BS 4504 Standard Flange Drilling Details
PDF: BS4504 flange drilling dimensions details
BS 4504 Standard Flange Drilling Details.
BS 4504 Standard Flange Drilling Dimensins and Details.
DN | PN | A | B | C | Bolt Holes | |
mm | mm | mm | No. | Bolt size | ||
10 | 2.5 & 6 | 75 | 50 | 11 | 4 | M10 |
10,16, | 90 | 60 | 14 | 4 | M12 | |
15 | 2.5 & 6 | 80 | 55 | 11 | 4 | M10 |
10 & 16 | 95 | 65 | 14 | 4 | M12 | |
25 & 40 | 95 | 65 | 14 | 4 | M12 | |
20 | 2.5 & 6 | 90 | 65 | 11 | 4 | M10 |
10 & 16 | 105 | 75 | 14 | 4 | M12 | |
25 &40 | 105 | 75 | 14 | 4 | M12 | |
25 | 2.5 & 6 | 100 | 75 | 11 | 4 | M10 |
10 & 16 | 115 | 85 | 14 | 4 | M12 | |
25&40 | 115 | 85 | 14 | 4 | M12 | |
32 | 2.5 & 6 | 120 | 90 | 14 | 4 | M12 |
10 & 16 | 140 | 100 | 18 | 4 | M16 | |
25 & 40 | 140 | 100 | 18 | 4 | M16 | |
40 | 2.5 & 6 | 130 | 100 | 14 | 4 | M12 |
10 & 16 | 150 | 110 | 18 | 4 | M16 | |
25 &40 | 150 | 110 | 18 | 4 | M16 | |
50 | 2.5 & 6 | 140 | 110 | 14 | 4 | M12 |
10 & 16 | 165 | 125 | 18 | 4 | M16 | |
25 &40 | 165 | 125 | 18 | 4 | M16 | |
65 | 2.5 & 6 | 160 | 130 | 14 | 4 | M12 |
10 & 16 | 185 | 145 | 18 | 4/8 | M16 | |
25 & 40 | 185 | 145 | 18 | 8 | M16 | |
80 | 2.5 & 6 | 190 | 150 | 18 | 4 | M16 |
10 & 16 | 200 | 160 | 18 | 8 | M16 | |
25 &40 | 200 | 160 | 18 | 8 | M16 | |
100 | 2.5 & 6 | 210 | 170 | 18 | 4 | M16 |
10 & 16 | 220 | 180 | 18 | 8 | M16 | |
25 &40 | 235 | 190 | 22 | 8 | M20 | |
125 | 2.5 & 6 | 240 | 200 | 18 | 8 | M16 |
10 & 16 | 250 | 210 | 18 | 8 | M16 | |
25 & 40 | 270 | 220 | 26 | 8 | M24 | |
150 | 2.5 & 6 | 265 | 225 | 18 | 8 | M16 |
10 & 16 | 285 | 240 | 22 | 8 | M20 | |
25 & 40 | 300 | 250 | 26 | 8 | M24 | |
200 | 2.5 & 6 | 320 | 280 | 18 | 8 | M16 |
10 & 16 | 340 | 295 | 22 | 8/12 | M20 | |
25 | 360 | 310 | 26 | 12 | M24 | |
40 | 375 | 320 | 30 | 12 | M27 | |
250 | 2.5 & 6 | 375 | 335 | 18 | 12 | M16 |
10 | 395 | 350 | 22 | 12 | M20 | |
16 | 405 | 355 | 26 | 12 | M24 | |
25 | 425 | 370 | 30 | 12 | M27 | |
40 | 450 | 385 | 33 | 12 | M30 | |
300 | 2.5 & 6 | 440 | 395 | 22 | 12 | M20 |
10 | 445 | 400 | 22 | 12 | M20 | |
16 | 460 | 410 | 26 | 12 | M24 | |
25 | 485 | 430 | 30 | 16 | M27 | |
40 | 515 | 450 | 33 | 16 | M30 |
DN | PN | A | B | C | Bolt Holes | |
mm | mm | mm | No. | Bolt size | ||
350 | 2.5 & 6 | 490 | 445 | 22 | 12 | M20 |
10 | 505 | 460 | 22 | 16 | M20 | |
16 | 520 | 470 | 26 | 16 | M24 | |
