ASME B16.5 对焊 (WN) 法兰：各压力等级的尺寸和重量
带锥形颈部、与管道对接焊接的法兰。颈部可分散应力，因此是高压、高温、热循环和疲劳工况的标准选择。
标准ASME B16.5-2020
压力等级150, 300, 400, 600, 900, 1,500, 2,500
150 级规格范围NPS ½ 至 24
单位毫米、千克；孔和螺栓为英寸
按压力等级列出的尺寸
选择压力等级并点击某一行：图形会切换为该口径的比例和尺寸。
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 89 | 9.7 | 30 | 21.3 | 46 | 15.7 | 60.5 | 4 | ⅝" | ½" | 0.5 |
| ¾" | 20 | 99 | 11.2 | 38 | 26.7 | 51 | 20.8 | 69.8 | 4 | ⅝" | ½" | 0.7 |
| 1" | 25 | 108 | 12.7 | 49 | 33.5 | 54 | 26.7 | 79.2 | 4 | ⅝" | ½" | 1.1 |
| 1¼" | 32 | 117 | 14.2 | 59 | 42.2 | 56 | 35.1 | 88.9 | 4 | ⅝" | ½" | 1.4 |
| 1½" | 40 | 127 | 15.9 | 65 | 48.3 | 60 | 40.9 | 98.6 | 4 | ⅝" | ½" | 1.8 |
| 2" | 50 | 152 | 17.5 | 78 | 60.5 | 62 | 52.6 | 120.6 | 4 | ¾" | ⅝" | 2.7 |
| 2½" | 65 | 178 | 20.6 | 90 | 73.2 | 68 | 62.7 | 139.7 | 4 | ¾" | ⅝" | 4.2 |
| 3" | 80 | 190 | 22.4 | 108 | 88.9 | 68 | 78.0 | 152.4 | 4 | ¾" | ⅝" | 5.1 |
| 3½" | 90 | 216 | 22.4 | 122 | 101.6 | 70 | 90.2 | 177.8 | 8 | ¾" | ⅝" | 6.3 |
| 4" | 100 | 229 | 22.4 | 135 | 114.3 | 75 | 102.4 | 190.5 | 8 | ¾" | ⅝" | 7.2 |
| 5" | 125 | 254 | 22.4 | 164 | 141.2 | 87 | 128.3 | 215.9 | 8 | ⅞" | ¾" | 9 |
| 6" | 150 | 279 | 23.9 | 192 | 168.4 | 87 | 154.2 | 241.3 | 8 | ⅞" | ¾" | 11 |
| 8" | 200 | 343 | 26.9 | 246 | 219.2 | 100 | 202.7 | 298.4 | 8 | ⅞" | ¾" | 18.2 |
| 10" | 250 | 406 | 28.4 | 305 | 273.0 | 100 | 254.5 | 362.0 | 12 | 1" | ⅞" | 24.9 |
| 12" | 300 | 483 | 30.2 | 365 | 323.8 | 113 | 304.8 | 431.8 | 12 | 1" | ⅞" | 38.4 |
| 14" | 350 | 533 | 33.3 | 400 | 355.6 | 125 | 客户 | 476.2 | 12 | 1⅛" | 1" | 50.4 |
| 16" | 400 | 597 | 35.1 | 457 | 406.4 | 125 | 客户 | 539.8 | 16 | 1⅛" | 1" | 62.8 |
| 18" | 450 | 635 | 38.1 | 505 | 457.2 | 138 | 客户 | 577.8 | 16 | 1¼" | 1⅛" | 71.2 |
| 20" | 500 | 698.5 | 41.1 | 559 | 508.0 | 143 | 客户 | 635.0 | 20 | 1¼" | 1⅛" | 85.8 |
| 22" | 550 | 749 | 44.4 | 610 | 558.8 | 148 | 客户 | 692.2 | 20 | 1⅜" | 1¼" | 100.5 |
| 24" | 600 | 813 | 46.0 | 663 | 609.6 | 151 | 客户 | 749.3 | 20 | 1⅜" | 1¼" | 119.4 |
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 95 | 12.7 | 38 | 21.3 | 51 | 15.7 | 66.5 | 4 | ⅝" | ½" | 0.8 |
