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) | 21/16 | 52.4 | 61/2 | 165 | 15/16 | 33.3 | 31/4 | 82.55 | 15/32 | 11.91 | 23 | 5 | 127.0 | 8 | 5/8 | 41/2 | 108 |
29/16 | 65.1 | 71/2 | 191 | 17/16 | 36.5 | 4 | 101.60 | 15/32 | 11.91 | 26 | 57/8 | 149.2 | 8 | 3/4 | 5 | 127 | |
31/8 | 79.4 | 81/4 | 210 | 19/16 | 39.7 | 47/8 | 123.83 | 15/32 | 11.91 | 31 | 65/8 | 168.3 | 8 | 3/4 | 51/4 | 133 | |
41/16 | 103.2 | 103/4 | 273 | 113/16 | 46.0 | 57/8 | 149.23 | 15/32 | 11.91 | 37 | 81/2 | 215.9 | 8 | 7/8 | 6 | 152 | |
51/8 | 130.0 | 13 | 330 | 21/16 | 52.4 | 71/8 | 180.98 | 15/32 | 11.91 | 41 | 101/2 | 266.7 | 8 | 1 | 63/4 | 165 | |
71/16 | 179.4 | 14 | 356 | 23/16 | 55.6 | 85/16 | 211.14 | 15/32 | 11.91 | 45 | 111/2 | 292.1 | 12 | 1 | 7 | 178 | |
9 | 228.6 | 161/2 | 419 | 21/2 | 63.5 | 105/8 | 269.88 | 15/32 | 11.91 | 49 | 133/4 | 349.3 | 12 | 11/8 | 8 | 203 | |
11 | 279.4 | 20 | 508 | 213/16 | 71.4 | 123/4 | 323.85 | 15/32 | 11.91 | 53 | 17 | 431.8 | 16 | 11/4 | 83/4 | 222 | |
135/8 | 346.1 | 22 | 559 | 215/16 | 74.6 | 15 | 381.00 | 15/32 | 11.91 | 57 | 191/4 | 489.0 | 20 | 11/4 | 9 | 229 | |
163/4 | 425.5 | 27 | 686 | 35/16 | 84.1 | 181/2 | 469.90 | 15/32 | 11.91 | 65 | 233/4 | 603.3 | 20 | 11/2 | 101/4 | 260 | |
211/4 | 539.8 | 32 | 813 | 37/8 | 98.4 | 23 | 584.20 | 17/32 | 13.49 | 73 | 281/2 | 723.9 | 24 | 15/8 | 113/4 | 298 | |
3000 psi 20.7 MPa (R or RX Gasket) | 21/16 | 52.4 | 81/2 | 216 | 113/16 | 46.0 | 33/4 | 95.25 | 15/32 | 11.91 | 24 | 61/2 | 165.1 | 8 | 7/8 | 6 | 152 |
29/16 | 65.1 | 95/8 | 244 | 115/16 | 49.2 | 41/4 | 107.95 | 15/32 | 11.91 | 27 | 71/2 | 190.5 | 8 | 1 | 61/2 | 165 | |
31/8 | 79.4 | 91/2 | 241 | 113/16 | 46.0 | 47/8 | 123.83 | 15/32 | 11.91 | 31 | 71/2 | 190.5 | 8 | 7/8 | 6 | 152 | |
41/16 | 103.2 | 111/2 | 292 | 21/16 | 52.4 | 57/8 | 149.23 | 15/32 | 11.91 | 37 | 91/4 | 235.0 | 8 | 11/8 | 7 | 178 | |
51/8 | 130.0 | 133/4 | 350 | 25/16 | 58.8 | 71/8 | 180.98 | 15/32 | 11.91 | 41 | 11 | 279.4 | 8 | 11/4 | 73/4 | 195 | |
71/16 | 179.4 | 15 | 381 | 21/2 | 63.5 | 85/16 | 211.14 | 15/32 | 11.91 | 45 | 121/2 | 317.5 | 12 | 11/8 | 8 | 203 | |
