30 M24 26 585 4 34 M30 33 610 4 42 36 M33 36 615 4 62 44 M39 42 615 4 52 M45 48 615 4 68 M52 56 615 4 94 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
645 670 715 730 755 800 870 -
600 620 650 660 670 705 760 -
20 20 20 20 20 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
699 775 813 857 984
635 686 724 749 832
20 24 24 20 16
29 32 41 51 76
32 35 44 54 79
584 584 584 584 584
2 2 6 6 6
43 -
-
43 64 89 108 178
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
705 705 705 737 737 737 787 806 -
641 641 641 673 673 673 711 730 -
12 16 16 24 24 24 20 20 -
22 22 22 29 29 32 38 38 -
25 25 25 32 32 35 41 41 -
597 597 622 622 -
2 2 2 2 -
29 32 38 41 57 -
29 32 32 38 51 -
32 32 38 51 64 83 89 -
BS 4504
Flange Table Nominal Size 600mm (24 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M24 26 670 5 30 M27 30 685 5 36 M33 36 725 5 48 40 M36 39 720 5 46 M45 48 735 5 60 M52 56 735 4 76 M56 62 735 4 104 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
755 780 840 845 890 930 990 -
705 725 770 770 795 820 875 -
20 20 20 20 20 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
813 914 940 1041 1168
749 813 838 902 991
20 24 24 20 16
32 38 48 64 89
35 41 51 67 92
692 692 692 692 692
2 2 6 6 6
48 -
-
48 70 102 140 203
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
826 826 826 851 851 851 -
756 756 756 781 781 781 -
12 16 16 24 24 24 -
25 25 29 32 32 35 -
29 29 32 35 35 38 -
699 699 -
2 2 -
30 35 41 44 64 -
30 35 38 41 57 -
35 38 41 57 70 -
BS 4504
Nominal Size - 150mm (6") Nominal Size - 200mm (8") Nominal Size - 250mm (10") Nominal Size - 300mm (12") Nominal Size - 350mm (14") Nominal Size - 400mm (16") Nominal Size - 450mm (18") Nominal Size - 500mm (20") Nominal Size - 600mm (24")
Flange Table Nominal Size 25mm (1 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M10 11 60 2 14 M12 14 68 2 16 M12 14 68 2 16 8 18 M12 14 68 2 18 9 18 M12 14 68 2 11 18 M16 18 68 2 24 M16 18 68 2 24 M16 18 68 2 24 M20 22 68 2 28
Diameter of flange
Bolt circle number
Number of bolts
BS 4504
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
100 115 115 115 115 140 140 140 150
75 85 85 85 85 100 100 100 105
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1500
108 124 124 149 149
79 89 89 102 102
4 4 4 4 4
13 16 16 22 22
16 19 19 25 26
51 51 51 51 51
2 2 6 6 6
11 -
10 15 -
11 17 17 29 29
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
114 114 114 121 121 121 127 127 140 146
83 83 83 87 87 87 95 95 102 108
4 4 4 4 4 4 4 4 4 4
13 13 13 16 16 16 16 16 19 19
14 14 14 17 17 17 17 17 22 22
64 64 76 76 76 76
2 2 2 2 2 2
13 13 13 13 19 -
8 8 8 10 11 19 22 -
10 10 10 14 19 22 22 25 29
Flange Table Nominal Size 32mm (1¼ in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 70 2 16 M16 18 78 2 18 M16 18 78 2 18 8 18 M16 18 78 2 20 9 18 M16 18 78 2 11 18 M20 22 78 2 26 M20 22 78 2 26 M20 22 78 2 26 M20 22 78 2 32
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
120 140 140 140 140 155 155 155 165
90 100 100 100 100 110 110 110 120
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
117 133 133 159 159
89 98 98 111 111
4 4 4 4 4
13 16 16 22 22
16 19 19 25 25
64 64 64 64 64
2 2 6 6 6
13 -
10 16 -
13 19 21 29 29
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
121 121 121 133 133 133 133 133 146 159
87 87 87 98 98 98 98 98 114 121
4 4 4 4 4 4 4 4 4 4
13 13 13 16 16 16 16 16 19 22
14 14 14 17 17 17 17 17 22 25
76 76 76 76 83 83
2 2 2 2 2 2
16 16 16 16 22 -
8 8 8 10 11 19 22 -
