Rubber hose – Flexible hose high pressure – Hose assemblies – Quick coupling – Flexibles for fluid transfer
Brides NF EN 1759 1

Stainless steel flanges ASME B16.5-2013

Class 150 / 300 / 600 / 900 / 1500 / 2500

The ASME B16.5 standard sets specifications on circular flanges made of Class 150 and Class 2500 steel and with nominal dimensions NPS ½ to 24.

It defines the types of flanges and their joint sizes, dimensions, tolerances, threads, bolt dimensions, conditions of joint faces of the flanges, marking, materials and relationships between pressure and temperature.

Type 01

Type 01 - Flat-face flange to be welded

Type-01-Bride-plate-a-souder

Type 05

Type 05 - Blind flange

Type-05-Bride-pleine

Type 11

Type 11 - Flange with butt-weld neck

Type-11-Bride-a-collerette-a-souder-bout-a-bout

Type 12

Type 12 - Slip-on and weld neck flange

Type-12-Bride-a-emmancher-et-a-souder-a-collerette

Type 13

Type 13 - Threaded flange with neck

Type-13-Bride-filetee-a-collerette

Type 14

Type 14 - Socket weld and weld neck flange

Type-14-Bride-a-emboiter-et-a-souder-a-collerette

Type 15

Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck

Type-15-Bride-tournante-a-collerette

Type 21

Type 21 - Integral flange


Type-21-Bride-incorporee


Class 150

Class 150 Flange - DN 15 to 600 - ASME B16.5

+ - Class 150 Flange - Type 01 - Flat-face flange to be welded
passage-des-boulons-brides-class-150 type01-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of bore
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C1 B1
mm mm Pouce (mm)   Pouce mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 12,0 22,4
3/4 20 98 69,8 5/8 (15,9) 4 1/2 14,0 27,7
1 25 108 79,4 5/8 (15,9) 4 1/2 16,0 34,5
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 18,0 43,2
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 19,0 49,5
2 50 152 120,6 3/4 (19,0) 4 5/8 21,0 62,0
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 24,0 74,7
3 80 190 152,4 3/4 (19,0) 4 5/8 26,0 90,7
4 100 229 190,5 3/4 (19,0) 8 5/8 27,0 116,1
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 28,0 143,8
6 150 279 241,3 7/8 (22,2) 8 3/4 31,0 170,7
8 200 343 298,4 7/8 (22,2) 8 3/4 34,0 221.5
10 250 406 362,0 1 (25,4) 12 7/8 38,0 276,4
12 300 483 431,8 1 (25,4) 12 7/8 42,0 327,2
14 350 533 476,2 1 1/8 (28,6) 12 1 43,0 359,2
16 400 597 539,8 1 1/8 (28,6) 16 1 48,0 410,5
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 56,0 461,8
20 500 698 635,0 1 1/4(31,8) 20 1 1/8 59,0 513,1
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 62,0 616,0

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-150 type05-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange
Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C2 G
mm mm Pouce (mm)   Pouce mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 -
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 -
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 -
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 -
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 -
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 -
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 38
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 51
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 76
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 102
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 127
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 200
10 250 406 362,0 1 (25,4) 12 7/8 30,2 225
12 300 483 431,8 1 (25,4) 12 7/8 31,8 279
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 311
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 362
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 39,7 413
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 463
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 565