9 | 228.6 | 181/2 | 470 | 213/16 | 71.4 | 105/8 | 269.88 | 15/32 | 11.91 | 49 | 151/2 | 393.7 | 12 | 13/8 | 9 | 229 | |
11 | 279.4 | 211/2 | 546 | 31/16 | 77.8 | 123/4 | 323.85 | 15/32 | 11.91 | 53 | 181/2 | 469.9 | 16 | 13/8 | 91/2 | 241 | |
135/8 | 346.1 | 24 | 610 | 37/16 | 87.3 | 15 | 381.00 | 15/32 | 11.91 | 57 | 21 | 533.4 | 20 | 13/8 | 101/4 | 260 | |
163/4 | 425.5 | 273/4 | 705 | 315/16 | 100.0 | 181/2 | 469.90 | 21/32 | 16.67 | 66 | 241/4 | 616.0 | 20 | 15/8 | 113/4 | 298 | |
203/4 | 527.1 | 333/4 | 857 | 43/4 | 120.7 | 23 | 584.20 | 25/32 | 19.84 | 74 | 291/2 | 749.3 | 20 | 2 | 141/2 | 368 | |
5000 psi 34.5 MPa (R or RX Gasket) | 21/16 | 52.4 | 81/2 | 216 | 113/16 | 46.0 | 33/4 | 95.25 | 15/32 | 11.91 | 24 | 61/2 | 165.1 | 8 | 7/8 | 6 | 152 |
29/16 | 65.1 | 95/8 | 244 | 115/16 | 49.2 | 41/4 | 107.95 | 15/32 | 11.91 | 27 | 71/2 | 190.5 | 8 | 1 | 61/2 | 165 | |
31/8 | 79.4 | 101/2 | 267 | 23/16 | 55.6 | 53/8 | 136.53 | 15/32 | 11.91 | 35 | 8 | 203.2 | 8 | 11/8 | 71/4 | 184 | |
41/16 | 103.2 | 121/4 | 311 | 27/16 | 61.9 | 63/8 | 161.93 | 15/32 | 11.91 | 39 | 91/2 | 241.3 | 8 | 11/4 | 8 | 203 | |
51/8 | 130.0 | 143/4 | 375 | 33/16 | 81.0 | 75/8 | 193.68 | 15/32 | 11.91 | 44 | 111/2 | 292.1 | 8 | 11/2 | 10 | 255 | |
71/16 | 179.4 | 151/2 | 394 | 35/8 | 92.1 | 85/16 | 211.14 | 17/32 | 13.49 | 46 | 121/2 | 317.5 | 12 | 13/8 | 103/4 | 273 | |
9 | 228.6 | 19 | 483 | 41/16 | 103.2 | 105/8 | 269.88 | 21/32 | 16.67 | 50 | 151/2 | 393.7 | 12 | 15/8 | 12 | 305 | |
11 | 279.4 | 23 | 584 | 411/16 | 119.1 | 123/4 | 323.85 | 21/32 | 16.67 | 54 | 19 | 482.6 | 12 | 17/8 | 133/4 | 349 |
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 | ||||
5000 psi 34.5 MPa (BX Gasket) | 135/8 | 346.1 | 261/2 | 673 | 47/16 | 112.7 | 16.063 | 408.00 | 0.786 | 19.96 | BX-160 | 231/4 | 590.6 | 16 | 15/8 | 121/2 | 318 |
163/4 | 425.5 | 303/8 | 772 | 51/8 | 130.2 | 18.832 | 478.33 | 0.705 | 17.91 | BX-162 | 265/8 | 676.3 | 16 | 17/8 | 141/2 | 368 | |
183/4 | 476.3 | 355/8 | 905 | 617/32 | 165.9 | 22.185 | 563.50 | 1.006 | 25.55 | BX-163 | 315/8 | 803.3 | 20 | 2 | 171/2 | 445 | |
211/4 | 539.8 | 39 | 991 | 71/8 | 181.0 | 24.904 | 632.56 | 1.071 | 27.20 | BX-165 | 347/8 | 885.8 | 24 | 2 | 183/4 | 476 | |
