ASME Standardised Flanges

ASME Blind Flanges

ASME B16 standards covers pipes and fittings made from cast or forged materials.

The ASME B16.5 pipe flanges and flange fittings standard covers pressure-temperature ratings, materials, dimensions, tolerances, marking, testing, and methods of designating openings for pipe flanges and flanged fittings.

Learn more features of our Flanges ASME...

Blind Flanges
Class 150LB

blind flanges class 150lb
Blind Flanges Class 150LB Blind forged flanges of class 150LB
Standard ASME B16.5
Core Material Carbon steel and stainless steel
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule See sheets of pipe schedule for carbon steel here, and for stainless steel here
blind flanges class 150lb
Size
inch
D
mm
G
mm
t
mm
1/2 89 35.1 11.2
3/4 99 42.9 12.7
1 108 50.8 14.2
117 63.5 15.7
127 73.2 17.5
2 152 91.9 19.1
178 104.6 22.4
3 191 127.0 23.9
216 139.7 23.9
4 229 157.2 23.9
5 254 185.7 23.9
6 279 215.9 25.4
8 343 269.7 28.4
10 406 323.9 30.2
12 483 381.0 31.8
14 533 412.8 35.1
16 597 469.9 36.6
18 635 533.4 39.6
20 699 584.2 42.9
24 813 692.2 47.8
Size Drilling Bolting
inch Bolt circle
Ø
mm
Qty
of
holes
Holes
Ø
mm
Bolt
Ø
inch
Length
mach bolt
(RF)
Length
stud bolt
(RF)
Length
stud bolt
(RJ)
1/2 60.5 4 15.7 1/2 50.8 57.2 -
3/4 69.9 4 15.7 1/2 50.8 63.5 -
1 79.2 4 15.7 1/2 57.2 63.5 76.2
88.9 4 15.7 1/2 57.2 69.9 82.6
98.6 4 15.7 1/2 63.5 69.9 82.6
2 120.7 4 19.1 5/8 69.9 82.6 95.3
139.7 4 19.1 5/8 76.2 88.9 101.6
3 152.4 4 19.1 5/8 76.2 88.9 101.6
177.8 8 19.1 5/8 76.2 88.9 101.6
4 190.5 8 19.1 5/8 76.2 88.9 101.6
5 215.9 8 22.4 3/4 82.6 95.3 108.0
6 241.3 8 22.4 3/4 82.6 101.6 114.3
8 298.5 8 22.4 3/4 88.9 108.0 120.7
10 362.0 12 25.4 7/8 101.6 114.3 127.0
12 431.8 12 25.4 7/8 101.6 120.7 133.4
14 476.3 12 28.4 1 114.3 133.4 146.1
16 539.8 16 28.4 1 114.3 133.4 146.1
18 577.9 16 31.8 11/8 127.0 146.1 158.8
20 635.0 20 31.8 11/8 139.7 158.8 171.5
24 749.3 20 35.1 152.4 171.5 184.2

Blind Flanges
Class 300LB

Blind Flanges Class 300LB Blind forged flanges of class 300LB
Standard ASME B16.5
Core Material Carbon steel and stainless steel
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule See sheets of pipe schedule for carbon steel here, and for stainless steel here
blind flanges class 300lb
Size
inch
D
mm
G
mm
t
mm
1/2 95 35.1 14.2
3/4 117 42.9 15.7
1 124 50.8 17.5
133 63.5 19.1
155 73.2 20.6
2 165 91.9 22.4
191 104.6 25.4
3 210 127.0 28.4
229 139.7 30.2
4 254 157.2 31.8
5 279 185.7 35.1
6 318 215.9 36.6
8 381 269.7 41.1
10 445 323.9 47.8
12 521 381.0 50.8
14 584 412.8 63.8
16 648 469.9 57.2
18 711 533.4 60.5
20 775 584.2 63.5
24 914 692.2 69.9
Size Drilling Bolting
inch Bolt circle
Ø
mm
Qty
of
holes
Holes
Ø
mm
Bolt
Ø
inch
Length
mach bolt
(RF)
Length
stud bolt
(RF)
Length
stud bolt
(RJ)
1/2 66.5 4 15.7 1/2 57.2 63.5 76.2
3/4 82.6 4 19.1 5/8 63.5 76.2 88.9
1 88.9 4 19.1 5/8 63.5 76.2 88.9
98.6 4 19.1 5/8 69.9 82.6 95.3
114.3 4 22.4 3/4 76.2 88.9 101.6
2 127.0 8 19.1 5/8 76.2 88.9 101.6
149.4 8 22.4 3/4 82.6 101.6 114.3
3 168.1 8 22.4 3/4 88.9 108.0 120.7
184.2 8 22.4 3/4 95.3 108.0 127.0
4 200.2 8 22.4 3/4 95.3 114.3 127.0
5 235.0 8 22.4 3/4 108.0 120.7 133.4
6 269.7 12 22.4 3/4 108.0 120.7 139.7
8 330.2 12 25.4 7/8 120.7 139.7 152.4
10 387.4 16 28.4 1 139.7 158.8 171.5
12 450.9 16 31.8 11/8 146.1 171.5 184.2
14 514.4 20 31.8 11/8 158.8 177.8 190.5
16 571.5 20 35.1 165.1 190.5 203.2
18 628.7 24 35.1 171.5 196.9 209.6
20 685.8 24 35.1 184.2 203.2 222.3
24 812.8 24 41.1 203.2 228.6 254.0

