Welding Neck Flanges, as the name suggests, has a conical neck which is butt welded to connecting pipe. As Radiography is required for all welds in critical services, welding neck flanges are majorly used in such locations as they are buttwelded to pipes and it is quite easier to do radiography of buttwelds.
The thickness of the welding neck flanges needs to be specified for procurement which is generally same as the pipe thickness of the same size. Welding neck flanges are more expensive and used in high temperature, flammable, toxic etc. services.
150# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 90 | 9.6 | 30 | 21.3 | 46 | 15.8 |
| 3/4 | 100 | 11.2 | 38 | 26.7 | 51 | 20.9 |
| 1 | 110 | 12.7 | 49 | 33.4 | 54 | 26.6 |
| 1-1/4 | 115 | 14.3 | 59 | 42.2 | 56 | 35.1 |
| 1-1/2 | 125 | 15.9 | 65 | 48.3 | 60 | 40.9 |
| 2 | 150 | 17.5 | 78 | 60.3 | 62 | 52.5 |
| 2-1/2 | 180 | 20.7 | 90 | 73 | 68 | 62.7 |
| 3 | 190 | 22.3 | 108 | 88.9 | 68 | 77.9 |
| 3-1/2 | 215 | 22.3 | 122 | 101.6 | 70 | 90.1 |
| 4 | 230 | 22.3 | 135 | 114.3 | 75 | 102.3 |
| 5 | 255 | 22.3 | 164 | 141.3 | 87 | 128.2 |
| 6 | 280 | 23.9 | 192 | 168.3 | 87 | 154.1 |
| 8 | 345 | 27 | 246 | 219.1 | 100 | 202.7 |
| 10 | 405 | 28.6 | 305 | 273 | 100 | 254.6 |
| 12 | 485 | 30.2 | 365 | 323.8 | 113 | 304.8 |
| 14 | 535 | 33.4 | 400 | 355.6 | 125 | BY P |
| 16 | 595 | 35 | 457 | 406.4 | 125 | BY P |
| 18 | 635 | 38.1 | 505 | 457 | 138 | BY P |
| 20 | 700 | 41.3 | 559 | 508 | 143 | BY P |
| 24 | 815 | 46.1 | 663 | 610 | 151 | BY P |
150# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 60.3 | 5/8 | 4 | 1/2 | 55 | NA | 50 |
| 3/4 | 69.9 | 5/8 | 4 | 1/2 | 65 | NA | 50 |
| 1 | 79.4 | 5/8 | 4 | 1/2 | 65 | 75 | 55 |
| 1-1/4 | 88.9 | 5/8 | 4 | 1/2 | 70 | 85 | 55 |
| 1-1/2 | 98.4 | 5/8 | 4 | 1/2 | 70 | 85 | 65 |
| 2 | 120.7 | 3/4 | 4 | 5/8 | 85 | 95 | 70 |
| 2-1/2 | 139.7 | 3/4 | 4 | 5/8 | 90 | 100 | 75 |
| 3 | 152.4 | 3/4 | 4 | 5/8 | 90 | 100 | 75 |
| 3-1/2 | 177.8 | 3/4 | 8 | 5/8 | 90 | 100 | 75 |
| 4 | 190.5 | 3/4 | 8 | 5/8 | 90 | 100 | 75 |
| 5 | 215.9 | 7/8 | 8 | 3/4 | 95 | 110 | 85 |
| 6 | 241.3 | 7/8 | 8 | 3/4 | 100 | 115 | 85 |
| 8 | 298.5 | 7/8 | 8 | 3/4 | 110 | 120 | 90 |
| 10 | 362.0 | 1 | 12 | 7/8 | 115 | 125 | 100 |
| 12 | 431.8 | 1 | 12 | 7/8 | 120 | 135 | 100 |
| 14 | 476.3 | 1-1/8 | 12 | 1 | 135 | 145 | 115 |
| 16 | 539.8 | 1-1/8 | 16 | 1 | 135 | 145 | 115 |
| 18 | 577.9 | 1-1/4 | 16 | 1-1/8 | 145 | 160 | 125 |