13 13 13 17 19 22 22 29 32
BS 4504
Flange Table Nominal Size 40mm (1½ in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 80 3 16 M16 18 88 3 18 M16 18 88 3 18 9 18 M16 18 88 3 20 11 18 M16 18 88 3 13 18 M20 22 88 3 28 M20 22 88 3 28 M20 22 88 3 28 M24 26 88 3 34
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
130 150 150 150 150 170 170 170 185
100 110 110 110 110 125 125 125 135
4 4 4 4 4 4 4 4 4
ANSI
Class 125/150 Class 300 Class600 Class 900 Class 1 500
127 156 156 178 178
98 114 114 124 124
4 4 4 4 4
13 19 19 125 25
16 22 22 29 29
73 73 73 73 73
-2 -2 -6 -6 -6
14 -
11 17 -
14 21 22 32 32
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
133 133 133 140 140 140 152 152 159 171
98 98 98 105 105 105 105 114 121 133
4 4 4 4 4 4 4 4 4 8
13 13 13 16 16 16 19 19 19 19
14 14 14 17 17 17 22 22 22 22
83 83 89 89 89 89
2 2 2 2 2 2
16 16 16 16 22 -
10 10 10 11 13 22 25 -
13 13 13 17 22 25 25 29 35
BS 4504
Flange Table Nominal Size 50mm (2 in) Thickness of flange Cast and Grey cast Copper forged Diameter of Diameter of Diameter of Height of iron alloy steel bolts holes raised face raised face M12 14 90 3 10 M16 18 102 3 20 M16 18 102 3 20 11 20 M16 18 102 3 22 11 20 M16 18 102 3 13 20 M20 22 102 3 26 M24 26 102 3 30 M24 26 102 3 30 M24 26 102 3 38
Diameter of flange 140 165 165 165 165 180 195 195 200
Bolt circle number 110 125 125 125 125 135 145 145 150
Number of bolts 4 4 4 4 4 4 4 4 8
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
152 165 165 216 216
121 127 127 165 165
4 8 8 8 8
16 16 16 22 22
19 19 19 25 25
92 92 92 92 92
2 2 6 6 6
16 -
13 19 -
(16 (22 2 38 38
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
152 152 152 165 165 165 165 165 171 184
114 114 114 127 127 127 127 127 133 146
4 4 4 4 4 4 8 8 8 8
16 16 16 16 16 19 16 18 19 19
17 17 17 17 17 22 17 17 22 22
102 102 102 102 89 102
2 2 2 2 2 2
16 17 19 19 125 -
10 10 10 11 13 25 25 -
14 14 16 19 25 25 25 32 35
BS 4504
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
Flange Table Nominal Size 65mm (2½ in)
BS 4504
ANSI
BS 10
Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M12 14 110 3 16 M16 18 122 3 20 M16 18 122 3 20 13 18 M16 18 122 3 24 13 22 M16 18 122 3 14 22 M20 22 122 3 26 M24 26 122 3 34 M24 26 122 3 34 M24 26 122 3 42
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
160 185 185 185 185 205 220 220 230
130 145 145 145 145 160 170 170 180
4 4 4 8 8 8 8 8 8
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
178 191 191 244 244
140 149 149 191 191
4 8 8 8 8
16 19 19 25 25
19 22 22 29 29
105 105 105 105 105
2 2 6 6 6
17 -
14 21 -
17 25 29 41 41
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
165 165 165 184 184 184 184 184 184 203
127 127 127 146 146 146 146 146 146 165
4 4 4 8 8 8 8 8 8 8
16 16 16 16 16 19 19 19 19 22
17 17 17 17 17 22 22 22 22 25
114 114 114 114 102 114
2 2 2 2 2 2
17 17 19 19 25 -
11 11 11 13 14 25 29 -
14 14 16 19 25 29 29 32 41
Flange Table Nominal Size 80mm (3 in) Thickness of flange Number of Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts bolts holes raised face raised face forged iron alloy steel 4 M16 18 128 3 18 8 M16 18 138 3 22 8 M16 18 138 3 22 13 20 8 M16 18 138 3 26 14 24 8 M16 18 138 3 16 24 8 M20 22 138 3 28 8 M24 26 138 3 36 8 M24 26 138 3 36 8 M27 30 138 3 46
Diameter of flange
Bolt circle number
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
190 200 200 200 200 215 230 230 255
150 160 160 160 160 170 180 180 200