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-150 type11-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C2 N A H3 B3 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 21,3 47,6 15,8 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 38 26,7 52,4 20,8 3
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 49 33,4 55,6 26,7 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 59 42,2 57,2 35,1 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 65 48,3 61,9 40,9 3
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 78 60,3 63,5 52,6 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 90 73,0 69,9 62,7 3
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 108 88,9 69,9 78,0 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 114,3 76,2 102,4 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 141,3 88,9 128,3 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 168,3 88,9 154,2 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 219,1 101,6 202,7 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 273,0 101,6 254,5 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 323,9 114,3 304,8 9,5
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 400 355,6 127,0 To be specified
by the buyer		 9,5
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 457 406,4 127,0 9,5
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 39,7 505 457,2 139,7 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 508,0 144,5 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 609,6 152,4 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 12 - Slip-on and weld neck flange
passage-des-boulons-brides-class-150 type12-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C2 N H1 B1 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 15,9 22,4 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 38 15,9 27,7 3
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 49 17,5 34,5 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 59 20,6 43,2 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 65 22,2 49,5 3
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 78 25,4 62,0 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 90 28,6 74,7 3
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 108 30,2 90,7 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 33,3 116,1 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 36,5 143,8 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 39,7 170,7 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 44,5 221.5 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 49,2 276,4 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 55,6 327,2 9,5
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 400 57,2 359,2 9,5
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 457 63,5 410,5 9,5
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 39,7 505 68,3 461,8 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 73,0 513,1 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 82,6 616,0 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-150 type13-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Minimum
thread length		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C2 N H1 T R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 15,9 15,9 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 38 15,9 15,9 3
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 49 17,5 17,5 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 59 20,6 20,6 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 65 22,2 22,2 3
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 78 25,4 25,4 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 90 28,6 28,6 3
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 108 30,2 30,2 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 33,3 33,3 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 36,5 36,5 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 39,7 39,7 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 44,5 - 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 49,2 - 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 55,6 - 9,5
14 350 533 476,2 11/8 (28,6) 12 1 34,9 400 57,2 - 9,5
16 400 597 539,8 11/8 (28,6) 16 1 36,5 457 63,5 - 9,5
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 39,7 505 68,3 - 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 73,0 - 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 82,6 - 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 14 - Socket weld and weld neck flange
passage-des-boulons-brides-class-150 type14-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Depth of the
socket weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size		 Slip-on, socket weld
and weld-on plate		 with neck to be
butt-welded
 NPS DN D K L     C2 N H1 B1 B3 U R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 15,9 22,4 15,8 9,5 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 38 15,9 27,7 20,8 11,0 3
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 49 17,5 34,5 26,7 12,5 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 59 20,6 43,2 35,1 14,5 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 65 22,2 49,5 40,9 16,0 3
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 78 25,4 62,0 52,6 17,5 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 90 28,6 74,7 62,7 19,0 3
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 108 30,2 90,7 78,0 20,5 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 33,3 116,1 102,4 - 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 36,5 143,8 128,3 - 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 39,7 170,7 154,2 - 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 44,5 221.5 202,7 - 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 49,2 276,4 254,5 - 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 55,6 327,2 304,8 - 9,5
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 400 57,2 359,2 To be specified
by the buyer		 - 9,5
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 457 63,5 410,5 - 9,5
18 450 635 577,8 1 1/4(31,8) 16 1 1/8 39,7 505 68,3 461,8 - 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 73,0 513,1 - 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 82,6 616,0 - 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-150 type15-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C2 N H2 B2 r R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 15,9 23,0 3,0 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 12,7 38 15,9 28,0 3,0 3
1 25 108 79,4 5/8 (15,9) 4 1/2 14,3 49 17,5 35,0 3,0 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 15,9 59 20,6 43,5 5,0 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 17,5 65 22,2 50,0 6,5 3
2 50 152 120,6 3/4 (19,0) 4 5/8 19,0 78 25,4 62,5 8,0 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 22,2 90 28,6 75,5 8,0 3
3 80 190 152,4 3/4 (19,0) 4 5/8 23,8 108 30,2 91,5 9,5 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 33,3 117,0 11,0 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 36,5 145,0 11,0 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 39,7 171,0 12,5 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 44,5 222,0 12,5 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 49,2 277,0 12,5 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 55,6 328,0 12,5 9,5
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 400 79,4 360,0 12,5 9,5
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 457 87,3 411,0 12,5 9,5
18 450 635 577,8 1 1/4 (31,8) 16 1 1/8 39,7 505 96,8 462,0 12,5 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 103,2 514,0 12,5 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 111,1 616.0 12,5 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Class 150 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-150 type21-brides-class-150
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of
base neck		 Ø of neck to
the right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C3 N A R1
mm mm Pouce (mm)   Pouce mm mm mm mm
1/2 15 89 60,3 5/8 (15,9) 4 1/2 11,1 30 21,3 3
3/4 20 98 69,8 5/8 (15,9) 4 1/2 11,1 38 26,7 3
1 25 108 79,4 5/8 (15,9) 4 1/2 11,1 49 33,4 3
1 1/4 a) 32 117 88,9 5/8 (15,9) 4 1/2 12,7 59 42,2 3
1 1/2 40 127 98,4 5/8 (15,9) 4 1/2 14,3 65 48,3 3
2 50 152 120,6 3/4 (19,0) 4 5/8 15,9 78 60,3 3
2 1/2 a) 65 178 139,7 3/4 (19,0) 4 5/8 17,5 90 73,0 3
3 80 190 152,4 3/4 (19,0) 4 5/8 19,0 108 88,9 3
4 100 229 190,5 3/4 (19,0) 8 5/8 23,8 135 114,3 3
5 a) 125 254 215,9 7/8 (22,2) 8 3/4 23,8 164 141,3 6,5
6 150 279 241,3 7/8 (22,2) 8 3/4 25,4 192 168,3 6,5
8 200 343 298,4 7/8 (22,2) 8 3/4 28,6 246 219,1 6,5
10 250 406 362,0 1 (25,4) 12 7/8 30,2 305 273,0 6,5
12 300 483 431,8 1 (25,4) 12 7/8 31,8 365 323,9 9,5
14 350 533 476,2 1 1/8 (28,6) 12 1 34,9 400 355,6 9,5
16 400 597 539,8 1 1/8 (28,6) 16 1 36,5 457 406,4 9,5
18 450 635 577,8 1 1/4(31,8) 16 1 1/8 39,7 505 457,2 9,5
20 500 698 635,0 1 1/4 (31,8) 20 1 1/8 42,9 559 508,0 9,5
24 600 813 749,3 1 3/8 (34,9) 20 1 1/4 47,6 664 609,6 9,5

a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse

Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 150 flanges (kg)
DN Type
01 05 11 12 13 14 15
15 0,42 0,42 0,49 0,39 0,41 0,40 0,45
20 0,61 0,61 0,72 0,56 0,57 0,57 0,62
25 0,85 0,86 1,05 0,78 0,80 0,79 0,85
32 1,11 1,16 1,38 1,02 1,05 1,05 1,10
40 1,39 1,53 1,77 1,32 1,37 1,35 1,41
50 2,18 2,41 2,64 2,05 2,12 2,10 2,17
65 3,46 3,95 4,21 3,28 3,40 3,38 3,45
80 4,05 4,90 5,04 3,83 3,99 3,96 3,99
100 5,76 7,03 7,13 5,33 5,56 - 5,53
125 6,63 8,63 8,98 6,08 6,45 - 6,26
150 8,29 11,30 11,00 7,42 7,90 - 7,67
200 13,15 19,65 18,24 12,12   - 12,46
250 18,39 28,74 24,94 16,46 - - 16,87
300 29,89 43,43 38,28 26,28 - - 26,89
350 37,48 57,99 50,35 34,49 - - 39,47
400 50,52 76,05 62,55 44,85 - - 51,75
450 58,99 93,72 71,07 48,89 - - 57,13
500 72,86 122,27 87,56 61,77 - - 71,59
600 96,74 185,27 119,59 87,17 - - 99,52
Calculated masses of raised face flanges must be used only as a guide.