| 20 | 635.0 | 1-1/4 | 20 | 1-1/8 | 160 | 170 | 140 |
| 24 | 749.3 | 1-3/8 | 20 | 1-1/4 | 170 | 185 | 150 |
300# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 95 | 12.7 | 38 | 21.3 | 51 | 15.8 |
| 3/4 | 115 | 14.3 | 48 | 26.7 | 56 | 20.9 |
| 1 | 125 | 15.9 | 54 | 33.4 | 60 | 26.6 |
| 1-1/4 | 135 | 17.5 | 64 | 42.2 | 64 | 35.1 |
| 1-1/2 | 155 | 19.1 | 70 | 48.3 | 67 | 40.9 |
| 2 | 165 | 20.7 | 84 | 60.3 | 68 | 52.5 |
| 2-1/2 | 190 | 23.9 | 100 | 73 | 75 | 62.7 |
| 3 | 210 | 27 | 117 | 88.9 | 78 | 77.9 |
| 3-1/2 | 230 | 28.6 | 133 | 101.6 | 79 | 90.1 |
| 4 | 255 | 30.2 | 146 | 114.3 | 84 | 102.3 |
| 5 | 280 | 33.4 | 178 | 141.3 | 97 | 128.2 |
| 6 | 320 | 35 | 206 | 168.3 | 97 | 154.1 |
| 8 | 380 | 39.7 | 260 | 219.1 | 110 | 202.7 |
| 10 | 445 | 46.1 | 321 | 273 | 116 | 254.6 |
| 12 | 520 | 49.3 | 375 | 323.8 | 129 | 304.8 |
| 14 | 585 | 52.4 | 425 | 355.6 | 141 | BY P |
| 16 | 650 | 55.6 | 483 | 406.4 | 144 | BY P |
| 18 | 710 | 58.8 | 533 | 457 | 157 | BY P |
| 20 | 775 | 62 | 587 | 508 | 160 | BY P |
| 24 | 915 | 68.3 | 702 | 610 | 167 | BY P |
300# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 66.7 | 5/8 | 4 | 1/2 | 65 | 75 | 55 |
| 3/4 | 82.6 | 3/4 | 4 | 5/8 | 75 | 90 | 65 |
| 1 | 88.9 | 3/4 | 4 | 5/8 | 75 | 90 | 65 |
| 1-1/4 | 98.4 | 3/4 | 4 | 5/8 | 85 | 95 | 70 |
| 1-1/2 | 114.3 | 7/8 | 4 | 3/4 | 90 | 100 | 75 |
| 2 | 127.0 | 3/4 | 8 | 5/8 | 90 | 100 | 75 |
| 2-1/2 | 149.2 | 7/8 | 8 | 3/4 | 100 | 115 | 85 |
| 3 | 168.3 | 7/8 | 8 | 3/4 | 110 | 120 | 90 |
| 3-1/2 | 184.2 | 7/8 | 8 | 3/4 | 110 | 125 | 95 |
| 4 | 200.0 | 7/8 | 8 | 3/4 | 115 | 125 | 95 |
| 5 | 235.0 | 7/8 | 8 | 3/4 | 120 | 135 | 110 |
| 6 | 269.9 | 7/8 | 12 | 3/4 | 120 | 140 | 110 |
| 8 | 330.2 | 1 | 12 | 7/8 | 140 | 150 | 120 |
| 10 | 387.4 | 1-1/8 | 16 | 1 | 160 | 170 | 140 |
| 12 | 450.8 | 1-1/4 | 16 | 1-1/8 | 170 | 185 | 145 |
| 14 | 514.4 | 1-1/4 | 20 | 1-1/8 | 180 | 190 | 160 |
| 16 | 571.5 | 1-3/8 | 20 | 1-1/4 | 190 | 205 | 165 |
| 18 | 628.6 | 1-3/8 | 24 | 1-1/4 | 195 | 210 | 170 |
| 20 | 685.8 | 1-3/8 | 24 | 1-1/4 | 205 | 220 | 185 |
| 24 | 812.8 | 1-5/8 | 24 | 1-1/2 | 230 | 255 | 205 |
400# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 95 | 14.3 | 38 | 21.3 | 52 | 3 |
| 3/4 | 115 | 15.9 | 48 | 26.7 | 57 | 3 |
| 1 | 125 | 17.5 | 54 | 33.4 | 62 | 3 |
| 1-1/4 | 135 | 20.7 | 64 | 42.2 | 67 | 5 |
| 1-1/2 | 155 | 22.3 | 70 | 48.3 | 70 | 6 |