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
191 210 210 241 267
152 168 168 190 203
4 8 8 8 8
16 19 19 22 29
19 22 22 25 32
127 127 127 127 127
2 2 6 6 6
19 -
16 23 -
19 29 32 38 48
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
184 184 184 203 203 203 203 203 203 235
146 146 146 165 165 165 165 165 165 191
4 4 4 8 8 8 8 8 8 8
16 16 16 16 16 19 19 19 22 25
17 17 17 17 17 22 22 22 25 29
127 127 127 127 114 127
2 2 2 2 2 2
17 19 19 19 29 -
13 13 13 14 16 32 32 -
14 14 16 22 32 32 32 35 48
BS 4504
Flange Table Nominal Size 100mm (4 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 148 3 18 M16 18 158 3 24 M16 18 158 3 24 16 20 M20 22 162 3 28 17 24 M20 22 162 3 19 24 M24 26 162 3 30 M27 30 162 3 40 M27 30 162 3 40 M30 33 162 3 54
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
210 220 220 235 235 250 265 265 300
170 180 180 190 190 200 210 210 235
4 8 8 8 8 8 8 8 8
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
229 254 273 292 311
191 200 216 235 241
8 8 8 8 8
16 19 22 29 32
19 22 25 32 35
157 157 157 157 157
2 2 6 6 6
24 -
17 27 -
24 32 38 44 54
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
216 216 216 229 229 229 241 241 248 286
178 178 178 191 191 191 197 197 203 235
4 4 8 8 8 8 8 8 8 8
16 16 16 16 16 19 22 22 25 29
17 17 17 17 17 22 25 25 29 32
152 152 152 152 159 159
2 2 2 2 2 2
19 19 22 22 32 -
16 16 16 17 19 35 35 -
17 17 19 25 35 35 35 41 57
BS 4504
BS 4504
Flange Table Nominal Size 125mm (5 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 178 3 20 M16 18 188 3 26 M16 18 188 3 26 22 M24 26 188 3 30 26 M24 26 188 3 26 M27 30 188 3 34 M30 33 188 3 40 M30 33 188 3 44 M30 33 188 3 60
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
240 250 250 270 270 295 315 315 340
200 210 210 220 220 240 250 250 275
8 8 8 8 8 8 8 8 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
254 279 330 349 375
216 235 267 279 292
8 8 8 8 8
19 19 25 32 38
22 22 29 35 41
186 186 186 186 186
2 2 6 6 6
24 -
19 29 -
24 35 44 51 73
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
254 254 254 279 279 279 279 279 286 324
210 210 210 235 236 235 235 235 235 273
4 8 8 8 8 8 12 12 12 12
16 16 16 19 19 22 22 22 22 29
17 17 17 22 22 25 25 25 25 32
178 178 178 178 19 210
2 2 2 2 2 2
19 21 22 25 35 -
17 17 17 19 22 38 41 -
17 17 22 29 38 41 41 44 67
BS 4504
Flange Table Nominal Size 150mm (6 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 202 3 20 M20 22 212 3 26 M20 22 212 3 26 22 M24 26 218 3 34 28 M24 26 218 3 28 M30 33 218 3 36 M30 33 218 3 44 M30 33 218 3 50 M33 36 218 3 68
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
265 285 285 300 300 345 355 355 390
225 240 240 250 250 280 290 290 320
8 8 8 8 8 8 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
279 318 356 381 394
241 270 292 318 318
8 12 12 12 12
19 19 25 29 35
22 22 29 32 38
216 216 216 216 216
2 2 6 6 6
25 -
21 30 -
25 37 48 56 83
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
279 279 279 305 306 305 305 305 324 375
235 235 235 260 260 260 260 260 273 318
4 8 8 12 12 12 12 12 12 12
16 16 19 19 19 22 22 22 25 32
17 17 22 22 22 25 25 25 29 35
210 210 210 210 210 229
2 2 2 2 2 2
21 21 22 25 35 -
17 17 17 22 25 38 41 -
17 17 22 29 38 41 44 51 73
BS 4504
Flange Table Nominal Size 200mm (8 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 258 3 22 M20 22 268 3 26 M20 22 268 3 30 24 M24 26 278 3 34 30 M27 30 285 3 34 M33 36 285 3 42 M33 36 285 3 52 M33 36 285 3 60 M39 42 285 3 82
