API Flanges

API Flange and Joint Dimensions



API
Pressure
Rating		 Flange Ring Groove Bolt Studs
Nominal
Size		 Outside
Diameter		 T P E
Width		 Ring
No		 D Bolt
Circle		 No. Size Stud
Length
in mm in mm in mm in mm in mm in mm in mm
2000 psi
13.8 MPa
(R or RX
Gasket)		 2-1/16 52.4 6-1/2 165 1-5/16 33.3 3-1/4 82.55 15/32 11.91 23 5 127.0 8 5/8 4-1/2 108
2-9/16 65.1 7-1/2 191 1-7/16 36.5 4 101.60 15/32 11.91 26 5-7/8 149.2 8 3/4 5 127
3-1/8 79.4 8-1/4 210 1-9/16 39.7 4-7/8 123.83 15/32 11.91 31 6-5/8 168.3 8 3/4 5-1/4 133
4-1/16 103.2 10-3/4 273 1-13/16 46.0 5-7/8 149.23 15/32 11.91 37 8-1/2 215.9 8 7/8 6 152
5-1/8 130.0 13 330 2-1/16 52.4 7-1/8 180.98 15/32 11.91 41 10-1/2 266.7 8 1 6-3/4 165
7-1/16 179.4 14 356 2-3/16 55.6 8-5/16 211.14 15/32 11.91 45 11-1/2 292.1 12 1 7 178
9 228.6 16-1/2 419 2-1/2 63.5 10-5/8 269.88 15/32 11.91 49 13-3/4 349.3 12 1-1/8 8 203
11 279.4 20 508 2-13/16 71.4 12-3/4 323.85 15/32 11.91 53 17 431.8 16 1-1/4 8-3/4 222
13-5/8 346.1 22 559 2-15/16 74.6 15 381.00 15/32 11.91 57 19-1/4 489.0 20 1-1/4 9 229
16-3/4 425.5 27 686 3-5/16 84.1 18-1/2 469.90 15/32 11.91 65 23-3/4 603.3 20 1-1/2 10-1/4 260
21-1/4 539.8 32 813 3-7/8 98.4 23 584.20 17/32 13.49 73 28-1/2 723.9 24 1-5/8 11-3/4 298
3000 psi
20.7 MPa
(R or RX
Gasket)		 2-1/16 52.4 8-1/2 216 1-13/16 46.0 3-3/4 95.25 15/32 11.91 24 6-1/2 165.1 8 7/8 6 152
2-9/16 65.1 9-5/8 244 1-15/16 49.2 4-1/4 107.95 15/32 11.91 27 7-1/2 190.5 8 1 6-1/2 165
3-1/8 79.4 9-1/2 241 1-13/16 46.0 4-7/8 123.83 15/32 11.91 31 7-1/2 190.5 8 7/8 6 152
4-1/16 103.2 11-1/2 292 2-1/16 52.4 5-7/8 149.23 15/32 11.91 37 9-1/4 235.0 8 1-1/8 7 178
5-1/8 130.0 13-1/4 350 2-5/16 58.8 7-1/8 180.98 15/32 11.91 41 11 279.4 8 1-1/4 7-3/4 195
7-1/16 179.4 15 381 2-1/2 63.5 8-5/16 211.14 15/32 11.91 45 12-1/2 317.5 12 1-1/8 8 203
9 228.6 18-1/2 470 2-13/16 71.4 10-5/8 269.88 15/32 11.91 49 15-1/2 393.7 12 1-3/8 9 229
11 279.4 21-1/2 546 3-1/16 77.8 12-3/4 323.85 15/32 11.91 53 18-1/2 469.9 16 1-3/8 9-1/2 241
13-5/8 346.1 24 610 3-7/16 87.3 15 381.00 15/32 11.91 57 21 533.4 20 1-3/8 10-1/4 260
16-3/4 425.5 27-3/4 705 3-15/16 100.0 18-1/2 469.90 21/32 16.67 66 24-1/4 616.0 20 1-5/8 11-3/4 298
20-3/4 527.1 33-3/4 857 4-3/4 120.7 23 584.20 25/32 19.84 74 29-1/2 749.3 20 2 14-1/2 368
5000 psi
34.5 MPa
(R or RX
Gasket)		 2-1/16 52.4 8-1/2 216 1-13/16 46.0 3-3/4 95.25 15/32 11.91 24 6-1/2 165.1 8 7/8 6 152
2-9/16 65.1 9-5/8 244 1-15/16 49.2 4-1/4 107.95 15/32 11.91 27 7-1/2 190.5 8 1 6-1/2 165
3-1/8 79.4 10-1/2 267 2-3/16 55.6 5-3/8 136.53 15/32 11.91 35 8 203.2 8 1-1/8 7-1/4 184
4-1/16 103.2 12-1/4 311 2-7/16 61.9 6-3/8 161.93 15/32 11.91 39 9-1/2 241.3 8 1-1/4 8 203
5-1/8 130.0 14-3/4 375 3-3/16 81.0 7-5/8 193.68 15/32 11.91 44 11-1/2 292.1 8 1-1/2 10 255
7-1/16 179.4 15-1/2 394 3-5/8 92.1 8-5/16 211.14 17/32 13.49 46 12-1/2 317.5 12 1-3/8 10-3/4 273
9 228.6 19 483 4-1/16 103.2 10-5/8 269.88 21/32 16.67 50 15-1/2 393.7 12 1-5/8 12 305
11 279.4 23 584 4-11/16 119.1 12-3/4 323.85 21/32 16.67 54 19 482.6 12 1-7/8 13-3/4 349