Class 300

Class 300 Flange - DN 15 to 600 - ASME B16.5

+ - Class 300 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-300 type-05-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C G
mm mm Pouce (mm)   Pouce mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 -
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 -
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 -
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 -
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 -
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 -
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 38
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 51
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 76
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 102
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 127
8 200 381 330,2 1 (25,4) 12 7/8 41,3 200
10 250 444 387,4 11/8 (28,6) 16 1 47,6 225
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 279
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 311
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 362
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 406
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 457
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 559
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-300 type-11-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A H3 B3 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 21,3 52,4 15,8 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 26,7 57,2 20,8 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 33,4 61,9 26,7 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 42,2 65,1 35,1 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 48,3 68,3 40,9 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 60,3 69,9 52,6 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 73,0 76,2 62,7 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 88,9 79,4 78,0 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 114,3 85,7 102,4 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 141,3 98,4 128,3 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 168,3 98,4 154,2 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 219,1 111,1 202,7 6,5
10 250 444 387,4 1 1/8 (28,6) 16 1 47,6 321 273,0 117,5 254,5 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 323,9 130,2 304,8 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 355,6 142,9 To be specified
by the buyer		 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 406,4 146,1 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 457,2 158,8 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 508,0 162,0 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 609,6 168,3 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 12 - Slip-on and weld neck flange
passage-des-boulons-brides-class-300 type-12-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 B1 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 22,4 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 25,4 27,7 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 34,5 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 27,0 43,2 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 30,2 49,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 33,3 62,0 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 38,1 74,7 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 42,9 90,7 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 47,6 116,1 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 50,8 143,8 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 52,4 170,7 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 61,9 221,5 6,5
10 250 444 387,4 1 1/8 (28,6) 16 1 47,6 321 66,8 276,4 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 73,0 327,2 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 76,2 359,2 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 82,6 410,5 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 88,9 461,8 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 95,3 513,1 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 106,4 616,0 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-300 type-13-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Minimum
thread length		 mini Ø
countersink		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 T V R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 16 23,5 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 25,4 16 29,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 17 36,0 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 27,0 21 44,5 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 30,2 22 50,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 33,3 29 63,5 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 38,1 32 76,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 42,9 32 92,0 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 47,6 37 118,0 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 50,8 43 145,0 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 52,4 46 171,0 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 61,9 - - 6,5
10 250 444 387,4 11/8 (28,6) 16 1 47,6 321 66,8 - - 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 73,0 - - 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 76,2 - - 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 82,6 - - 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 88,9 - - 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 95,3 - - 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 106,4 - - 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 14 - Socket weld and weld neck flange
passage-des-boulons-brides-class-300 type-14-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Depth of the
socket weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size		 Slip-on, socket weld
and weld-on plate		 with neck to be
butt-welded
NPS DN D K L     C N H1 B1 B3 U R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 22,4 15,8 9,5 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 25,4 27,7 20,8 11,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 34,5 26,7 12,5 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 27,0 43,2 35,1 14,5 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 30,2 49,5 40,9 16,0 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 33,3 62,0 52,6 17,5 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 38,1 74,7 62,7 19,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 42,9 90,7 78,0 20,5 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 47,6 116,1 102,4 - 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 50,8 143,8 128,3 - 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 52,4 170,7 154,2 - 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 61,9 221,5 202,7 - 6,5
10 250 444 387,4 11/8 (28,6) 16 1 47,6 321 66,8 276,4 254,5 - 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 73,0 327,2 304,8 - 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 76,2 359,2 To be specified
by the buyer		 - 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 82,6 410,5 - 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 88,9 461,8 - 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 95,3 513,1 - 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 106,4 616,0 - 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-300 type-15-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H2 B2 r R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 23,0 3,0 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 25,4 28,0 3,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 35,0 3,0 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 27,0 43,5 5,0 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 30,2 50,0 6,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 33,3 62,5 8,0 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 38,1 75,5 8,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 42,9 91,5 9,5 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 47,6 117,0 9,5 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 50,8 145,0 11,0 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 52,4 171,0 12,5 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 61,9 222,0 12,5 6,5
10 250 444 387,4 1 1/8 (28,6) 16 1 47,6 321 95,3 277,0 12,5 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 101,6 328,0 12,5 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 111,1 360,0 12,5 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 120,7 411,0 12,5 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 130,2 462,0 12,5 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 139,7 514,0 12,5 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 152,4 616,0 12,5 9,5
aa) It is useful to avoid using these dimensions in new constructions.
+ - Class 300 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-300 type-21-brides-class-300
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A R1
mm mm Pouce (mm)   Pouce mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 21,3 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 26,7 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 33,4 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 42,2 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 48,3 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 60,3 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 73,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 88,9 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 114,3 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 141,3 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 168,3 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 219,1 6,5
10 250 444 387,4 1 1/8 (28,6) 16 1 47,6 321 273,0 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 323,9 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 355,6 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 406,4 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 457,2 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 508,0 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 609,6 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse
 
Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 300 flanges (kg)
DN Type
01 05 11 12 13 14 15
15 - 0,64 0,77 0,64 0,66 0,66 0,70
20 - 1,10 1,30 1,11 1,13 1,14 1,21
25 - 1,39 1,64 1,36 1,40 1,41 1,47
32 - 1,78 2,09 1,67 1,72 1,72 1,79
40 - 2,67 3,00 2,51 2,57 2,57 2,66
50 - 3,17 3,52 2,87 2,96 2,97 3,01
65 - 4,83 5,32 4,30 4,46 4,49 4,48
80 - 6,84 7,19 5,87 6,10 6,17 6,07
100 - 11,52 11,63 9,64 9,98 - 9,94
125 - 15,51 15,52 12,14 12,65 - 12,42
150 - 20,95 19,91 15,69 16,32 - 16,14
200 - 34,35 30,89 24,21 - - 24,77
250 - 53,23 44,34 33,97 - - 39,23
300 - 78,86 64,04 49,92 - - 56,60
350 - 105,40 89,10 69,51 - - 81,63
400 - 137,77 111,00 88,49 - - 105,12
450 - 175,18 136,08 108,38 - - 128,16
500 - 221,43 164,68 134,30 - - 158,03
600 - 338,78 238,07 201,06 - - 236,32
Calculated masses of raised face flanges must be used only as a guide.

