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BS4504 Plate Flange

BS 4504 Weld Neck Flange Dimensions and Technical Drawing

BS 4504 Weld Neck Flange

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BS 4504 Weld Neck Flange Dimensions
Dimensions in MM

DN PN A mm B mm C mm D mm E mm F mm G mm H mm
10 2.5,6 75 17.2 12 28 6 26 3 1.8
10 90 14 35 　 28 1.8
16 90 14 35 　 28 1.8
25 90 16 35 　 28 1.8
40 90 16 35 　 28 1.8
15 2.5,6 80 21.3 12 30 6 30 3 2
10 95 14 35 32 2
16 95 14 35 32 2
25 95 16 38 32 2
40 95 16 38 32 2
20 2.5,6 90 26.9 14 32 6 38 4 2.3
10 105 16 38 39 2.3
16 105 16 38 39 2.3
25 105 18 40 40 2.3
40 105 18 40 40 2.3
25 2.5,6 100 33.7 14 35 6 42 4 2.6
10 115 16 38 46 2.6
16 115 16 38 46 2.6
25 115 18 40 46 2.6
40 115 18 40 46 2.6
32 2.5,6 120 42.4 14 35 6 55 5 2.6
10 140 16 40 56 2.6
16 140 16 40 56 2.6
25 140 18 42 56 2.6
40 140 18 42 56 2.6
40 2.5,6 130 48.3 14 38 7 62 5 2.6
10 150 16 42 64 2.6
16 150 16 42 64 2.6
25 150 18 45 64 2.6
40 150 18 45 64 2.6
50 2.5,6 140 60.3 14 38 8 74 5 2.9
10 165 18 45 74 2.9
16 165 18 45 74 2.9
25 165 20 48 74 2.9
40 165 20 48 74 2.9
65 2.5,6 160 76.1 14 38 9 88 6 2.9
10 185 18 45 10 92 2.9
16 185 18 45 92 2.9
25 185 22 52 92 2.9
40 185 22 52 92 2.9
80 2.5,6 190 88.9 16 42 10 102 6 3.2
10 200 20 50 110 3.2
16 200 20 50 12 110 3.2
25 200 24 58 110 3.2
40 200 24 58 110 3.2
100 2.5,6 210 114.3 16 45 10 130 6 3.6
10 220 20 52 12 130 3.6
16 220 20 52 130 3.6
25 235 24 65 134 3.6
40 235 24 65 134 3.6
125 2.5,6 240 139.7 18 48 10 155 6 4
10 250 22 55 12 158 4
16 250 22 55 158 4
25 270 26 68 162 4
40 270 26 68 162 4
150 2.5,6 265 168.3 18 48 12 184 8 4.5
10 285 22 55 184 4.5
16 285 22 55 184 4.5
25 300 28 75 190 4.5
40 300 28 75 190 4.5
200 2.5,6 320 219.1 20 55 15 236 8 5.6
10 340 24 62 16 234 5.6
16 340 24 62 234 5.6
25 360 30 80 244 6.3
40 375 34 88 244 6.3
250 2.5,6 375 273 22 60 15 290 10 6.3
10 395 26 68 16 288 6.3
16 405 26 70 288 6.3
25 425 32 88 18 296 7.1
40 450 38 105 306 7.1
300 2.5,6 440 323.9 22 62 15 342 10 7.1
10 445 26 68 16 342 7.1
16 460 28 78 342 7.1
25 485 34 92 18 350 8
40 515 42 115 362 8
350 2.5,6 490 355.6 22 62 15 385 10 7.1
10 505 26 68 16 390 7.1
16 520 30 82 390 8
25 555 38 100 20 398 8
40 580 46 125 408 8.8
400 2.5,6 540 406.4 22 65 15 438 10 7.1
10 565 26 72 16 440 7.1
16 580 32 85 444 8
25 620 40 110 20 452 8.8
40 660 50 135 462 11
450 2.5,6 595 457 24 65 15 492 12 7.1
　 10 615 28 72 16 488 7.1
　 16 640 34 87 490 8
　 25 670 42 110 20 500 8.8
　 40 685 50 135 500 12.5
500 2.5,6 645 508 24 68 15 538 12 7.1
10 670 28 75 16 540 7.1
16 715 34 90 546 8
25 730 44 125 20 558 10
40 755 52 140 562 14.2
600 2.5,6 755 610 24 70 16 640 12 7.1
10 780 28 80 18 640 7.1
16 840 36 95 650 8.8
25 845 46 125 20 660 11
40 890 60 150 666 16
700 2.5 860 711 24 70 16 740 12 -1
6 860 24 70 740 7.1
10 895 30 80 18 746 8
16 910 36 100 750 8.8
25 960 46 125 20 760 12.5
800 2.5 975 813 26 70 16 842 12 -1
6 975 24 70 842 7.1
10 1015 32 90 18 848 8
16 1025 38 105 20 848 10
25 1085 50 135 22 864 14.2
900 2.5 1075 914 26 70 16 942 12 -1
6 1075 26 70 942 7.1
10 1115 34 95 20 948 10
16 1125 40 110 948 10
25 1185 54 145 24 968 16
1000 2.5 1175 1016 26 70 16 1045 12 -1
6 1175 26 70 1045 7.1
10 1230 34 95 20 1050 10
16 1255 42 120 22 1056 10
25 1320 58 155 24 1070 17.5
1200 2.5 1375 1220 26 70 16 1245 16 -1
6 1405 28 90 20 1248 12 8
10 1455 38 115 25 1256 11
16 1485 48 130 30 1260 12.5
1400 2.5 1575 1420 26 70 16 1445 16 -1
6 1630 32 90 20 1452 12 8
10 1675 42 120 25 1460 12
16 1685 52 145 30 1465 14.2
1600 2.5 1790 1620 26 80 20 1645 16 -1
6 1830 34 90 1655 12 9
10 1915 46 130 25 1666 14
16 1930 58 160 35 1668 16
1800 2.5 1990 1820 26 80 20 1845 16 -1
6 2045 36 100 1855 15 10
10 2115 50 140 30 1866 15
16 2130 62 170 35 1870 17.5
2000 2.5 2190 2020 26 80 22 2045 16 -1
6 2265 38 110 25 2058 15 11
10 2325 54 150 30 2070 16
16 2345 66 190 40 2072 20

BS 4504 Weld Neck Flange Industries and Applications
Widely used in the industries

  • Pumps, Valves, and vessels in manufacturing and food processing.
  • Pipe connections in industrial waterworks.
  • Heat exchangers and heating systems of all sizes.
  • Mining support.
  • Nuclear power systems.
  • Plumbing and mechanical systems.
  • Assemblies in the oil, gas, and petrochemical industries.
  • Fire protection systems.

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