| 2 | 165 | 25.4 | 84 | 60.3 | 73 | 8 |
| 2-1/2 | 190 | 28.6 | 100 | 73 | 79 | 8 |
| 3 | 210 | 31.8 | 117 | 88.9 | 83 | 10 |
| 3-1/2 | 230 | 35 | 133 | 101.6 | 86 | 10 |
| 4 | 255 | 35 | 146 | 114.3 | 89 | BY P |
| 5 | 280 | 38.1 | 178 | 141.3 | 102 | BY P |
| 6 | 320 | 41.3 | 206 | 168.3 | 103 | BY P |
| 8 | 380 | 47.7 | 260 | 219.1 | 117 | BY P |
| 10 | 445 | 54 | 321 | 273 | 124 | BY P |
| 12 | 520 | 57.2 | 375 | 323.8 | 137 | BY P |
| 14 | 585 | 60.4 | 425 | 355.6 | 149 | BY P |
| 16 | 650 | 63.5 | 483 | 406.4 | 152 | BY P |
| 18 | 710 | 66.7 | 533 | 457 | 165 | BY P |
| 20 | 775 | 69.9 | 587 | 508 | 168 | BY P |
| 24 | 915 | 76.2 | 702 | 610 | 175 | BY P |
400# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 66.7 | 5/8 | 4 | 1/2 | 75 | 70 | 75 |
| 3/4 | 82.6 | 3/4 | 4 | 5/8 | 90 | 85 | 90 |
| 1 | 88.9 | 3/4 | 4 | 5/8 | 90 | 85 | 90 |
| 1-1/4 | 98.4 | 3/4 | 4 | 5/8 | 95 | 90 | 95 |
| 1-1/2 | 114.3 | 7/8 | 4 | 3/4 | 110 | 100 | 110 |
| 2 | 127.0 | 3/4 | 8 | 5/8 | 110 | 100 | 110 |
| 2-1/2 | 149.2 | 7/8 | 8 | 3/4 | 120 | 115 | 120 |
| 3 | 168.3 | 7/8 | 8 | 3/4 | 125 | 120 | 125 |
| 3-1/2 | 184.2 | 1 | 8 | 7/8 | 140 | 135 | 140 |
| 4 | 200.0 | 1 | 8 | 7/8 | 140 | 135 | 140 |
| 5 | 235.0 | 1 | 8 | 7/8 | 145 | 135 | 145 |
| 6 | 269.9 | 1 | 12 | 7/8 | 150 | 145 | 150 |
| 8 | 330.0 | 1-1/8 | 12 | 1 | 170 | 165 | 170 |
| 10 | 387.4 | 1-1/4 | 16 | 1-1/8 | 190 | 185 | 190 |
| 12 | 450.8 | 1-3/8 | 16 | 1-1/4 | 205 | 195 | 205 |
| 14 | 514.4 | 1-3/8 | 20 | 1-1/4 | 210 | 205 | 210 |
| 16 | 571.5 | 1-1/2 | 20 | 1-3/8 | 220 | 215 | 220 |
| 18 | 628.6 | 1-1/2 | 24 | 1-3/8 | 230 | 220 | 230 |
| 20 | 685.8 | 1-5/8 | 24 | 1-1/2 | 240 | 235 | 250 |
| 24 | 812.8 | 1-7/8 | 24 | 1-3/4 | 265 | 260 | 280 |
600# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 95 | 14.3 | 38 | 21.3 | 52 | BY P |
| 3/4 | 115 | 15.9 | 48 | 26.7 | 57 | BY P |
| 1 | 125 | 17.5 | 54 | 33.4 | 62 | BY P |
| 1-1/4 | 135 | 20.7 | 64 | 42.2 | 67 | BY P |
| 1-1/2 | 155 | 22.3 | 70 | 48.3 | 70 | BY P |
| 2 | 165 | 25.4 | 84 | 60.3 | 73 | BY P |
| 2-1/2 | 190 | 28.6 | 100 | 73 | 79 | BY P |
| 3 | 210 | 31.8 | 117 | 88.9 | 83 | BY P |
| 3-1/2 | 230 | 35 | 133 | 101.6 | 86 | BY P |
| 4 | 275 | 38.1 | 152 | 114.3 | 102 | BY P |
| 5 | 330 | 44.5 | 189 | 141.3 | 114 | BY P |
| 6 | 355 | 47.7 | 222 | 168.3 | 117 | BY P |
| 8 | 420 | 55.6 | 273 | 219.1 | 133 | BY P |
| 10 | 510 | 63.5 | 343 | 273 | 152 | BY P |