| ¾" | 20 | 117 | 14.2 | 48 | 26.7 | 56 | 20.8 | 82.6 | 4 | ¾" | ⅝" | 1.3 |
| 1" | 25 | 124 | 15.7 | 54 | 33.5 | 60 | 26.7 | 88.9 | 4 | ¾" | ⅝" | 1.6 |
| 1¼" | 32 | 133 | 17.5 | 64 | 42.2 | 64 | 35.1 | 98.6 | 4 | ¾" | ⅝" | 2.1 |
| 1½" | 40 | 155 | 19.0 | 70 | 48.3 | 67 | 40.9 | 114.3 | 4 | ⅞" | ¾" | 3 |
| 2" | 50 | 165 | 20.6 | 84 | 60.5 | 68 | 52.6 | 127.0 | 8 | ¾" | ⅝" | 3.5 |
| 2½" | 65 | 190 | 23.9 | 100 | 73.2 | 75 | 62.7 | 149.4 | 8 | ⅞" | ¾" | 5.4 |
| 3" | 80 | 210 | 26.9 | 117 | 88.9 | 78 | 78.0 | 168.1 | 8 | ⅞" | ¾" | 7.2 |
| 3½" | 90 | 229 | 28.4 | 133 | 101.6 | 80 | 90.2 | 184.2 | 8 | ⅞" | ¾" | 9 |
| 4" | 100 | 254 | 30.2 | 146 | 114.3 | 84 | 102.4 | 200.2 | 8 | ⅞" | ¾" | 11.6 |
| 5" | 125 | 279 | 33.3 | 178 | 141.2 | 97 | 128.3 | 235.0 | 8 | ⅞" | ¾" | 15.6 |
| 6" | 150 | 318 | 35.1 | 206 | 168.4 | 97 | 154.2 | 269.7 | 12 | ⅞" | ¾" | 20 |
| 8" | 200 | 381 | 39.6 | 260 | 219.2 | 110 | 202.7 | 330.2 | 12 | 1" | ⅞" | 31 |
| 10" | 250 | 444 | 46.0 | 321 | 273.0 | 116 | 254.5 | 387.4 | 16 | 1⅛" | 1" | 44.4 |
| 12" | 300 | 521 | 49.3 | 375 | 323.8 | 129 | 304.8 | 450.8 | 16 | 1¼" | 1⅛" | 64.3 |
| 14" | 350 | 584 | 52.3 | 425 | 355.6 | 141 | 客户 | 514.4 | 20 | 1¼" | 1⅛" | 89.1 |
| 16" | 400 | 648 | 55.6 | 483 | 406.4 | 145 | 客户 | 571.5 | 20 | 1⅜" | 1¼" | 111.4 |
| 18" | 450 | 711 | 58.7 | 533 | 457.2 | 157 | 客户 | 628.6 | 24 | 1⅜" | 1¼" | 136.3 |
| 20" | 500 | 775 | 62.0 | 587 | 508.0 | 161 | 客户 | 685.8 | 24 | 1⅜" | 1¼" | 165.4 |
| 22" | 550 | 838 | 65.0 | 641 | 558.8 | 164 | 客户 | 743.0 | 24 | 1⅝" | 1½" | 191.7 |
| 24" | 600 | 914 | 68.3 | 702 | 609.6 | 167 | 客户 | 812.8 | 24 | 1⅝" | 1½" | 238.9 |
NPS 3½ 以内，400 级采用与 600 级相同的尺寸（标有“= 600”的行）。
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" = 600 | 15 | 95 | 14.2 | 38 | 21.3 | 52 | 客户 | 66.5 | 4 | ⅝" | ½" | 0.9 |
| ¾" = 600 | 20 | 117 | 15.7 | 48 | 26.7 | 57 | 客户 | 82.6 | 4 | ¾" | ⅝" | 1.5 |
| 1" = 600 | 25 | 124 | 17.5 | 54 | 33.5 | 62 | 客户 | 88.9 | 4 | ¾" | ⅝" | 1.8 |
| 1¼" = 600 | 32 | 133 | 20.6 | 64 | 42.2 | 67 | 客户 | 98.6 | 4 | ¾" | ⅝" | 2.5 |
| 1½" = 600 | 40 | 155 | 22.4 | 70 | 48.3 | 70 | 客户 | 114.3 | 4 | ⅞" | ¾" | 3.5 |