Class 600

Class 600 Flange - DN 15 to 600 - ASME B16.5

+ - Class 600 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-600 type-05-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C G
mm mm in (mm)   in mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 -
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 -
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 -
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 -
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 -
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 -
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 38
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 51
4 100 273 215,9 1 (25,4) 8 7/8 38,1 76
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 102
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 127
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 175
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 222
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 273
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 302
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 349
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 394
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 438
24 600 940 838,2 2 (50,8) 24 17/8 101,6 533
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-600 type-11-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A B3 R1
mm mm in (mm)   in mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 21,3 To be specified
by the buyer		 3
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 48 26,7 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 33,4 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 64 42,2 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 70 48,3 3
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 84 60,3 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 100 73,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 117 88,9 3
4 100 273 215,9 1 (25,4) 8 7/8 38,1 152 114,3 3
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 189 141,3 6,5
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 222 168,3 6,5
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 273 219,1 6,5
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 343 273,0 6,5
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 400 323,9 11
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 432 355,6 11
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 495 406,4 11
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 546 457,2 11
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 610 508,0 11
24 600 940 838,2 2 (50,8) 24 17/8 101,6 718 609,6 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 12 - Slip-on and weld neck flange
passage-des-boulons-brides-class-600 type-12-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 B1 R1
mm mm in (mm)   in mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 22,4 3
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 48 25,4 27,7 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 34,5 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 64 28,6 43,2 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 70 31,8 49,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 84 36,5 62,0 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 100 41,3 74,7 3
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 117 46,0 90,7 3
4 100 273 215,9 1 (25,4) 8 7/8 38,1 152 54,0 116,1 3
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 189 60,3 143,8 6,5
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 222 66,8 170,7 6,5
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 273 76,2 221,5 6,5
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 343 85,7 276,4 6,5
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 400 92,1 327,2 11
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 432 93,7 359,2 11
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 495 106,4 410,5 11
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 546 117,5 461,8 11
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 610 127,0 513,1 11
24 600 940 838,2 2 (50,8) 24 17/8 101,6 718 139,7 616,0 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-600 type-13-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Minimum
thread length		 mini Ø
countersink		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 T V R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 16 23,5 3
3/4 20 117 82,6 5/8 (19,0) 4 5/8 15,9 48 25,4 16 29,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 17 36,0 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 19,0 64 27,0 21 44,5 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 20,6 70 30,2 22 50,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 22,2 84 33,3 29 63,5 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 25,4 100 38,1 32 76,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 28,6 117 42,9 32 92,0 3
4 100 254 200,0 7/8 (22,2) 8 3/4 31,8 146 47,6 37 118,0 3
5 a) 125 279 235,0 7/8 (22,2) 8 3/4 34,9 178 50,8 43 145,0 6,5
6 150 318 269,9 7/8 (22,2) 12 3/4 36,5 206 52,4 46 171,0 6,5
8 200 381 330,2 1 (25,4) 12 7/8 41,3 260 61,9 - - 6,5
10 250 444 387,4 11/8 (28,6) 16 1 47,6 321 66,8 - - 6,5
12 300 521 450,8 1 1/4 (31,8) 16 11/8 50,8 375 73,0 - - 9,5
14 350 584 514,4 1 1/4 (31,8) 20 11/8 54,0 425 76,2 - - 9,5
16 400 648 571,5 1 3/8 (34,9) 20 1 1/4 57,2 483 82,6 - - 9,5
18 450 711 628,6 1 3/8 (34,9) 24 1 1/4 60,3 533 88,9 - - 9,5
20 500 775 685,8 1 3/8 (34,9) 24 1 1/4 63,5 587 95,3 - - 9,5
24 600 914 812,8 1 5/8 (41,3) 24 1 1/2 69,8 702 106,4 - - 9,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 14 - Socket weld and weld neck flange
passage-des-boulons-brides-class-600 type-14-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Depth of the
socket weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size		 Slip-on, socket weld
and weld-on plate		 With neck to be
butt-welded
NPS DN D K L     C N H1 B1 B3 U R1
mm mm in (mm)   in mm mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 22,4 To be specified
by the buyer		 9,5 3
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 48 25,4 27,7 11,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 34,5 12,5 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 64 28,6 43,2 14,5 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 70 31,8 49,5 16,0 3
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 84 36,5 62,0 17,5 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 100 41,3 74,7 19,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 117 46,0 90,7 20,5 3
4 100 273 215,9 1 (25,4) 8 7/8 38,1 152 54,0 116,1 - 3
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 189 60,3 143,8 - 6,5
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 222 66,8 170,7 - 6,5
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 273 76,2 221,5 - 6,5
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 343 85,7 276,4 - 6,5
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 400 92,1 327,2 - 11
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 432 93,7 359,2 - 11
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 495 106,4 410,5 - 11
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 546 117,5 461,8 - 11
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 610 127,0 513,1 - 11
24 600 940 838,2 2 (50,8) 24 17/8 101,6 718 139,7 616,0 - 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-600 type-15-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H2 B2 r R1
mm mm in (mm)   in mm mm mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 22,2 23,0 3,0 3
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 48 25,4 28,0 3,0 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 27,0 35,0 3,0 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 64 28,6 43,5 5,0 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 70 31,8 50,0 6,5 3
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 84 36,5 62,5 8,0 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 100 41,3 75,5 8,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 117 46,0 91,5 9,5 3
4 100 273 215,9 1 (25,4) 8 7/8 38,1 152 54,0 117,0 9,5 3
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 189 60,3 145,0 11,0 6,5
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 222 66,8 171,0 12,5 6,5
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 273 76,2 222,0 12,5 6,5
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 343 111,1 277,0 12,5 6,5
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 400 117,5 328,0 12,5 11
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 432 127,0 360,0 12,5 11
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 495 139,7 411,0 12,5 11
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 546 151,4 462,0 12,5 11
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 610 165,1 514,0 12,5 11
24 600 940 838,2 2 (50,8) 24 17/8 101,6 718 184,2 616,0 12,5 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 600 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-600 type-21-brides-class-600
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A R1
mm mm in (mm)   in mm mm mm mm
1/2 15 95 66,7 5/8 (15,9) 4 1/2 14,3 38 21,3 3
3/4 20 117 82,6 3/4 (19,0) 4 5/8 15,9 48 26,7 3
1 25 124 88,9 3/4 (19,0) 4 5/8 17,5 54 33,4 3
1 1/4 a) 32 133 98,4 3/4 (19,0) 4 5/8 20,6 64 42,2 3
1 1/2 40 156 114,3 7/8 (22,2) 4 3/4 22,2 70 48,3 3
2 50 165 127,0 3/4 (19,0) 8 5/8 25,4 84 60,3 3
2 1/2 a) 65 190 149,2 7/8 (22,2) 8 3/4 28,6 100 73,0 3
3 80 210 168,3 7/8 (22,2) 8 3/4 31,8 117 88,9 3
4 100 273 215,9 1 (25,4) 8 7/8 38,1 152 114,3 3
5 a) 125 330 266,7 1 1/8 (28,6) 8 1 44,4 189 141,3 6,5
6 150 356 292,1 1 1/8 (28,6) 12 1 47,6 222 168,3 6,5
8 200 419 349,2 1 1/4(31,8) 12 11/8 55,6 273 219,1 6,5
10 250 508 431,8 1 7/8 (34,9) 16 11/4 63,5 343 273,0 6,5
12 300 559 489,0 1 3/8 (34,9) 20 11/4 66,7 400 323,9 11
14 350 603 527,0 1 1/2 (38,1) 20 13/8 69,8 432 355,6 11
16 400 686 603,2 1 5/8 (41,3) 20 11/2 76,2 495 406,4 11
18 450 743 654,0 1 3/4 (44,4) 20 15/8 82,6 546 457,2 11
20 500 813 723,9 1 3/4 (44,4) 24 15/8 88,9 610 508,0 11
24 600 940 838,2 2 (50,8) 24 17/8 101,6 718 609,6 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse
Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 600 flanges (kg)
DN Type
01 05 11 12 13 14 15
15 - 0,76 0,89 0,74 0,76 0,76 0,70
20 - 1,27 1,49 1,26 1,29 1,29 1,21
25 - 1,61 1,88 1,53 1,57 1,58 1,47
32 - 2,22 2,55 2,02 2,08 2,09 1,93
40 - 3,27 3,62 2,99 3,06 3,08 2,86
50 - 4,14 4,49 3,61 3,73 3,78 3,42
65 - 6,10 6,61 5,24 5,44 5,53 5,00
80 - 8,51 8,85 7,05 7,33 7,49 6,70
100 - 17,27 17,92 14,51 14,94 - 14,00
125 - 29,38 30,01 24,38 25,05 - 23,70
150 - 36,15 36,20 28,84 29,71 - 28,10
200 - 58,89 55,59 43,37 - - 42,33
250 - 97,54 89,52 70,26 - - 75,37
300 - 124,21 107,02 84,25 - - 90,66
350 - 151,00 126,83 98,87 - - 108,32
400 - 213,77 176,16 142,20 - - 155,50
450 - 272,28 210,79 173,52 - - 188,28
500 - 349,81 262,82 220,69 - - 242,23
600 - 533,60 368,57 312,90 - - 346,29
Calculated masses of raised face flanges must be used only as a guide.