| 12 | 560 | 66.7 | 400 | 323.8 | 156 | BY P |
| 14 | 605 | 69.9 | 432 | 355.6 | 165 | BY P |
| 16 | 685 | 76.2 | 495 | 406.4 | 178 | BY P |
| 18 | 745 | 82.6 | 546 | 457 | 184 | BY P |
| 20 | 815 | 88.9 | 610 | 508 | 190 | BY P |
| 24 | 940 | 101.6 | 718 | 610 | 203 | BY P |
600# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 66.7 | 5/8 | 4 | 1/2 | 75 | 70 | 75 |
| 3/4 | 82.6 | 3/4 | 4 | 5/8 | 90 | 85 | 90 |
| 1 | 88.9 | 3/4 | 4 | 5/8 | 90 | 85 | 90 |
| 1-1/4 | 98.4 | 3/4 | 4 | 5/8 | 95 | 90 | 95 |
| 1-1/2 | 114.3 | 7/8 | 4 | 3/4 | 110 | 100 | 110 |
| 2 | 127.0 | 3/4 | 8 | 5/8 | 110 | 100 | 110 |
| 2-1/2 | 149.2 | 7/8 | 8 | 3/4 | 120 | 115 | 120 |
| 3 | 168.3 | 7/8 | 8 | 3/4 | 125 | 120 | 125 |
| 3-1/2 | 184.2 | 1 | 8 | 7/8 | 140 | 135 | 140 |
| 4 | 215.9 | 1 | 8 | 7/8 | 145 | 140 | 145 |
| 5 | 266.7 | 1-1/8 | 8 | 1 | 165 | 160 | 165 |
| 6 | 292.1 | 1-1/8 | 12 | 1 | 170 | 165 | 170 |
| 8 | 349.2 | 1-1/4 | 12 | 1-1/8 | 190 | 185 | 195 |
| 10 | 431.8 | 1-3/8 | 16 | 1-1/4 | 215 | 210 | 215 |
| 12 | 489.0 | 1-3/8 | 20 | 1-1/4 | 220 | 215 | 220 |
| 14 | 527.0 | 1-1/2 | 20 | 1-3/8 | 235 | 230 | 235 |
| 16 | 603.2 | 1-5/8 | 20 | 1-1/2 | 255 | 250 | 255 |
| 18 | 654.0 | 1-3/4 | 20 | 1-5/8 | 275 | 265 | 275 |
| 20 | 723.9 | 1-3/4 | 24 | 1-5/8 | 285 | 280 | 290 |
| 24 | 838.2 | 2 | 24 | 1-7/8 | 330 | 325 | 335 |
900# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 120 | 22.3 | 38 | 21.3 | 60 | BY P |
| 3/4 | 130 | 25.4 | 44 | 26.7 | 70 | BY P |
| 1 | 150 | 28.6 | 52 | 33.4 | 73 | BY P |
| 1-1/4 | 160 | 28.6 | 64 | 42.2 | 73 | BY P |
| 1-1/2 | 180 | 31.8 | 70 | 48.3 | 83 | BY P |
| 2 | 215 | 38.1 | 105 | 60.3 | 102 | BY P |
| 2-1/2 | 245 | 41.3 | 124 | 73 | 105 | BY P |
| 3 | 240 | 38.1 | 127 | 88.9 | 102 | BY P |
| 4 | 290 | 44.5 | 159 | 114.3 | 114 | BY P |
| 5 | 350 | 50.8 | 190 | 141.3 | 127 | BY P |
| 6 | 380 | 55.6 | 235 | 168.3 | 140 | BY P |
| 8 | 470 | 63.5 | 298 | 219.1 | 162 | BY P |
| 10 | 545 | 69.9 | 368 | 273 | 184 | BY P |
| 12 | 610 | 79.4 | 419 | 323.8 | 200 | BY P |
| 14 | 640 | 85.8 | 451 | 355.6 | 213 | BY P |
| 16 | 705 | 88.9 | 508 | 406.4 | 216 | BY P |
| 18 | 785 | 101.6 | 565 | 457 | 229 | BY P |
| 20 | 855 | 108 | 622 | 508 | 248 | BY P |
| 24 | 1040 | 139.7 | 749 | 610 | 292 | BY P |
900# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 82.6 | 7/8 | 4 | 3/4 | 110 | 100 | 110 |
| 3/4 | 88.9 | 7/8 | 4 | 3/4 | 115 | 110 | 115 |