10,000 psi 69.0 MPa (BX Gasket) | 113/16 | 46.0 | 73/8 | 187 | 121/32 | 42.1 | 3.062 | 77.77 | 0.466 | 11.84 | BX-151 | 53/4 | 146.1 | 8 | 3/4 | 5 | 127 |
21/16 | 52.4 | 77/8 | 200 | 147/64 | 44.1 | 3.395 | 86.23 | 0.498 | 12.65 | BX-152 | 61/4 | 158.8 | 8 | 3/4 | 51/4 | 133 | |
29/16 | 65.1 | 91/8 | 232 | 21/64 | 51.2 | 4.046 | 102.77 | 0.554 | 14.07 | BX-153 | 71/4 | 184.2 | 8 | 7/8 | 6 | 152 | |
31/16 | 77.8 | 105/8 | 270 | 219/64 | 58.3 | 4.685 | 119.00 | 0.606 | 15.39 | BX-154 | 81/2 | 215.9 | 8 | 1 | 63/4 | 171 | |
41/16 | 103.2 | 127/16 | 316 | 249/64 | 70.2 | 5.930 | 150.62 | 0.698 | 17.73 | BX-155 | 103/16 | 258.8 | 8 | 11/8 | 8 | 203 | |
51/8 | 130.2 | 141/16 | 357 | 31/8 | 79.4 | 6.955 | 176.66 | 0.666 | 16.92 | BX-169 | 1113/16 | 300.0 | 12 | 11/8 | 83/4 | 222 | |
71/16 | 179.4 | 187/8 | 479 | 41/16 | 103.2 | 9.521 | 241.83 | 0.921 | 23.39 | BX-156 | 157/8 | 403.2 | 12 | 11/2 | 111/4 | 286 | |
9 | 228.6 | 213/4 | 552 | 47/8 | 123.8 | 11.774 | 299.06 | 1.039 | 26.39 | BX-157 | 183/4 | 476.3 | 16 | 11/2 | 13 | 330 | |
11 | 279.4 | 253/4 | 654 | 59/16 | 141.3 | 14.064 | 357.23 | 1.149 | 29.18 | BX-158 | 221/4 | 565.2 | 16 | 13/4 | 15 | 381 | |
135/8 | 346.1 | 301/4 | 768 | 65/8 | 168.3 | 17.033 | 432.64 | 1.279 | 32.49 | BX-159 | 261/2 | 673.1 | 20 | 17/8 | 171/4 | 438 | |
163/4 | 425.5 | 345/16 | 872 | 65/8 | 168.3 | 18.832 | 478.33 | 0.705 | 17.91 | BX-162 | 309/16 | 776.3 | 24 | 17/8 | 171/2 | 445 | |
183/4 | 476.3 | 4015/16 | 1040 | 825/32 | 223.0 | 22.752 | 577.90 | 1.290 | 32.77 | BX-164 | 367/16 | 925.5 | 24 | 21/4 | 221/2 | 572 | |
211/4 | 539.8 | 45 | 1143 | 91/2 | 241.3 | 25.507 | 647.88 | 1.373 | 34.87 | BX-166 | 401/4 | 1022.4 | 24 | 21/2 | 241/2 | 622 | |
15,000 psi 103.5 MPa (BX Gasket) | 113/16 | 46.0 | 83/16 | 208 | 125/32 | 45.2 | 3.062 | 77.77 | 0.466 | 11.84 | BX-151 | 65/16 | 160.3 | 8 | 7/8 | 51/2 | 140 |
21/16 | 52.4 | 83/4 | 222 | 2 | 50.8 | 3.395 | 86.23 | 0.498 | 12.65 | BX-152 | 67/8 | 174.6 | 8 | 7/8 | 6 | 152 | |
29/16 | 65.1 | 10 | 254 | 21/4 | 57.2 | 4.046 | 102.77 | 0.554 | 14.07 | BX-153 | 77/8 | 200.0 | 8 | 1 | 63/4 | 171 | |
