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Flanges Dimension BS-4504

DN = Nominal size, D = Outside Diameter, A = Outside Dia of Neck , B1 = Bore of Type 101 & 112 Flange, C1 = Thickness of Plate Flange,
C2 = Thickness of Weld_Neck and Boss Flange, N1 = Dia of Weld Neck, N2 = Dia of Boss,R = corner Radius, H1 = Length of Boss Flange,
H2 = Length of Weld Neck Flange, H3 = Length of Neck :

Note: The flanges shown are only a small part of the range covered in BS 4504.

The Facings shown are type B (Raised Face).  Other Facings include:
Type A..Flat:  Type C..Tongue:   Type D..Groove   Type E..Spigot:  :Type F..Recess:   Type G..O-ring Recess:  Type H.,0-ring Groove:
NOTE all dimensions are in mm
D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1
10 90 14 14 20 35 6 3 17,2 28 30 18 40 2
15 95 14 14 20 35 6 3 21,3 32 35 22 45 2
20 105 14 14 24 38 6 4 26,9 39 45 27,5 58 2
25 115 16 16 24 38 6 4 33,7 46 52 34,5 68 2
32 140 18 16 26 40 6 5 42,4 56 60 43,5 78 2
40 150 18 16 26 42 7 5 48,3 64 70 49,5 88 3
50 165 20 18 28 45 8 5 60,3 74 84 61,5 102 3
65 185 20 18 32 45 10 6 76,1 92 104 77,5 122 3
80 200 20 20 34 50 10 6 88,9 110 118 90,5 138 3
100 220 22 20 40 52 12 6 114,3 130 140 116 162 3
125 250 22 22 44 55 12 6 139,7 158 168 141,5 188 3
150 285 24 22 44 55 12 8 168,3 184 195 170,5 212 3
200 340 26 24 44 62 16 8 219,1 234 246 221,5 268 3
250 405 29 26 46 70 16 10 273 288 298 276,5 320 3
300 460 32 28 46 78 16 10 323,9 342 350 327,5 378 4
350 520 35 30 57 82 16 10 355,6 390 400 359 438 4
400 580 38 32 63 85 16 10 406,4 444 456 411,0 490 4
450 640 42 34 68 87 16 12 457,0 490 502 462,0 550 4
500 715 46 34 73 90 16 12 508,0 546 559 513,5 610 4
600 840 52 36 83 95 18 12 610,0 650 658 616,5 725 5
700 910 60 36 83 100 18 12 711,0 750 760 - 795 5
800 1025 68 38 90 105 20 12 813,0 848 864 - 900 5
900 1125 76 40 94 110 20 12 914,0 948 968 - 1000 5
1000 1255 84 42 100 120 22 12 1016,0 1056 1072 - 1115 5
1200 1485 98 48 - 130 30 12 1220,0 1260 - - 1330 5
1400 1685 - 52 - 145 30 12 1420,0 1465 - - 1530 5
1600 1930 - 58 - 160 35 12 1620,0 1668 - - 1750 5
D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1
 
FLANGE BOLTING
K = Bolt Circle Diameter, L = Dia Of Bolt Hole,
No = Number of Holes, Size = Size of Bolts
DN K L No Size
mm mm mm - mm
10 60 14 4 M12
15 65 14 4 M12
20 75 14 4 M12
25 85 14 4 M12
32 100 18 4 M16
40 110 18 4 M16
50 125 18 4 M16
65 145 18 8 M16
80 160 18 8 M16
100 180 18 8 M16
125 210 18 8 M16
150 240 22 8 M20
200 295 22 12 M20
250 355 26 12 M24
300 410 26 12 M24
350 470 26 16 M24
400 525 30 16 M27
450 585 30 20 M27
500 650 33 20 M30
600 770 36 20 M33
700 840 36 24 M33
800 950 39 24 M36
900 1050 39 28 M36
1000 1170 42 28 M39
1200 1390 48 32 M45
1400 1590 48 36 M45
1600 1820 56 40 M52
K L No Size
BS EN 1092-1 PN 25 Dimensions Stainless Steel Flanges, Carbon Steel Forged Flanges 15 NB To 750 NB, 150, 300, 600, 900 & 1500 LBS, Flanges A-105 ANSI B16.5 Flanges, SORF Flanges, WNRF Flanges, BLRF Flanges, SWRF Flanges, LAP Joint Flanges, Threaded Flanges, Reducing Flanges, Spectacle Flanges, Plate Flanges, Nickel Alloy Flanges Non Ferrous Metal Flanges Alloy Steel Flanges
DN = Nominal size, D = Outside Diameter, A = Outside Dia of Neck , B1 = Bore of Type 01 & 12 Flange, C1 = Thickness of Plate Flange,
C2 = Thickness of Weld_Neck and Boss Flange, N1 = Dia of Weld Neck, N2 = Dia of Boss,R = corner Radius, H1 = Length of Boss Flange,
H2 = Length of Weld Neck Flange, H3 = Length of Neck : S = neck thickness