| 1 | 101.6 | 1 | 4 | 7/8 | 125 | 120 | 125 |
| 1-1/4 | 111.1 | 1 | 4 | 7/8 | 125 | 120 | 125 |
| 1-1/2 | 123.8 | 1-1/8 | 4 | 1 | 140 | 135 | 140 |
| 2 | 165.1 | 1 | 8 | 7/8 | 145 | 140 | 145 |
| 2-1/2 | 190.5 | 1-1/8 | 8 | 1 | 160 | 150 | 160 |
| 3 | 190.5 | 1 | 8 | 7/8 | 145 | 140 | 145 |
| 4 | 235.0 | 1-1/4 | 8 | 1-1/8 | 170 | 165 | 170 |
| 5 | 279.4 | 1-3/8 | 8 | 1-1/4 | 190 | 185 | 190 |
| 6 | 317.5 | 1-1/4 | 12 | 1-1/8 | 190 | 185 | 195 |
| 8 | 393.7 | 1-1/2 | 12 | 1-3/8 | 220 | 215 | 220 |
| 10 | 469.9 | 1-1/2 | 16 | 1-3/8 | 235 | 230 | 235 |
| 12 | 533.4 | 1-1/2 | 20 | 1-3/8 | 255 | 250 | 255 |
| 14 | 558.8 | 1-5/8 | 20 | 1-1/2 | 275 | 265 | 280 |
| 16 | 616.0 | 1-3/4 | 20 | 1-5/8 | 285 | 280 | 290 |
| 18 | 685.8 | 2 | 20 | 1-7/8 | 325 | 320 | 335 |
| 20 | 749.3 | 2-1/8 | 20 | 2 | 350 | 345 | 360 |
| 24 | 901.7 | 2 5/8 | 20 | 2-1/2 | 440 | 430 | 455 |
1500# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 120 | 22.3 | 38 | 21.3 | 60 | BY P |
| 3/4 | 130 | 25.4 | 44 | 26.7 | 70 | BY P |
| 1 | 150 | 28.6 | 52 | 33.4 | 73 | BY P |
| 1-1/4 | 160 | 28.6 | 64 | 42.2 | 73 | BY P |
| 1-1/2 | 180 | 31.8 | 70 | 48.3 | 83 | BY P |
| 2 | 215 | 38.1 | 105 | 60.3 | 102 | BY P |
| 2-1/2 | 245 | 41.3 | 124 | 73 | 105 | BY P |
| 3 | 265 | 47.7 | 133 | 88.9 | 117 | BY P |
| 4 | 310 | 54 | 162 | 114.3 | 124 | BY P |
| 5 | 375 | 73.1 | 197 | 141.3 | 156 | BY P |
| 6 | 395 | 82.6 | 229 | 168.3 | 171 | BY P |
| 8 | 485 | 92.1 | 292 | 219.1 | 213 | BY P |
| 10 | 585 | 108 | 368 | 273 | 254 | BY P |
| 12 | 675 | 123.9 | 451 | 323.8 | 283 | BY P |
| 14 | 750 | 133.4 | 495 | 355.6 | 298 | BY P |
| 16 | 825 | 146.1 | 552 | 406.4 | 311 | BY P |
| 18 | 915 | 162 | 597 | 457 | 327 | BY P |
| 20 | 985 | 177.8 | 641 | 508 | 356 | BY P |
| 24 | 1170 | 203.2 | 762 | 610 | 406 | BY P |
1500# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 82.6 | 7/8 | 4 | 3/4 | 110 | 100 | 110 |
| 3/4 | 88.9 | 7/8 | 4 | 3/4 | 115 | 110 | 115 |
| 1 | 101.6 | 1 | 4 | 7/8 | 125 | 120 | 125 |
| 1-1/4 | 111.1 | 1 | 4 | 7/8 | 125 | 120 | 125 |
| 1-1/2 | 123.8 | 1-1/8 | 4 | 1 | 140 | 135 | 140 |
| 2 | 165.1 | 1 | 8 | 7/8 | 145 | 140 | 145 |
| 2-1/2 | 190.5 | 1-1/8 | 8 | 1 | 160 | 150 | 160 |
| 3 | 203.2 | 1-1/4 | 8 | 1-1/8 | 180 | 170 | 180 |
| 4 | 241.3 | 1 | 8 | 1-1/4 | 195 | 190 | 195 |
| 5 | 292.1 | 1-3/8 | 8 | 1-1/2 | 250 | 240 | 250 |
| 6 | 317.5 | 1-1/2 | 12 | 1-3/8 | 260 | 255 | 265 |
| 8 | 393.7 | 1-3/4 | 12 | 1-3/8 | 290 | 285 | 325 |