API
Pressure
Rating		 Flange Ring Groove Bolt Studs
Nominal
Size		 A Outside
Diameter		 T G E
Width		 Ring
No		 D Bolt
Circle		 No. Size Stud
Length
in mm in mm in mm in mm in mm in mm in mm
5000 psi
34.5 MPa
(BX Gasket)		 13-5/8 346.1 26-1/2 673 4-7/16 112.7 16.063 408.00 0.786 19.96 BX-160 23-1/4 590.6 16 1-5/8 12-1/4 318
16-3/4 425.5 30-3/8 772 5-1/8 130.2 18.832 478.33 0.705 17.91 BX-162 26-5/8 676.3 16 1-7/8 14-1/2 368
18-3/4 476.3 35-5/8 905 6-17/32 165.9 22.185 563.50 1.006 25.55 BX-163 31-5/8 803.3 20 2 17-1/2 445
21-1/4 539.8 39 991 7-1/8 181.0 24.904 632.56 1.071 27.20 BX-165 34-7/8 885.8 24 2 18-3/4 476
10,000 psi
69.0 MPa
(BX Gasket)		 1-13/16 46.0 7-3/8 187 1-21/32 42.1 3.062 77.77 0.466 11.84 BX-151 5-3/4 146.1 8 3/4 5 127
2-1/16 52.4 7-7/8 200 1-47/64 44.1 3.395 86.23 0.498 12.65 BX-152 6-1/4 158.8 8 3/4 5-1/4 133
2-9/16 65.1 9-1/8 232 2-1/64 51.2 4.046 102.77 0.554 14.07 BX-153 7-1/4 184.2 8 7/8 6 152
3-1/16 77.8 10-5/8 270 2-19/64 58.3 4.685 119.00 0.606 15.39 BX-154 8-1/2 215.9 8 1 6-3/4 171
4-1/16 103.2 12-7/16 316 2-49/64 70.2 5.930 150.62 0.698 17.73 BX-155 10-3/16 258.8 8 1-1/8 8 203
5-1/8 130.2 14-1/16 357 3-1/8 79.4 6.955 176.66 0.666 16.92 BX-169 11-13/16 300.0 12 1-1/8 8-3/4 222
7-1/16 179.4 18-7/8 479 4-1/16 103.2 9.521 241.83 0.921 23.39 BX-156 15-7/8 403.2 12 1-1/2 11-1/4 286
9 228.6 21-3/4 552 4-7/8 123.8 11.774 299.06 1.039 26.39 BX-157 18-3/4 476.3 16 1-1/2 13 330
11 279.4 25-3/4 654 5-9/16 141.3 14.064 357.23 1.149 29.18 BX-158 22-1/4 565.2 16 1-3/4 15 381
13-5/8 346.1 30-1/4 768 6-5/8 168.3 17.033 432.64 1.279 32.49 BX-159 26-1/2 673.1 20 1-7/8 17-1/4 438
16-3/4 425.5 34-5/16 872 6-5/8 168.3 18.832 478.33 0.705 17.91 BX-162 30-9/16 776.3 24 1-7/8 17-1/2 445
18-3/4 476.3 40-15/16 1040 8-25/32 223.0 22.752 577.90 1.290 32.77 BX-164 36-7/16 925.5 24 2-1/4 22-1/2 572
21-1/4 539.8 45 1143 9-1/2 241.3 25.507 6647.88 1.373 34.87 BX-166 40-1/4 1022.4 24 2-1/2 24-1/2 622
15,000 psi
103.5 MPa
(BX Gasket)		 1-13/16 46.0 8-3/16 208 1-25/32 45.2 3.062 77.77 0.466 11.84 BX-151 6-5/16 160.3 8 7/8 5-1/2 140