Class 900

Class 900 Flange - DN 80 to 600 - ASME B16.5

+ - Class 900 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-900 type-5-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C G
mm mm Pouce (mm)   Pouce mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 48
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 73
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 95
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 121
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 165
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 213
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 257
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 286
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 381
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 419
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 451
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 508
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 900 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-900 type-11-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A H3 B3 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 127 88,9 101,6 To be specified
by the buyer		 3
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 159 114,3 114,3 5
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 190 141,3 127,0 6,5
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 235 168,3 139,7 6,5
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 298 219,1 162,0 6,5
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 368 273,0 184,2 6,5
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 419 323,9 200,0 9,5
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 451 355,6 212,8 11,5
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 508 406,4 215,9 11
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 565 457,2 228,6 11
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 622 508,0 247,7 11
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 749 609,6 292,1 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 900 Flange - Type 12 - Slip-on and weld neck flange
passage-des-boulons-brides-class-900 type-12-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 B1 R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 127 54,0 90,7 3
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 159 69,9 116,1 5
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 190 79,4 143,8 6,5
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 235 85,7 170,7 6,5
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 298 101,6 221,5 6,5
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 368 108,0 276,4 6,5
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 419 117,5 327,2 9,5
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 451 130,2 359,2 11,5
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 508 133,4 410,5 11
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 565 152,4 461,8 11
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 622 158,8 513,1 11
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 749 203,2 616,0 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 900 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-900 type-13-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Minimum
thread length		 Mini Ø
countersink		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 T V R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 127 54,0 41 92 3
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 159 69,9 48 118 5
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 190 79,4 54 145 6,5
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 235 85,7 57 171 6,5
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 298 101,6 - - 6,5
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 368 108,0 - - 6,5
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 419 117,5 - - 9,5
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 451 130,2 - - 11,5
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 508 133,4 - - 11
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 565 152,4 - - 11
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 622 158,8 - - 11
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 749 203,2 - - 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 900 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-900 type-15-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H2 B2 r R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 127 54,0 91,5 9,5 3
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 159 69,9 117,0 11,0 5
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 190 79,4 145,0 11,0 6,5
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 235 85,7 171,0 12,5 6,5
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 298 114,3 222,0 12,5 6,5
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 368 127,0 277,0 12,5 6,5
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 419 142,9 328,0 12,5 9,5
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 451 155,6 360,0 12,5 11,5
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 508 165,1 411,0 12,5 11
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 565 190,5 462,0 12,5 11
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 622 209,6 514,0 12,5 11
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 749 266,7 616,0 12,5 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 900 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-900 type-21-brides-class-900
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A R1
mm mm Pouce (mm)   Pouce mm mm mm mm
For DN 1/2 to 2 1/2 see flanges Class 1500
3 80 241 190,5 1 (25,4) 8 7/8 38,1 127 88,9 3
4 100 292 235,0 1 1/4 (31,8) 8 1 1/8 44,4 159 114,3 5
5 a) 125 349 279,4 1 3/8 (34,9) 8 1 1/4 50,8 190 141,3 6,5
6 150 381 317,5 1 1/4 (31,8) 12 1 1/8 55,6 235 168,3 6,5
8 200 470 393,7 1 1/2 (38,1) 12 1 3/8 63,5 298 219,1 6,5
10 250 546 469,9 1 1/2 (38,1) 16 1 3/8 69,8 368 273,0 6,5
12 300 610 533,4 1 1/2 (38,1) 20 1 3/8 79,4 419 323,9 9,5
14 350 641 558,8 1 5/8 (41,3) 20 1 1/8 85,7 451 355,6 11,5
16 400 705 616,0 1 3/4 (44,4) 20 1 5/8 88,9 508 406,4 11
18 450 787 685,8 2 (50,8) 20 1 7/8 101,6 565 457,2 11
20 500 857 749,3 2 1/8 (54,0) 20 2 108,0 622 508,0 11
24 600 1 041 901,7 2 5/8 (66,7) 20 2 1/2 139,7 749 609,6 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse
Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 900 flanges (kg)
DN Type
01 05 11 12 13 14 15
80 - 13,07 14,02 11,58 11,91 - 11,22
100 - 22,10 23,12 19,73 20,27 - 19,20
125 - 36,46 37,05 31,88 32,75 - 31,17
150 - 47,44 49,23 41,14 42,25 - 40,40
200 - 82,53 84,17 70,72 - - 72,75
250 - 122,44 122,85 100,45 - - 105,98
300 - 173,67 162,88 133,13 - - 141,89
350 - 206,09 186,20 153,24 - - 162,40
400 - 259,52 224,24 185,08 - - 200,10
450 - 366,87 301,27 258,06 - - 279,92
500 - 463,67 373,75 316,70 - - 351,14
600 - 875,65 681,13 604,92 - - 672,06
Calculated masses of raised face flanges must be used only as a guide.