Note: The flange types shown are only a small part of the range covered in BS EN 1092-1.
  • type 05 is a blank flange
  • type13 is a screwed boss flange
  • type 02 is a loose plate flange used with either
      a type 32 weld on plate collar or
      a type 33 lapped pipe end
  • a type 04 flange is a loose flange for use with a
       type 34 a weld-neck collar
  • type 21 is an integral flange
The Facings shown are type B (Raised Face).  Other Facings include:
Type A..Flat:  Type C..Tongue:   Type D..Groove   Type E..Spigot:  :Type F..Recess:   Type G..O-ring Spigot:  Type H.,0-ring Groove:

A typical designation for a flange would be BS EN 1092-1/01B/DN150/PN25/ */S235JR
Key: = Standard No/Flange Type & Face Type / Nominal Size/ Pressure Rating/*/ Material Designation.
* Normally not used.   For 01 type flanges above 600 mm the bore B1 would be specified here .   * for type 11 and 31 the neck thickness (S) is specified here.
An example designation for an flange for an 800mm pipe ...  BS EN 1092-1/01B/DN800/PN25/818/S235JR

This is an extremely simplified note.   To obtain a comprehensive description with the various variations the standards must be used.
Note : All Dimensions in mm
DN D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1 S
10 90 14 14 20 35 6 4 17,2 28 30 18 40 2 1,8
15 95 14 14 20 35 6 4 21,3 32 35 22 45 2 2,0
20 105 14 14 24 38 6 4 26,9 39 45 27,5 58 2 2,3
25 115 16 16 24 38 6 4 33,7 46 52 34,5 68 2 2,6
32 140 18 16 26 40 6 6 42,4 56 60 43,5 78 2 2,6
40 150 18 16 26 42 7 6 48,3 64 70 49,5 88 2 2,6
50 165 20 20 34 48 8 6 60,3 75 84 61,5 102 2 2,9
65 185 22 22 38 52 10 6 76,1 90 104 77,5 122 2 2,9
80 200 24 24 40 58 12 8 88,9 105 118 90,5 138 2 3,2
100 235 26 24 44 65 12 8 114,3 134 145 116 162 2 3,6
125 270 28 26 48 68 12 10 139,7 162 170 141,5 188 2 4,2
150 300 30 28 52 75 12 10 168,3 192 200 170,5 218 2 4,5
200 360 32 30 52 80 16 10 219,1 244 256 221,5 278 2 6,3
250 425 35 32 60 88 18 12 273,0 298 310 276,5 335 2 7,1
300 485 38 34 67 92 18 12 323,9 352 364 327,5 395 2 8,0
350 555 42 38 72 100 20 12 355,6 398 418 359,5 450 2 8,0
400 620 46 40 78 110 20 12 406,4 452 472 411,0 505 2 8,8
450 670 50 46 84 110 20 12 457,0 500 520 462,0 555 2 8,8
500 730 56 48 90 125 20 12 508,0 558 580 513,5 615 2 10,0
600 845 68 58 100 125 20 12 610,0 660 684 616,5 720 2 11,0
700 960 - 46 - 125 20 12 711,0 760 - - 820 2 12,5
800 1085 - 50 - 135 22 12 813,0 864 - - 930 2 14,2
900 1185 - 54 - 145 24 12 914,0 968 - - 1030 2 16,0
1000 1320 - 58 - 155 24 16 1016,0 1070 - - 1140 2 17,5
1200 1530 - - - - - 18 1219,0 - - - 1350 2 -
1400 1755 - - - - - 18 1422,0 - - - 1560 2 -
1600 1975 - - - - - 20 1626,0 - - - 1780 2 -
DN D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1 S
Note: in BS EN 1092-1:2002   f1= 2 for all sizes.
In the latest versions of the relevant DIN standard. f1 varies as follow
(DN =< 32 f1 = 1-2, DN 32->250(inc) f1= 1-3, DN 250->500(inc) f1= 1-4, Dn >500 f1= 1-5 ).. Flange Bolting
K = Bolt Circle Diameter, L = Dia Of Bolt Hole,
No = Number of Holes, Size = Size of Bolts
DN K L No Size
mm mm mm - mm
10 60 14 4 M12
15 65 14 4 M12
20 75 14 4 M12
25 85 14 4 M12
32 100 18 4 M16
40 110 18 4 M16
50 125 18 4 M16
65 145 18 8 M16
80 160 18 8 M16
100 190 22 8 M20
125 220 26 8 M24
150 250 26 8 M24
200 310 26 12 M24
250 370 30 12 M27
300 430 30 16 M27
350 490 33 16 M30
400 550 36 16 M33
450 600 36 20 M33
500 660 36 20 M33
600 770 39 20 M36
700 875 42 24 M39
800 990 48 24 M45
900 1090 48 28 M45
1000 1210 56 28 M52
1200 1420 56 32 M52
1400 1640 62 36 M56
1600 1860 62 40 M56
DN K L No Size
BS4504 PN 40 Dimensions Note: Now obsolete and replaced by BS EN 1092-1 see flange index page
Stainless Steel Flanges, Carbon Steel Forged Flanges 15 NB To 750 NB, 150, 300, 600, 900 & 1500 LBS, Flanges A-105 ANSI B16.5 Flanges, SORF Flanges, WNRF Flanges, BLRF Flanges, SWRF Flanges, LAP Joint Flanges, Threaded Flanges, Reducing Flanges, Spectacle Flanges, Plate Flanges, Nickel Alloy Flanges Non Ferrous Metal Flanges Alloy Steel Flanges
DN = Nominal size, D = Outside Diameter, A = Outside Dia of Neck , B1 = Bore of Type 101 & 112 Flange, C1 = Thickness of Plate Flange,
C2 = Thickness of Weld_Neck and Boss Flange, N1 = Dia of Weld Neck, N2 = Dia of Boss, R = corner Radius, H1 = Length of Boss Flange,
H2 = Length of Weld Neck Flange, H3 = Length of Neck :