2-1/16 52.4 8-3/4 222 2 50.8 3.395 86.23 0.498 12.65 BX-152 6-7/8 174.6 8 7/8 6 152
2-9/16 65.1 10 254 2-1/4 57.2 4.046 102.77 0.554 14.07 BX-153 7-7/8 200.0 8 1 6-3/4 171
3-1/16 77.8 11-5/16 287 2-17/32 64.3 4.685 119.00 0.606 15.39 BX-154 9-1/16 230.2 8 1-1/8 7-1/2 191
4-1/16 103.2 14-3/16 360 3-3/32 78.6 5.930 150.62 0.698 17.73 BX-155 11-7/16 290.5 8 1-3/8 9-1/4 235
7-1/16 179.4 19-7/8 505 4-11/16 119.1 9.521 241.83 0.921 23.39 BX-156 16-7/8 428.6 16 1-1/2 12-3/4 324
9 228.6 25-1/2 648 5-3/4 146.1 11.774 299.06 1.039 26.39 BX-157 21-3/4 552.5 16 1-7/8 15-3/4 400
11 279.4 32 813 7-3/8 187.3 14.064 357.23 1.149 29.18 BX-158 28 711.2 20 2 19-1/4 489
13-5/8 346.1 34-7/8 886 8-1/16 204.8 17.033 432.64 1.279 32.49 BX-159 30-7/8 784.2 20 2-1/4 21-1/4 540
18-3/4 476.3 45-3/4 1162 10-1/16 255.6 22.752 577.90 1.290 32.77 BX-164 40 1016.0 20 3 26-3/4 679
20,000 psi
138.0 MPa
(BX Gasket)		 1-13/16 46.0 10-1/8 257 2-1/22 63.5 3.062 77.77 0.466 11.84 BX-151 8 203.2 8 1 7-1/2 191
2-1/16 52.4 11-5/16 287 2-13/16 71.4 3.395 86.23 0.498 12.65 BX-152 9-1/16 230.2 8 1-1/8 8-1/4 210
2-9/16 65.1 12-13/16 325 3-1/8 79.4 4.046 102.77 0.554 14.07 BX-153 10-5/16 261.9 8 1-1/4 9-1/4 235
3-1/16 77.8 14-1/16 357 3-3/8 85.7 4.685 119.00 0.606 15.39 BX-154 11-5/16 287.3 8 1-3/8 10 254
4-1/16 103.2 17-9/16 446 4-3/16 106.4 5.930 150.62 0.698 17.73 BX-155 14-1/16 357.2 8 1-3/4 12-1/4 311
7-1/16 179.4 25-16/16 656 6-1/2 165.1 9.521 241.83 0.921 23.39 BX-156 21-13/16 554.0 16 2 17-1/2 445
9 228.6 31-11/16 805 8-1/16 204.8 11.774 299.06 1.039 26.39 BX-157 27 685.8 16 2-1/2 22-3/8 568
11 279.4 34-3/4 883 8-13/16 223.8 14.064 357.23 1.149 29.18 BX-158 29-1/2 749.3 16 2-3/4 23-3/4 603
13-5/8 346.1 35-3/4 1162 11-1/2 292.1 17.033 432.64 1.279 32.49 BX-159 40 1016.0 20 3-1/8 30 762

Home News Products Swages Oil Country Couplings Spec Blinds Ring Gaskets Needle Valves Pressure Gauges Hammer Unions Swivel Joints API Flanges Chokes Catalogues

Send mail to Webmaster with questions or comments about this web site.
Copyright © 2024 Vengeance Oilfield Products Inc