Home Product Catalog Pipes BW Fittings SW&THD Fittings Flanges Valves Materials Conversion Contact Us
Type of Flanges
Class & Size Range
Weld Neck Flanges
Slip On Flanges
Socket Weld Flanges
Lap Joint Flanges
Blind Flanges
Threaded Flanges
ASME B 16.47 A
ASME B16.47 B
WN Flange Bore
Figure 8 Blanks
Ring Joint Facing
AWWA Steel Ring
AWWA Steel hub
Approx Weight
Gaskets
Bolts & Nuts
PL Flanges (EN1092.1)
WN Flanges (EN1092.1)
SO Flanges (EN1092.1)
Th Flanges (EN1092.1)
BL Flanges (EN1092.1)
Backing Rings

Blind Flanges 










f=2mm on class 150 and 300.
  =7mm on class 400 and higher.

Dimesions of  BL flanges - ASME B16.5 


Class 150

DN 
 NPS   Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 90 9.6 34.9 4 15.7 60.3
20  3/4 100 11.2 42.9 4 15.7 69.9
25 1 110 12.7 50.8 4 15.7 79.4
32 1 1/4 115 14.3 63.5 4 15.7 88.9
40 1 1/2 125 15.9 73 4 15.7 98.4
50 2 150 17.5 92.1 4 19.1 120.7
65 2 1/2 180 20.7 104.8 4 19.1 139.7
80 3 190 22.3 127 4 19.1 152.4
90 3 1/2 215 22.3 139.7 8 19.1 177.8
100 4 230 22.3 157.2 8 19.1 190.5
125 5 255 22.3 185.7 8 22.4 215.9
150 6 280 23.9 215.9 8 22.4 241.3
200 8 345 27 269.9 8 22.4 298.5
250 10 405 28.6 323.8 12 25.4 362
300 12 485 30.2 381 12 25.4 431.8
350 14 535 33.4 412.8 12 28.4 476.3
400 16 595 35 469.9 16 28.4 539.8
450 18 635 38.1 533.4 16 31.75 577.9
500 20 700 41.3 584.2 20 31.75 635
600 24 815 46.1 692.2 20 35.1 749.3
Class 300
DN 
NPS Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 95 12.7 34.9 4 15.7 66.7
20  3/4 115 14.3 42.9 4 19 82.6
25 1 125 15.9 50.8 4 19 88.9
32 1 1/4 135 17.5 63.5 4 19 98.4
40 1 1/2 155 19.1 73 4 22.3 114.3
50 2 165 20.7 92.1 8 19 127
65 2 1/2 190 23.9 104.8 8 22.3 149.2
80 3 210 27 127 8 22.3 168.3
90 3 1/2 230 28.6 139.7 8 22.3 184.2
100 4 255 30.2 157.2 8 22.3 200
125 5 280 33.4 185.7 8 22.3 235
150 6 320 35 215.9 12 22.3 269.9
200 8 380 39.7 269.9 12 25.4 330.2
250 10 445 46.1 323.8 16 28.4 387.4
300 12 520 49.3 381 16 31.7 450.8
350 14 585 52.4 412.8 20 31.7 514.4
400 16 650 55.6 469.9 20 35 571.5
450 18 710 58.8 533.4 24 35 628.6
500 20 775 62 584.2 24 35 685.8
600 24 915 68.3 692.2 24 41.1 812.8
Class 400