25 | 555 | 490 | 33 | 16 | M30 | |
40 | 580 | 510 | 36 | 16 | M33 | |
400 | 2.5 & 6 | 540 | 495 | 22 | 16 | M20 |
10 | 565 | 515 | 26 | 16 | M24 | |
16 | 580 | 525 | 30 | 16 | M27 | |
25 | 620 | 550 | 36 | 16 | M33 | |
40 | 660 | 585 | 39 | 16 | M36 | |
450 | 2.5 & 6 | 595 | 550 | 22 | 16 | M20 |
10 | 615 | 565 | 26 | 20 | M24 | |
16 | 640 | 585 | 30 | 20 | M27 | |
25 | 670 | 600 | 36 | 20 | M33 | |
40 | 685 | 610 | 39 | 20 | M36 | |
500 | 2.5 & 6 | 645 | 610 | 22 | 20 | M20 |
10 | 670 | 620 | 26 | 20 | M24 | |
16 | 715 | 650 | 33 | 20 | M30 | |
25 | 730 | 660 | 36 | 20 | M33 | |
40 | 755 | 670 | 42 | 20 | M39 | |
600 | 2.5 & 6 | 755 | 705 | 26 | 20 | M24 |
10 | 780 | 725 | 30 | 20 | M27 | |
16 | 840 | 770 | 36 | 20 | M33 | |
25 | 845 | 770 | 39 | 20 | M36 | |
40 | 890 | 795 | 48 | 20 | M45 | |
700 | 2.5 & 6 | 860 | 810 | 26 | 24 | M24 |
10 | 895 | 840 | 30 | 24 | M27 | |
16 | 910 | 840 | 36 | 24 | M33 | |
25 | 960 | 875 | 42 | 24 | M39 | |
800 | 2.5 & 6 | 975 | 920 | 30 | 24 | M27 |
10 | 1015 | 950 | 33 | 24 | M30 | |
16 | 1025 | 950 | 39 | 24 | M36 | |
25 | 1085 | 990 | 48 | 24 | M45 | |
900 | 2.5 & 6 | 1075 | 1020 | 30 | 24 | M27 |
10 | 1115 | 1050 | 33 | 28 | M30 | |
16 | 1125 | 1050 | 39 | 28 | M36 | |
25 | 1185 | 1090 | 48 | 28 | M45 | |
1000 | 2.5 & 6 | 1175 | 1120 | 30 | 28 | M27 |
10 | 1230 | 1160 | 36 | 28 | M33 | |
16 | 1255 | 1170 | 42 | 28 | M39 | |
25 | 1320 | 1210 | 56 | 28 | M52 | |
1200 | 2.5 | 1375 | 1320 | 30 | 32 | M27 |
6 | 1405 | 1340 | 33 | 32 | M30 | |
10 | 1455 | 1380 | 39 | 32 | M36 | |
16 | 1485 | 1390 | 48 | 32 | M45 | |
25 | 1530 | 1420 | 56 | 32 | M52 | |
1400 | 2.5 | 1575 | 1520 | 30 | 36 | M27 |
6 | 1630 | 1560 | 36 | 36 | M33 | |
10 | 1675 | 1590 | 42 | 36 | M39 | |
16 | 1685 | 1590 | 48 | 36 | M45 | |
25 | 1755 | 1640 | 62 | 36 | M56 | |
1600 | 2.5 | 1790 | 1730 | 30 | 40 | M27 |
6 | 1830 | 1760 | 36 | 40 | M33 | |
10 | 1915 | 1820 | 48 | 40 | M45 | |
16 | 1930 | 1820 | 56 | 40 | M52 | |
25 | 1975 | 1860 | 62 | 40 | M56 | |
1800 | 2.5 | 1990 | 1930 | 30 | 44 | M27 |
6 | 2045 | 1970 | 39 | 44 | M36 | |
10 | 2115 | 2020 | 48 | 44 | M45 | |
16 | 2130 | 2020 | 56 | 44 | M52 | |
25 | 2185 | 2070 | 70 | 44 | M64 | |
2000 | 2.5 | 2190 | 2130 | 30 | 48 | M27 |
6 | 2265 | 2180 | 42 | 48 | M39 | |
10 | 2325 | 2230 | 48 | 48 | M45 | |
16 | 2345 | 2230 | 62 | 48 | M56 | |
25 | 2425 | 2300 | 70 | 48 | M64 |