Class 1500

Class 1500 Flange - DN 15 to 600 - ASME B16.5

+ - Class 1500 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-1500 type-05-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C G
mm mm Pouce (mm)   Pouce mm mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 -
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 -
1 25 149 101,6 1 (25,4) 4 7/8 28,6 -
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 -
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 -
2 50 216 165,1 1 (25,4) 8 7/8 38,1 -
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 32
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 44
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 66
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 86
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 111
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 152
10 250 584 482,6 2 (50,8) 12 17/8 108,0 197
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 238
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 263
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 305
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 346
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 390
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 473
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 1500 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-1500 type-11-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Height of
the neck		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A H3 R1
mm mm Pouce (mm)   Pouce mm mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 21,3 60,3 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 26,7 69,9 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 33,4 73,0 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 42,2 73,0 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 48,3 82,6 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 60,3 101,6 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 73,0 104,8 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 88,9 117,5 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 114,3 123,8 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 141,3 155,6 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 168,3 171,5 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 219,1 212,7 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 273,0 254,0 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 323,9 282,6 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 355,6 298,5 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 406,4 311,2 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 457,2 327,0 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 508,0 355,6 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 609,6 406,4 11

a) It is useful to avoid using these dimensions in new constructions.
B3 : To be specified by the buyer
+ - Class 1500 Flange - Type 12 - Slip-on and weld neck flange
passage-des-boulons-brides-class-1500 type-12-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 B1 R1
mm mm Pouce (mm)   Pouce mm mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 31,8 22,4 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 34,9 27,7 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 41,3 34,5 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 41,3 43,2 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 44,5 49,5 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 57,2 62,0 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 63,5 74,7 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 73,0 - 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 90,5 - 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 104,8 - 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 119,1 - 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 142,9 - 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 158,8 - 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 181,0 - 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 - - 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 - - 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 - - 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 - - 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 - - 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 1500 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-1500 type-13-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Minimum
thread length		 Mini Ø
countersink		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 T V R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 31,8 22 23,5 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 34,9 25 29,0 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 41,3 29 36,0 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 41,3 30 44,5 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 44,5 32 50,5 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 57,2 38 63,5 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 63,5 48 76,0 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 73,0 51 92,0 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 90,5 57 118,0 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 104,8 64 145,0 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 119,1 70 171,0 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 142,9 - - 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 158,8 - - 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 181,0 - - 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 - - - 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 - - - 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 - - - 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 - - - 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 - - - 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 1500 Flange - Type 14 - Socket weld and weld neck flange
passage-des-boulons-brides-class-1500 passage-des-boulons-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Depth of the
socket weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H1 B1 U R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 31,8 22,4 9,5 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 34,9 27,7 11,0 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 41,3 34,5 12,5 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 41,3 43,2 14,5 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 44,5 49,5 16,0 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 57,2 62,0 17,5 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 63,5 74,7 19,0 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 73,0 - - 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 90,5 - - 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 104,8 - - 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 119,1 - - 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 142,9 - - 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 158,8 - - 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 181,0 - - 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 - - - 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 - - - 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 - - - 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 - - - 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 - - - 11
a) It is useful to avoid using these dimensions in new constructions.
B3 : To be specified by the buyer
+ - Class 1500 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-1500 type-15-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Ø of bore Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H2 B2 r R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 31,8 23,0 3,0 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 34,9 28,0 3,0 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 41,3 35,0 3,0 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 41,3 43,5 5,0 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 44,5 50,0 6,5 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 57,2 62,5 8,0 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 63,5 75,5 8,0 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 73,0 91,5 9,5 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 90,5 117,0 11,0 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 104,8 145,0 11,0 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 119,1 171,0 12,5 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 142,9 222,0 12,5 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 177,8 277,0 12,5 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 219,1 328,0 12,5 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 241,3 360,0 12,5 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 260,4 411,0 12,5 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 276,2 462,0 12,5 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 292,1 514,0 12,5 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 330,2 616,0 12,5 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 1500 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-1500 type-21-brides-class-1500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
 NPS DN D K L     C N A R1
mm mm Pouce (mm)   Pouce mm mm mm Mm
1/2 15 121 82,6 7/8 (22,2) 4 3/4 22,2 38 21,3 5
3/4 20 130 88,9 7/8 (22,2) 4 3/4 25,4 44 26,7 5
1 25 149 101,6 1 (25,4) 4 7/8 28,6 52 33,4 5
1 1/4 a) 32 159 111,1 1 (25,4) 4 7/8 28,6 64 42,2 5
1 1/2 40 178 123,8 1 1/8 (28,6) 4 1 31,8 70 48,3 5
2 50 216 165,1 1 (25,4) 8 7/8 38,1 105 60,3 5
2 1/2 a) 65 244 190,5 1 1/8 (28,6) 8 1 41,3 124 73,0 5
3 80 267 203,2 1 1/4 (31,8) 8 11/8 47,6 133 88,9 5
4 100 311 241,3 1 3/8 (34,9) 8 11/4 54,0 162 114,3 5
5 a) 125 375 292,1 1 5/8 (41,3) 8 11/2 73,0 197 141,3 6,5
6 150 394 317,5 1 1/2 (38,1) 12 13/8 82,6 229 168,3 6,5
8 200 483 393,7 1 3/4 (44,4) 12 15/8 92,1 292 219,1 6,5
10 250 584 482,6 2 (50,8) 12 17/8 108,0 368 273,0 9,5
12 300 673 571,5 2 1/8 (54,0) 16 2 123,8 451 323,9 11
14 350 749 635,0 2 3/8 (60,3) 16 21/4 133,4 495 355,6 11
16 400 826 704,8 2 5/8 (66,7) 16 21/2 146,1 552 406,4 11
18 450 914 774,7 2 7/8 (73,0) 16 23/4 161,9 597 457,2 11
20 500 984 831,8 3 1/8 (79,4) 16 3 178,0 641 508,0 11
24 600 1 168 990,6 3 5/8 (92,0) 16 31/2 203,0 762 609,6 11
a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse
Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 1500 flanges (kg)
DN Type
01 05 11 12 13 14 15
15 - 1,78 1,91 1,75 1,78 1,79 1,72
20 - 2,41 2,59 2,33 2,36 2,39 2,28
25 - 3,56 3,77 3,42 3,48 3,53 3,36
32 - 4,16 4,42 3,93 4,01 4,07 3,84
40 - 5,78 6,08 5,40 5,50 5,57 5,27
50 - 10,08 11,14 9,87 10,05 10,22 9,67
65 - 13,93 15,34 13,62 13,92 14,20 13,37
80 - 19,18 20,34 - 18,35 - 17,55
100 - 29,93 30,56 - 28,46 - 27,23
125 - 58,51 58,15 - 53,06 - 51,17
150 - 72,02 70,16 - 62,78 - 60,51
200 - 121,91 119,78 - - - 102,32
250 - 210,62 204,65 - - - 180,64
300 - 315,83 304,04 - - - 284,28
350 - 420,57 399,73 - - - 383,75
400 - 559,16 508,66 - - - 493,98
450 - 759,99 659,54 - - - 636,46
500 - 965,37 806,96 - - - 765,15
600 - 1 556,84 1 278,03 - - - 1 220,79
Calculated masses of raised face flanges must be used only as a guide.