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
320 340 340 360 375 415 430 430 485
280 295 295 310 320 345 360 360 400
8 8 12 12 12 12 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
343 381 419 470 483
298 330 349 394 394
8 12 12 12 12
19 22 29 35 41
22 25 32 38 44
270 270 270 270 270
2 2 6 6 6
29 -
24 35 -
29 41 56 64 92
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
337 337 337 368 368 368 368 368 413 476
292 292 292 324 324 324 318 324 356 406
8 8 8 12 12 12 12 12 12 12
16 16 19 19 19 22 25 25 32 38
17 17 22 22 22 25 29 29 35 41
260 260 260 260 273 298
2 2 2 2 2 2
22 22 25 29 38 -
19 19 19 25 32 41 48 -
19 19 25 32 41 48 51 64 89
BS 4504
Flange Table Nominal Size 250mm (10 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M16 18 312 3 24 M20 22 320 3 28 M24 26 320 3 32 26 M27 30 335 3 36 32 M30 33 345 3 38 M33 36 345 3 24 M36 39 345 3 60 M39 42 345 3 68 M45 48 345 3 100
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
375 395 404 426 450 470 505 515 585
335 350 355 370 385 400 430 430 490
12 12 12 12 12 12 12 12 12
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
406 445 508 546 584
362 387 432 470 483
12 16 16 16 12
22 25 32 35 41
25 29 35 38 51
324 324 324 324 324
2 2 6 6 6
30 -
25 -
30 41 64 70 108
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
406 406 406 432 432 432 432 432 483 559
358 356 356 381 381 381 381 387 425 489
8 8 12 12 12 12 16 16 16 16
19 19 19 22 22 25 25 25 32 38
22 22 22 25 25 29 29 29 35 41
311 311 311 311 330 356
2 2 2 2 2 2
24 25 25 29 41 -
19 19 22 25 35 -
19 22 25 35 48 51 57 73 108
BS 4504
Flange Table Nominal Size 300mm (12 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 365 4 24 M20 22 370 4 28 M24 26 378 4 32 28 M27 30 395 4 40 34 M30 33 410 4 42 M33 36 410 4 52 M39 42 410 4 68 M39 42 410 4 78 M48 52 410 4 120
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
440 445 460 485 515 530 585 585 690
395 400 410 430 450 460 500 500 590
12 12 12 16 16 16 16 16 16
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
483 521 559 610 673
432 451 489 533 572
12 16 20 20 16
22 29 32 35 51
25 32 35 38 54
381 381 381 381 381
2 2 6 6 6
32 -
27 -
32 51 67 80 124
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
457 457 457 489 489 489 489 508 578 654
406 406 406 438 438 438 432 457 508 572
8 12 12 16 16 16 16 16 16 16
19 19 22 22 22 25 29 29 38 44
22 22 25 25 25 29 32 32 41 48
362 362 362 362 381 413
2 2 2 2 2 2
24 25 29 32 44 -
22 22 25 29 38
22 25 29 38 51 22 64 83 121
BS 4504
57 -
Flange Table Nominal Size 350mm (14 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 415 4 26 M20 22 430 4 30 M24 26 438 4 36 30 M30 33 450 4 44 38 M33 36 465 4 46 M36 39 465 4 56 M45 48 465 4 74 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
490 505 520 555 580 600 655 -
445 460 470 490 510 525 560 -
12 16 16 16 16 16 16 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
533 584 603 641 749
476 514 527 559 635
12 20 20 20 16
25 29 35 38 57
29 32 38 41 60
413 413 413 413 413
2 2 6 6 6
35 -
-
35 54 70 86 133
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
527 527 527 552 552 552 572 584 648 -
470 470 470 495 495 495 508 527 578 -
8 12 12 16 16 16 16 16 20 -
22 22 22 25 25 29 32 32 38 -
25 25 25 29 29 32 35 35 41 -
419 419 419 419 438 -
2 2 2 2 2 -
25 29 32 36 48 -
25 25 25 32 41 -
25 25 32 41 54 60 70 95 -
BS 4504