| 10 | 482.6 | 2 | 12 | 1-7/8 | 335 | 330 | 345 |
| 12 | 571.5 | 2-1/8 | 16 | 2 | 375 | 370 | 385 |
| 14 | 635.0 | 2-3/8 | 16 | 2-1/4 | 405 | 400 | 425 |
| 16 | 704.8 | 2-5/8 | 16 | 2-1/2 | 445 | 440 | 470 |
| 18 | 774.7 | 2-7/8 | 16 | 2-3/4 | 495 | 490 | 525 |
| 20 | 831.8 | 3-1/8 | 16 | 3 | 540 | 535 | 565 |
| 24 | 990.6 | 3-5/8 | 16 | 3-1/2 | 615 | 610 | 650 |
2500# Weldneck Flange Dimensions as per ASME B16.5
Flange Body Dimensions
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
|---|---|---|---|---|---|---|
| 1/2 | 135 | 30.2 | 43 | 21.3 | 73 | BY P |
| 3/4 | 140 | 31.8 | 51 | 26.7 | 79 | BY P |
| 1 | 160 | 35 | 57 | 33.4 | 89 | BY P |
| 1-1/4 | 185 | 38.1 | 73 | 42.2 | 95 | BY P |
| 1-1/2 | 205 | 44.5 | 79 | 48.3 | 111 | BY P |
| 2 | 235 | 50.9 | 95 | 60.3 | 127 | BY P |
| 2-1/2 | 265 | 57.2 | 114 | 73 | 143 | BY P |
| 3 | 305 | 66.7 | 133 | 88.9 | 168 | BY P |
| 4 | 355 | 76.2 | 165 | 114.3 | 190 | BY P |
| 5 | 420 | 92.1 | 203 | 141.3 | 229 | BY P |
| 6 | 485 | 108 | 235 | 168.3 | 273 | BY P |
| 8 | 550 | 127 | 305 | 219.1 | 318 | BY P |
| 10 | 675 | 165.1 | 375 | 273 | 419 | BY P |
| 12 | 760 | 184.2 | 441 | 323.8 | 464 | BY P |
| NPS | O Flange OD | Ttf Thickness | X Hub Dia | A Hub Dia | Y Length | B Bore Dia |
2500# Bolts Template
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
|---|---|---|---|---|---|---|---|
| 1/2 | 88.9 | 7/8 | 4 | 3/4 | 120 | 115 | 120 |
| 3/4 | 95.2 | 7/8 | 4 | 3/4 | 125 | 120 | 125 |
| 1 | 108.0 | 1 | 4 | 7/8 | 140 | 135 | 140 |
| 1-1/4 | 130.2 | 1-1/8 | 4 | 1 | 150 | 145 | 150 |
| 1-1/2 | 146.0 | 1-1/4 | 4 | 1-1/8 | 170 | 165 | 170 |
| 2 | 171.4 | 1-1/8 | 8 | 1 | 180 | 170 | 180 |
| 2-1/2 | 196.8 | 1-1/4 | 8 | 1-1/8 | 195 | 190 | 205 |
| 3 | 228.6 | 1-3/8 | 8 | 1-1/4 | 220 | 215 | 230 |
| 4 | 273.0 | 1-5/8 | 8 | 1-1/2 | 255 | 250 | 260 |
| 5 | 323.8 | 1-7/8 | 8 | 1-3/4 | 300 | 290 | 310 |
| 6 | 368.3 | 2-1/8 | 8 | 2 | 345 | 335 | 355 |
| 8 | 438.2 | 2-1/8 | 12 | 2 | 380 | 375 | 395 |
| 10 | 539.8 | 2-5/8 | 12 | 2-1/2 | 490 | 485 | 510 |
| 12 | 619.1 | 2-7/8 | 12 | 2-3/4 | 540 | 535 | 560 |
| NPS | BCD Bolt Circle Dia. | BHD Bolt Hole Dia | BOLTS Number of Bolts | BD Dia. Of Bolt | SBL RF Stud Bolt Length (RF) | SBL RJ Stud Bolt Length (RJ) | MBL RF Machine Bolt Length (RF) |
General Notes
Dimensions are in millimeters, except for diameters of bolts and bolt holes, which are in inch units.