Class 2500

Class 2500 Flange - DN 15 to 300 - ASME B16.5

+ - Class 2500 Flange - Type 05 - Blind flange
passage-des-boulons-brides-class-2500 type-05-brides-class-2500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of shoulder
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C G
mm mm Pouce (mm)   Pouce mm mm
1/2 15 133 88,9 7/8 (22,2) 4 3/4 30,2 -
3/4 20 140 95,2 7/8 (22,2) 4 3/4 31,7 -
1 25 159 107,9 1 (25,4) 4 7/8 34,9 -
1 1/4 a) 32 184 130,2 1 1/8 (28,6) 4 1 38,1 -
1 1/2 40 203 146,0 1 1/4 (31,8) 4 1 1/8 44,4 -
2 50 235 171,4 1 1/8 (28,6) 8 1 50,8 -
2 1/2 a) 65 267 196,8 1 1/4 (31,8) 8 1 1/8 57,1 22
3 80 305 228,6 1 3/8 (34,9) 8 1 1/4 66,7 32
4 100 356 273,0 1 5/8 (41,3) 8 1 1/2 76,2 48
5 a) 125 419 323,8 1 7/8 (47,6) 8 1 3/4 92,1 67
6 150 483 368,3 2 1/8 (54,0) 8 2 108,0 86
8 200 552 438,1 2 1/8 (54,0) 12 2 127,0 96
10 250 673 539,7 2 5/8 (66,7) 12 2 1/2 165,1 159
12 300 762 619,1 2 7/8 (73,0) 12 2 3/4 184,1 193
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 2500 Flange - Type 11 - Flange with butt-weld neck
passage-des-boulons-brides-class-2500 type-11-brides-class-2500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Height of
the neck		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N H3 R1
mm mm Pouce (mm)   Pouce mm mm mm mm
1/2 15 133 88,9 7/8 (22,2) 4 3/4 30,2 43 73,0 5
3/4 20 140 95,2 7/8 (22,2) 4 3/4 31,7 51 79,4 5
1 25 159 107,9 1 (25,4) 4 7/8 34,9 57 88,9 5
1 1/4 a) 32 184 130,2 1 1/8 (28,6) 4 1 38,1 73 95,3 5
1 1/2 40 203 146,0 1 1/4 (31,8) 4 1 1/8 44,4 79 111,1 9,5
2 50 235 171,4 1 1/8 (28,6) 8 1 50,8 95 127,0 9,5
2 1/2 a) 65 267 196,8 1 1/4 (31,8) 8 1 1/8 57,1 114 142,9 9,5
3 80 305 228,6 1 3/8 (34,9) 8 1 1/4 66,7 133 168,3 9,5
4 100 356 273,0 1 5/8 (41,3) 8 1 1/2 76,2 165 190,5 9,5
5 a) 125 419 323,8 1 7/8 (47,6) 8 1 3/4 92,1 203 228,6 9,5
6 150 483 368,3 2 1/8 (54,0) 8 2 108,0 235 273,1 15,5
8 200 552 438,1 2 1/8 (54,0) 12 2 127,0 305 317,5 15,5
10 250 673 539,7 2 5/8 (66,7) 12 2 1/2 165,1 375 419,1 15,5
12 300 762 619,1 2 7/8 (73,0) 12 2 3/4 184,1 441 463,6 15,5
a) It is useful to avoid using these dimensions in new constructions.
B3 : To be specified by the buyer
+ - Class 2500 Flange - Type 13 - Threaded flange with neck
passage-des-boulons-brides-class-2500 type-13-brides-class-2500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Height of
the neck		 Minimum
thread length		 Mini Ø
countersink		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C H1 T V R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm
1/2 15 133 88,9 7/8 (22,2) 4 3/4 30,2 39,7 29 23,5 5
3/4 20 140 95,2 7/8 (22,2) 4 3/4 31,7 42,9 32 29,0 5
1 25 159 107,9 1 (25,4) 4 7/8 34,9 47,6 35 35,0 5
1 1/4 a) 32 184 130,2 1 1/8 (28,6) 4 1 38,1 52,4 38 44,5 5
1 1/2 40 203 146,0 1 1/4 (31,8) 4 1 1/8 44,4 60,3 44 50,5 9,5
2 50 235 171,4 1 1/8 (28,6) 8 1 50,8 69,9 51 63,5 9,5
2 1/2 a) 65 267 196,8 1 1/4 (31,8) 8 1 1/8 57,1 79,4 57 76,0 9,5
3 80 305 228,6 1 3/8 (34,9) 8 1 1/4 66,7 92,1 64 92,0 9,5
4 100 356 273,0 1 5/8 (41,3) 8 1 1/2 76,2 108,0 70 118,0 9,5
5 a) 125 419 323,8 1 7/8 (47,6) 8 1 3/4 92,1 130,2 76 145,0 9,5
6 150 483 368,3 2 1/8 (54,0) 8 2 108,0 152,4 83 171,0 15,5
8 200 552 438,1 2 1/8 (54,0) 12 2 127,0 - - - 15,5
10 250 673 539,7 2 5/8 (66,7) 12 2 1/2 165,1 - - - 15,5
12 300 762 619,1 2 7/8 (73,0) 12 2 3/4 184,1 - - - 15,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 2500 Flange - Type 15 - Rotating flange with neck for the end of the pipework with a drawn neck
passage-des-boulons-brides-class-2500 type-15-brides-class-2500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Height of
the neck		 Ø
d'alésage		 Joint radius
of the flange bore (min.)		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A H2 B2 r R1
mm mm Pouce (mm)   Pouce mm mm mm mm mm mm mm
1/2 15 133 88,9 7/8 (22,2) 4 3/4 30,2 43 21,3 39,7 23,0 3,0 5
3/4 20 140 95,2 7/8 (22,2) 4 3/4 31,7 51 26,7 42,9 28,0 3,0 5
1 25 159 107,9 1 (25,4) 4 7/8 34,9 57 33,4 47,6 35,0 3,0 5
1 1/4 a) 32 184 130,2 1 1/8 (28,6) 4 1 38,1 73 42,2 52,4 43,5 5,0 5