Flange Table Nominal Size 400mm (16 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M20 22 465 4 28 M24 26 482 4 32 M27 30 490 4 38 32 M33 36 505 4 48 40 M36 39 535 4 50 M39 42 535 4 60 M45 48 535 4 78 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
540 565 580 620 660 670 715 -
495 515 525 550 585 585 620 -
16 16 16 16 16 16 16 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
597 648 686 705 826
540 572 603 616 705
16 20 20 20 16
25 32 38 41 64
29 35 41 44 67
470 470 470 470 470
2 2 6 6 6
37 -
-
37 57 76 89 146
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
578 578 578 610 610 610 629 641 743 -
521 521 521 552 552 552 565 584 660 -
12 12 12 20 20 20 20 20 20 -
22 22 22 25 25 29 32 32 44 -
25 25 25 29 29 32 35 35 48 -
483 483 483 483 495 -
2 2 2 2 2 -
27 29 32 35 51 -
25 25 25 32 44 -
25 25 32 44 57 67 76 108 -
BS 4504
Flange Table Nominal Size 450mm (18 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper raised face raised face bolts holes forged iron alloy steel M20 22 520 4 30 M24 26 532 4 32 M27 30 550 4 40 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
595 616 640 -
550 565 585 -
16 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
635 711 743 787 914
578 629 654 686 775
16 24 20 20 16
29 32 41 48 70
32 35 44 51 73
533 533 533 533 533
2 2 6 6 6
40 -
-
40 60 83 102 162
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
641 641 641 673 673 673 718 737 -
584 584 584 610 610 610 664 673 -
12 12 16 20 20 20 20 20 -
22 22 22 29 29 32 35 35 -
25 25 25 32 32 35 38 38 -
533 533 572 572 -
2 2 2 2 -
27 32 35 38 54 -
27 29 29 35 48 -
29 29 35 48 60 76 83 -
BS 4054
Flange Table Nominal Size 500mm (20 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper raised face raised face bolts holes forged iron alloy steel M20 22 570 4 30 M24 26 585 4 34 M30 33 610 4 42 36 M33 36 615 4 62 44 M39 42 615 4 52 M45 48 615 4 68 M52 56 615 4 94 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
645 670 715 730 755 800 870 -
600 620 650 660 670 705 760 -
20 20 20 20 20 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
699 775 813 857 984
635 686 724 749 832
20 24 24 20 16
29 32 41 51 76
32 35 44 54 79
584 584 584 584 584
2 2 6 6 6
43 -
-
43 64 89 108 178
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
705 705 705 737 737 737 787 806 -
641 641 641 673 673 673 711 730 -
12 16 16 24 24 24 20 20 -
22 22 22 29 29 32 38 38 -
25 25 25 32 32 35 41 41 -
597 597 622 622 -
2 2 2 2 -
29 32 38 41 57 -
29 32 32 38 51 -
32 32 38 51 64 83 89 -
BS 4504
Flange Table Nominal Size 600mm (24 in) Thickness of flange Diameter of Diameter of Diameter of Height of Cast and Grey cast Copper bolts holes raised face raised face forged iron alloy steel M24 26 670 5 30 M27 30 685 5 36 M33 36 725 5 48 40 M36 39 720 5 46 M45 48 735 5 60 M52 56 735 4 76 M56 62 735 4 104 -
Diameter of flange
Bolt circle number
Number of bolts
PN 6 PN 10 PN 16 PN 25 PN 40 PN 64 PN 100 PN 160 PN 250
755 780 840 845 890 930 990 -
705 725 770 770 795 820 875 -
20 20 20 20 20 20 20 -
ANSI
Class 125/150 Class 300 Class 600 Class 900 Class 1 500
813 914 940 1041 1168
749 813 838 902 991
20 24 24 20 16
32 38 48 64 89
35 41 51 67 92
692 692 692 692 692
2 2 6 6 6
48 -
-
48 70 102 140 203
BS 10
Table A Table D Table E Table F Table H Table J Table K Table R Table S Table T
826 826 826 851 851 851 -
756 756 756 781 781 781 -
12 16 16 24 24 24 -
25 25 29 32 32 35 -
29 29 32 35 35 38 -
699 699 -
2 2 -
30 35 41 44 64 -
30 35 38 41 57 -
35 38 41 57 70 -
BS 4504
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