Blind Flanges
Class 600LB

Blind Flanges Class 600LB Blind forged flanges of class 600LB
Standard ASME B16.5
Core Material Carbon steel and stainless steel
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule See sheets of pipe schedule for carbon steel here, and for stainless steel here
blind flanges class 600lb
Size
inch
D
mm
G
mm
t
mm
1/2 95 35.1 14.2
3/4 117 42.9 15.7
1 124 50.8 17.5
133 63.5 20.6
155 73.2 22.4
2 165 91.9 25.4
191 104.6 28.4
3 210 127.0 31.8
229 139.7 35.1
4 273 157.2 38.1
5 330 185.7 44.5
6 356 215.9 47.8
8 419 269.7 55.6
10 508 323.9 63.5
12 559 381.0 66.5
14 603 412.8 69.9
16 686 469.9 76.2
18 743 533.4 82.6
20 813 584.2 88.9
24 940 692.2 101.6
Size Drilling Bolting
inch Bolt circle
Ø
mm
Qty
of
holes
Holes
Ø
mm
Bolt
Ø
inch
Length
mach bolt
(RF)
Length
stud bolt
(RF)
Length
stud bolt
(RJ)
1/2 66.5 4 15.7 1/2 76.2 69.9 76.2
3/4 82.6 4 19.1 5/8 88.9 82.6 88.9
1 88.9 4 19.1 5/8 88.9 82.6 88.9
98.6 4 19.1 5/8 95.3 88.9 95.3
114.3 4 22.4 3/4 108.0 101.6 108.0
2 127.0 8 19.1 5/8 108.0 101.6 108.0
149.4 8 22.4 3/4 120.7 114.3 120.7
3 168.1 8 22.4 3/4 127.0 120.7 127.0
184.2 8 25.4 7/8 139.7 133.4 139.7
4 215.9 8 25.4 7/8 146.1 139.7 146.1
5 266.7 8 28.4 1 165.1 158.8 165.1
6 292.1 12 28.4 1 171.5 165.1 171.5
8 349.3 12 31.8 11/8 190.5 184.2 196.9
10 431.8 16 35.1 215.9 209.6 215.9
12 489.0 20 35.1 222.3 215.9 222.3
14 527.1 20 38.1 13/8 235.0 228.6 235.0
16 603.3 20 41.1 254.0 247.7 254.0
18 654.1 20 44.5 15/8 273.1 266.7 273.1
20 723.9 24 44.5 15/8 285.8 279.4 292.1
24 838.2 24 50.8 17/8 330.2 323.9 336.6

Blind Flanges
Class 900LB

Blind Flanges Class 900LB Blind forged flanges of class 900LB
Standard ASME B16.5
Core Material Carbon steel and stainless steel
Connecting Finish Stock finish, spiral serration (or phonographic), concentric serration and smooth surface
Pipe Schedule See sheets of pipe schedule for carbon steel here, and for stainless steel here
blind flanges class 900lb
Size
inch
D
mm
G
mm
t
mm
1/2 121 35.1 22.4
3/4 130 42.9 25.4
1 149 50.8 28.4
159 63.5 28.4
178 73.2 31.8
2 216 91.9 38.1
244 104.6 41.1
3 241 127.0 38.1
4 292 157.2 44.5
5 349 185.7 50.8
6 381 215.9 55.6
8 470 269.7 63.5
10 546 323.9 69.9
12 610 381.0 79.2
14 641 412.8 85.9
16 705 469.9 88.9
18 787 533.4 101.6
20 857 584.2 108.0
24 1041 692.2 139.7
Size Drilling Bolting
inch Bolt circle
Ø
mm
Qty
of
holes
Holes
Ø
mm
Bolt
Ø
inch
Length
mach bolt
(RF)
Length
stud bolt
(RF)
Length
stud bolt
(RJ)
1/2 82.6 4 22.4 3/4 108.0 101.6 108.0
3/4 88.9 4 22.4 3/4 114.3 108.0 114.3
1 101.6 4 25.4 7/8 127.0 120.7 127.0
111.3 4 25.4 7/8 127.0 120.7 127.0
124.0 4 28.4 1 139.7 133.4 139.7
2 165.1 8 25.4 7/8 146.1 139.7 146.1
190.5 8 28.4 1 158.8 152.4 158.8
3 190.5 8 25.4 7/8 146.1 139.7 146.1
4 235.0 8 31.8 11/8 171.5 165.1 171.5
5 279.4 8 35.1 190.5 184.2 190.5
6 317.5 12 31.8 11/8 190.5 184.2 196.9
8 393.7 12 38.1 13/8 222.3 215.9 222.3
10 469.9 16 38.1 13/8 235.0 228.6 235.0
12 533.4 20 38.1 13/8 254.0 247.7 254.0
14 558.8 20 41.1 273.1 266.7 292.1
16 616.0 20 44.5 15/8 285.8 279.4 298.5
18 685.8 20 50.8 17/8 323.9 317.5 333.6
20 749.3 20 53.8 2 349.3 342.9 362.0
24 901.7 20 66.5 438.2 431.8 457.2