1 1/2 40 203 146,0 1 1/4 (31,8) 4 1 1/8 44,4 79 48,3 60,3 50,0 6,5 9,5
2 50 235 171,4 1 1/8 (28,6) 8 1 50,8 95 60,3 69,9 62,5 8,0 9,5
2 1/2 a) 65 267 196,8 1 1/4 (31,8) 8 1 1/8 57,1 114 73,0 79,4 75,5 8,0 9,5
3 80 305 228,6 1 3/8 (34,9) 8 1 1/4 66,7 133 88,9 92,1 91,5 9,5 9,5
4 100 356 273,0 1 5/8 (41,3) 8 1 1/2 76,2 165 114,3 108,0 117,0 11,0 9,5
5 a) 125 419 323,8 1 7/8 (47,6) 8 1 3/4 92,1 203 141,3 130,2 145,0 11,0 9,5
6 150 483 368,3 2 1/8 (54,0) 8 2 108,0 235 168,3 152,4 171,0 12,5 15,5
8 200 552 438,1 2 1/8 (54,0) 12 2 127,0 305 219,1 177,8 222,0 12,5 15,5
10 250 673 539,7 2 5/8 (66,7) 12 2 1/2 165,1 375 273,0 228,6 277,0 12,5 15,5
12 300 762 619,1 2 7/8 (73,0) 12 2 3/4 184,1 441 323,9 254,0 328,0 12,5 15,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Class 2500 Flange - Type 21 - Integral flange
passage-des-boulons-brides-class-2500 type-21-brides-class-2500
Click to collapse
Nominal
diameter		 Ext. Ø
of flange		 Ø of
drilling circle		 Bolts Flange
thickness		 Ø of base
neck		 Ø of neck to the
right of the weld		 Joint radius
of the neck (min.)
Ø of
bolt holes		 Number Nominal
size
NPS DN D K L     C N A R1
mm mm Pouce (mm)   Pouce mm mm mm mm
1/2 15 133 88,9 7/8 (22,2) 4 3/4 30,2 43 21,3 5
3/4 20 140 95,2 7/8 (22,2) 4 3/4 31,7 51 26,7 5
1 25 159 107,9 1 (25,4) 4 7/8 34,9 57 33,4 5
1 1/4 a) 32 184 130,2 1 1/8 (28,6) 4 1 38,1 73 42,2 5
1 1/2 40 203 146,0 1 1/4 (31,8) 4 1 1/8 44,4 79 48,3 9,5
2 50 235 171,4 1 1/8 (28,6) 8 1 50,8 95 60,3 9,5
2 1/2 a) 65 267 196,8 1 1/4 (31,8) 8 1 1/8 57,1 114 73,0 9,5
3 80 305 228,6 1 3/8 (34,9) 8 1 1/4 66,7 133 88,9 9,5
4 100 356 273,0 1 5/8 (41,3) 8 1 1/2 76,2 165 114,3 9,5
5 a) 125 419 323,8 1 7/8 (47,6) 8 1 3/4 92,1 203 141,3 9,5
6 150 483 368,3 2 1/8 (54,0) 8 2 108,0 235 168,3 15,5
8 200 552 438,1 2 1/8 (54,0) 12 2 127,0 305 219,1 15,5
10 250 673 539,7 2 5/8 (66,7) 12 2 1/2 165,1 375 273,0 15,5
12 300 762 619,1 2 7/8 (73,0) 12 2 3/4 184,1 441 323,9 15,5
a) It is useful to avoid using these dimensions in new constructions.
+ - Tolerances Click to collapse
Dimension Types of flange Tolerances
mm		 Nominal diameter
Pouce
Diameter of neck at the end weld A 11, 21 + 2,4
– 0,8		 ≤ 5
+ 4,0
– 0,8		 > 5
Diameter of bore B1, B2 01, 12, 14, 15 + 0,8
– 0		 ≤ 10
+ 1,6
– 0		 > 10
Diameter of bore B3 11, 14 ± 0,8 ≤ 10
± 1,6 > 10 ≤ 18
+ 3,2
– 1,6		 > 18
Height of the neck H1, H2, H3 11, 12, 13, 14, 15 ± 1,6 ≤ 10
± 3,2 > 10
Flange thickness C All types + 3,2
0		 ≤ 18
+ 4,8
0		 > 18
External diameter of the raised face 0 All types 1,6 mm Raised face ± 0,8 mm All
6,4 mm Raised face ± 0,4 mm
Dimensions of faces M, Q, W, Y et Z All types Faces of C, D, E, F  type joints ± 0,4 mm All
Depth of the groove E for ring joint All types Faces of C type joints + 4,8
– 0		 All
Thickness of groove F ± 0,2 mm  
Diameter at the centre of groove P ± 0,13 mm  
Angle 23° ± ½°  
Diameter of drilling circle K All types ± 1,6 mm All
Spacing between two adjacent bolt holes All types ± 0,8 mm All
Eccentricity between the drilling circle and the diameters of the machined faces All types 0,8 mm ≤ 2½
1,6 mm > 2½
Parallelism between the supporting surfaces of the bolts and the joint faces of the flange All types 1° All
+ - Masse Click to collapse
Masses of Class 2500 flanges (kg)
DN Type
01 05 11 12 13 14 15
15 - 2,98 3,23 - 2,97 - 2,91
20 - 3,52 3,90 - 3,51 - 3,42
25 - 4,99 5,53 - 4,91 - 4,78
32 - 7,34 8,19 - 7,23 - 7,04
40 - 10,38 11,48 - 10,12 - 9,86
50 - 15,58 17,22 - 15,05 - 14,63
65 - 22,68 25,44 - 21,88 - 21,25
80 - 34,88 38,92 - 33,18 - 32,26
100 - 54,11 60,07 - 50,74 - 49,35
125 - 90,76 100,27 - 84,40 - 82,20
150 - 141,64 156,37 - 130,14 - 127,45
200 - 214,06 233,79 - - - 186,30
250 - 410,84 445,71 - - - 353,61
300 - 592,20 628,13 - - - 501,81
Calculated masses of raised face flanges must be used only as a guide.
© 2023 Tecalemit Flexibles. All Rights Reserved.
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Monday, March 27, 2023
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