DN 
 
NPS
Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 95 14.3 34.9 4 15.7 66.7
20  3/4 115 15.9 42.9 4 19 82.6
25 1 125 17.5 50.8 4 19 88.9
32 1 1/4 135 20.7 63.5 4 19 98.4
40 1 1/2 155 22.3 73 4 22.3 114.3
50 2 165 25.4 92.1 8 19 127
65 2 1/2 190 28.6 104.8 8 22.3 149.2
80 3 210 31.8 127 8 22.3 168.3
90 3 1/2 230 35 139.7 8 25.4 184.2
100 4 255 35 157.2 8 25.4 200
125 5 280 38.1 185.7 8 25.4 235
150 6 320 41.3 215.9 12 35.4 269.9
200 8 380 47.7 269.9 12 28.4 330.2
250 10 445 54 323.8 16 31.75 387.4
300 12 520 57.2 381 16 35.1 450.8
350 14 585 60.4 412.8 20 35.1 514.4
400 16 650 63.5 469.9 20 38.1 571.5
450 18 710 66.7 533.4 24 38.1 628.6
500 20 775 69.9 584.2 24 41.1 685.8
600 24 915 76.2 692.2 24 47.8 812.8
Class 600
DN 
NPS Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 95 14.3 34.9 4 15.7 66.7
20  3/4 115 15.9 42.9 4 19 82.6
25 1 125 17.5 50.8 4 19 88.9
32 1 1/4 135 20.7 63.5 4 19 98.4
40 1 1/2 155 22.3 73 4 22.3 114.3
50 2 165 25.4 92.1 8 19 127
65 2 1/2 190 28.6 104.8 8 22.3 149.2
80 3 210 31.8 127 8 22.3 168.3
90 3 1/2 230 35 139.7 8 25.4 184.2
100 4 275 38.1 157.2 8 25.4 215.9
125 5 330 44.5 185.7 8 28.4 266.7
150 6 355 47.7 215.9 12 28.4 292.1
200 8 420 55.6 269.9 12 31.75 349.2
250 10 510 63.5 323.8 16 35.1 431.8
300 12 560 66.7 381 20 35.1 489
350 14 605 69.9 412.8 20 38.1 527
400 16 685 76.2 469.9 20 41.1 603.2
450 18 745 82.6 533.4 20 44.5 654
500 20 815 88.9 584.2 24 44.5 723.9
600 24 940 101.6 692.2 24 50.8 838.2
Class 900
DN 
NPS Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 120 22.3 34.9 4 22.3 82.6
20  3/4 130 25.4 42.9 4 22.3 88.9
25 1 150 28.6 50.8 4 25.4 101.6
32 1 1/4 160 28.6 63.5 4 25.4 111.1
40 1 1/2 180 31.8 73 4 28.4 123.8
50 2 215 38.1 92.1 8 25.4 165.1
65 2 1/2 245 41.3 104.8 8 28.4 190.5
80 3 240 38.1 127 8 25.4 190.5
100 4 290 44.5 157.2 8 31.7 235
125 5 350 50.8 185.7 8 35 279.4
150 6 380 55.6 215.9 12 31.7 317.5
200 8 470 63.5 269.9 12 38.1 393.7
250 10 545 69.9 323.8 16 38.1 469.9
300 12 610 79.4 381 20 38.1 533.4
350 14 640 85.8 412.8 20 41.1 558.8
400 16 705 88.9 469.9 20 44.4 616
450 18 785 101.6 533.4 20 50.8 685.8
500 20 855 108 584.2 20 53.8 749.3
600 24 1040 139.7 692.2 20 66.55 901.7
Class 1500
DN 
NPS Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 120 22.3 34.9 4 22.3 82.6
20  3/4 130 25.4 42.9 4 22.3 88.9
25 1 150 28.6 50.8 4 25.4 101.6
32 1 1/4 160 28.6 63.5 4 25.4 111.1
40 1 1/2 180 31.8 73 4 28.4 123.8
50 2 215 38.1 92.1 8 25.4 165.1
65 2 1/2 245 41.3 104.8 8 28.4 190.5
80 3 265 47.7 127 8 31.7 203.2
100 4 310 54 157.2 8 35 241.3
125 5 375 73.1 185.7 8 41.1 292.1
150 6 395 82.6 215.9 12 38.1 317.5
200 8 485 92.1 269.9 12 44.4 393.7
250 10 585 108 323.8 12 50.8 482.6
300 12 675 123.9 381 16 53.8 571.5
350 14 750 133.4 412.8 16 60.45 635
400 16 825 146.1 469.9 16 66.55 704.8
450 18 915 162 533.4 16 73.15 774.7
500 20 985 177.8 584.2 16 79.25 831.8
600 24 1170 203.2 692.2 16 91.9 990.6
Class 2500
DN 
NPS Overall Diameter  Thickness of Flange(Min.) Diameter of Face Number of Bolts Diameter of Bolt Holes  Diameter of Bolt Circle 
    A C G H I J
15  1/2 135 30.2 34.9 4 22.3 88.9
20  3/4 140 31.8 42.9 4 22.3 95.2
25 1 160 35 50.8 4 25.4 108
32 1 1/4 185 38.1 63.5 4 28.4 130.2
40 1 1/2 205 44.5 73 4 31.75 146
50 2 235 50.9 92.1 8 28.4 171.4
65 2 1/2 265 57.2 104.8 8 31.75 196.8
80 3 305 66.7 127 8 35.1 228.6
100 4 355 76.2 157.2 8 41.1 273
125 5 420 92.1 185.7 8 47.8 323.8
150 6 485 108 215.9 8 53.8 368.3
200 8 550 127 269.9 12 53.8 438.2
250 10 675 165.1 323.8 12 66.55 539.8
300 12 760 184.2 381 12 73.15 619.1

HomeContact UsSitemap