Note: The flanges shown are only a small part of the range covered in BS 4504.

The Facings shown are type B (Raised Face).  Other Facings include:
Type A..Flat:  Type C..Tongue:   Type D..Groove   Type E..Spigot:  :Type F..Recess:   Type G..O-ring Recess:  Type H.,0-ring Groove:
Note : All Dimensions in mm
D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1
10 90 14 16 22 35 6 3 17,2 28 30 18 40 2
15 95 14 16 22 38 6 3 21,3 32 35 22 45 2
20 105 16 18 26 40 6 4 26,9 40 45 27,5 58 2
25 115 16 18 28 40 6 4 33,7 46 52 34,5 68 2
32 140 18 18 30 42 6 5 42,4 56 60 43,5 78 2
40 150 18 18 32 45 7 5 48,3 64 70 49,5 88 3
50 165 20 20 34 48 8 5 60,3 74 84 61,5 102 3
65 185 22 22 38 52 10 6 76,1 92 104 77,5 122 3
80 200 24 24 40 58 12 6 88,9 110 118 90,5 138 3
100 235 26 24 44 65 12 6 114,3 134 145 116 162 3
125 270 28 26 48 68 12 6 139,7 162 170 141,5 188 3
150 300 30 28 52 75 12 8 168,3 190 200 170,5 218 3
200 375 36 34 52 88 16 8 219,1 244 260 221,5 285 3
250 450 42 38 60 105 18 10 273 306 312 276,5 345 3
300 515 48 42 67 115 18 10 323,9 362 380 327,5 410 4
350 580 54 46 72 125 20 10 355,6 408 424 359,5 465 4
400 660 60 50 78 135 20 10 406,4 462 478 411,0 535 4
450 685 66 50 84 135 20 12 457,0 500 522 462,0 560 4
500 755 72 52 90 140 20 12 508,0 562 576 513,5 615 4
600 890 84 60 100 150 20 12 610,0 666 686 616,5 735 5
D C1 C2 H1 H2 H3 R A N1 N2 B1 d1 f1
Flange Bolting
K = Bolt Circle Diameter, L = Dia Of Bolt Hole,
No = Number of Holes, Size = Size of Bolts
K L No Size
mm mm mm - mm
10 60 14 4 M12
15 65 14 4 M12
20 75 14 4 M12
25 85 14 4 M12
32 100 18 4 M16
40 110 18 4 M16
50 125 18 4 M16
65 145 18 8 M16
80 160 18 8 M16
100 190 22 8 M20
125 220 26 8 M24
150 250 26 8 M24
200 320 30 12 M27
250 385 33 12 M30
300 450 33 16 M30
350 510 36 16 M33
400 585 39 16 M36
450 610 39 20 M36
500 670 42 20 M39
600 795 48 20 M45
 
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