ASME Standardised Flanges

ASME Slip On 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...

Slip-On Flanges
Class 150LB

slip on flanges class 150lb
Slip-On Flanges Class 150LB Slip-On 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
slip on flanges class 150lb
Size
inch
D
mm
X
mm
G
mm
t
mm
B2
mm
T2
mm
1/2 89 30.2 35.1 11.2 22.4 15.7
3/4 99 38.1 42.9 12.7 27.7 15.7
1 108 49.3 50.8 14.2 34.5 17.5
117 58.7 63.5 15.7 43.2 20.6
127 65.0 73.2 17.5 49.5 22.4
2 152 77.7 91.9 19.1 62.0 25.4
178 90.4 104.6 22.4 74.7 28.4
3 191 108.0 127.0 23.9 90.7 30.2
216 122.2 139.7 23.9 103.4 31.8
4 229 134.9 157.2 23.9 116.1 33.3
5 254 163.6 185.7 23.9 143.8 36.6
6 279 192.0 215.9 25.4 170.7 39.6
8 343 246.1 269.7 28.4 221.5 44.5
10 406 304.8 323.9 30.2 276.4 49.3
12 483 365.3 381.0 31.8 327.2 55.6
14 533 400.1 412.8 35.1 359.2 57.2
16 597 457.2 469.9 36.6 410.5 63.5
18 635 505.0 533.4 39.6 461.8 68.3
20 699 558.8 584.2 42.9 513.1 73.2
24 813 663.4 692.2 47.8 616.0 82.6
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 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

Slip-On Flanges
Class 300LB

Slip-On Flanges Class 300LB Slip-On 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
slip on flanges class 300lb
Size
inch
D
mm
X
mm
G
mm
t
mm
B2
mm
T2
mm
1/2 95 38.1 35.1 14.2 22.4 22.4
3/4 117 47.8 42.9 15.7 27.7 25.4
1 124 53.8 50.8 17.5 34.5 26.9
133 63.5 63.5 19.1 43.2 26.9
155 69.9 73.2 20.6 49.5 30.2
2 165 84.1 91.9 22.4 62.0 33.3
191 100.1 104.6 25.4 74.7 38.1
3 210 117.3 127.0 28.4 90.7 42.9
229 133.4 139.7 30.2 103.4 44.5
4 254 146.1 157.2 31.8 116.1 47.8
5 279 177.8 185.7 35.1 143.8 50.8
6 318 206.2 215.9 36.6 170.7 52.3
8 381 260.4 269.7 41.1 221.5 62.0
10 445 320.5 323.9 47.8 276.4 66.5
12 521 374.7 381.0 50.8 327.2 73.2
14 584 425.5 412.8 63.8 359.2 76.2
16 648 482.6 469.9 57.2 410.5 82.6
18 711 533.4 533.4 60.5 461.8 88.9
20 775 587.2 584.2 63.5 513.1 95.3
24 914 701.5 692.2 69.9 616.0 106.4
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

Slip-On Flanges
Class 600LB

Slip-On Flanges Class 600LB Slip-On 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
slip on flanges class 600lb
Size
inch
D
mm
X
mm
G
mm
t
mm
B2
mm
T2
mm
1/2 95 38.1 35.1 14.2 22.4 22.4
3/4 117 47.8 42.9 15.7 27.7 25.4
1 124 53.8 50.8 17.5 34.5 26.9
133 63.5 63.5 20.6 43.2 28.4
155 69.9 73.2 22.4 49.5 31.8
2 165 84.1 91.9 25.4 62.0 36.6
191 100.1 104.6 28.4 74.7 41.1
3 210 117.3 127.0 31.8 90.7 46.0
229 133.4 139.7 35.1 103.4 49.3
4 273 152.4 157.2 38.1 116.1 53.8
5 330 189.0 185.7 44.5 143.8 60.5
6 356 222.3 215.9 47.8 170.7 66.5
8 419 273.1 269.7 55.6 221.5 76.2
10 508 342.9 323.9 63.5 276.4 85.9
12 559 400.1 381.0 66.5 327.2 91.9
14 603 431.8 412.8 69.9 359.2 93.7
16 686 495.3 469.9 76.2 410.5 106.4
18 743 546.1 533.4 82.6 461.8 117.3
20 813 609.6 584.2 88.9 513.1 127.0
24 940 717.6 692.2 101.6 616.0 139.7
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 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

Slip-On Flanges
Class 900LB

Slip-On Flanges Class 900LB Slip-On 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
slip on flanges class 900lb
Size
inch
D
mm
X
mm
G
mm
t
mm
B2
mm
T2
mm
1/2 121 38.1 35.1 22.4 22.4 31.8
3/4 130 44.5 42.9 25.4 27.7 35.1
1 149 52.3 50.8 28.4 34.5 41.1
159 63.5 63.5 28.4 43.2 41.1
178 69.9 73.2 31.8 49.5 44.5
2 216 104.6 91.9 38.1 62.0 57.2
244 124.0 104.6 41.1 74.7 63.5
3 241 127.0 127.0 38.1 90.7 53.8
4 292 158.8 157.2 44.5 116.1 69.9
5 349 190.5 185.7 50.8 143.8 79.2
6 381 235.0 215.9 55.6 170.7 85.9
8 470 298.5 269.7 63.5 221.5 101.6
10 546 368.3 323.9 69.9 276.4 108.0
12 610 419.1 381.0 79.2 327.2 117.3
14 641 450.9 412.8 85.9 359.2 130.0
16 705 508.0 469.9 88.9 410.5 133.4
18 787 565.2 533.4 101.6 461.8 152.4
20 857 622.3 584.2 108.0 513.1 158.8
24 1041 749.3 692.2 139.7 616.0 203.2
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