31/16 | 77.8 | 115/16 | 287 | 217/32 | 64.3 | 4.685 | 119.00 | 0.606 | 15.39 | BX-154 | 91/16 | 230.2 | 8 | 11/8 | 71/2 | 191 | |
41/16 | 103.2 | 143/16 | 360 | 33/32 | 78.6 | 5.930 | 150.62 | 0.698 | 17.73 | BX-155 | 117/16 | 290.5 | 8 | 13/8 | 91/4 | 235 | |
71/16 | 179.4 | 197/8 | 505 | 411/16 | 119.1 | 9.521 | 241.83 | 0.921 | 23.39 | BX-156 | 167/8 | 428.6 | 16 | 11/2 | 123/4 | 324 | |
9 | 228.6 | 251/2 | 648 | 53/4 | 146.1 | 11.774 | 299.06 | 1.039 | 26.39 | BX-157 | 213/4 | 552.5 | 16 | 17/8 | 153/4 | 400 | |
11 | 279.4 | 32 | 813 | 73/8 | 187.3 | 14.064 | 357.23 | 1.149 | 29.18 | BX-158 | 28 | 711.2 | 20 | 2 | 191/4 | 489 | |
135/8 | 346.1 | 347/8 | 886 | 81/16 | 204.8 | 17.033 | 432.60 | 1.279 | 32.50 | BX-159 | 307/8 | 784.2 | 20 | 21/4 | 211/4 | 540 | |
183/4 | 476.3 | 453/4 | 1162 | 101/16 | 255.6 | 22.752 | 577.90 | 1.290 | 32.77 | BX-164 | 4 | 1016.0 | 20 | 3 | 263/4 | 679 | |
20,000 psi 138.0 MPa (BX Gasket) | 113/16 | 46.0 | 101/8 | 257 | 21/2 | 63.5 | 3.062 | 77.77 | 0.466 | 11.84 | BX-151 | 8 | 203.2 | 8 | 1 | 71/2 | 191 |
21/16 | 52.4 | 115/16 | 287 | 213/16 | 71.4 | 3.395 | 86.23 | 0.498 | 12.65 | BX-152 | 91/16 | 230.2 | 8 | 11/8 | 81/4 | 210 | |
29/16 | 65.1 | 1213/16 | 325 | 31/8 | 79.4 | 4.046 | 102.77 | 0.554 | 14.07 | BX-153 | 105/16 | 261.9 | 8 | 11/4 | 91/4 | 235 | |
31/16 | 77.8 | 141/16 | 357 | 33/8 | 85.7 | 4.685 | 119.00 | 0.606 | 15.39 | BX-154 | 115/16 | 287.3 | 8 | 13/8 | 10 | 254 | |
41/16 | 103.2 | 179/16 | 446 | 43/16 | 106.4 | 5.930 | 150.62 | 0.698 | 17.73 | BX-155 | 141/6 | 357.2 | 8 | 13/4 | 121/4 | 311 | |
71/16 | 179.4 | 2513/16 | 656 | 61/2 | 165.1 | 9.521 | 241.83 | 0.921 | 23.39 | BX-156 | 2113/16 | 554.0 | 16 | 2 | 171/2 | 445 | |
9 | 228.6 | 3111/16 | 805 | 81/16 | 204.8 | 11.774 | 399.06 | 1.039 | 26.39 | BX-157 | 27 | 685.8 | 16 | 21/2 | 223/8 | 568 | |
11 | 279.4 | 343/4 | 883 | 813/16 | 223.8 | 14.064 | 357.23 | 1.149 | 29.18 | BX-158 | 291/2 | 749.3 | 16 | 23/4 | 233/4 | 603 | |
135/8 | 346.1 | 353/4 | 1162 | 111/2 | 292.1 | 17.033 | 432.64 | 1.279 | 32.49 | BX-159 | 40 | 1016.0 | 20 | 31/8 | 30 | 762 |