| 2" = 600 | 50 | 165 | 25.4 | 84 | 60.5 | 73 | 客户 | 127.0 | 8 | ¾" | ⅝" | 4.3 |
| 2½" = 600 | 65 | 190 | 28.4 | 100 | 73.2 | 79 | 客户 | 149.4 | 8 | ⅞" | ¾" | 6.3 |
| 3" = 600 | 80 | 210 | 31.8 | 117 | 88.9 | 83 | 客户 | 168.1 | 8 | ⅞" | ¾" | 8.5 |
| 3½" = 600 | 90 | 229 | 35.1 | 133 | 101.6 | 86 | 客户 | 184.2 | 8 | 1" | ⅞" | 10.7 |
| 4" | 100 | 254 | 35.1 | 146 | 114.3 | 89 | 客户 | 200.2 | 8 | 1" | ⅞" | 13.3 |
| 5" | 125 | 279 | 38.1 | 178 | 141.2 | 102 | 客户 | 235.0 | 8 | 1" | ⅞" | 17.5 |
| 6" | 150 | 318 | 41.1 | 206 | 168.4 | 103 | 客户 | 269.7 | 12 | 1" | ⅞" | 22.9 |
| 8" | 200 | 381 | 47.8 | 260 | 219.2 | 117 | 客户 | 330.2 | 12 | 1⅛" | 1" | 36.1 |
| 10" | 250 | 444 | 53.8 | 321 | 273.0 | 124 | 客户 | 387.4 | 16 | 1¼" | 1⅛" | 50.4 |
| 12" | 300 | 521 | 57.2 | 375 | 323.8 | 137 | 客户 | 450.8 | 16 | 1⅜" | 1¼" | 72.6 |
| 14" | 350 | 584 | 60.5 | 425 | 355.6 | 149 | 客户 | 514.4 | 20 | 1⅜" | 1¼" | 99.7 |
| 16" | 400 | 648 | 63.5 | 483 | 406.4 | 152 | 客户 | 571.5 | 20 | 1½" | 1⅜" | 123.4 |
| 18" | 450 | 711 | 66.5 | 533 | 457.2 | 165 | 客户 | 628.6 | 24 | 1½" | 1⅜" | 150.5 |
| 20" | 500 | 775 | 69.8 | 587 | 508.0 | 168 | 客户 | 685.8 | 24 | 1⅝" | 1½" | 179.1 |
| 22" | 550 | 838 | 73.2 | 641 | 558.8 | 171 | 客户 | 743.0 | 24 | 1¾" | 1⅝" | 210.5 |
| 24" | 600 | 914 | 76.2 | 702 | 609.6 | 175 | 客户 | 812.8 | 24 | 1⅞" | 1¾" | 258.2 |
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 95 | 14.2 | 38 | 21.3 | 52 | 客户 | 66.5 | 4 | ⅝" | ½" | 0.9 |
| ¾" | 20 | 117 | 15.7 | 48 | 26.7 | 57 | 客户 | 82.6 | 4 | ¾" | ⅝" | 1.5 |
| 1" | 25 | 124 | 17.5 | 54 | 33.5 | 62 | 客户 | 88.9 | 4 | ¾" | ⅝" | 1.8 |
| 1¼" | 32 | 133 | 20.6 | 64 | 42.2 | 67 | 客户 | 98.6 | 4 | ¾" | ⅝" | 2.5 |
| 1½" | 40 | 155 | 22.4 | 70 | 48.3 | 70 | 客户 | 114.3 | 4 | ⅞" | ¾" | 3.5 |
| 2" | 50 | 165 | 25.4 | 84 | 60.5 | 73 | 客户 | 127.0 | 8 | ¾" | ⅝" | 4.3 |
| 2½" | 65 | 190 | 28.4 | 100 | 73.2 | 79 | 客户 | 149.4 | 8 | ⅞" | ¾" | 6.3 |
| 3" | 80 | 210 | 31.8 | 117 | 88.9 | 83 | 客户 | 168.1 | 8 | ⅞" | ¾" | 8.5 |
| 3½" | 90 | 229 | 35.1 | 133 | 101.6 | 86 | 客户 | 184.2 | 8 | 1" | ⅞" | 10.7 |
| 4" | 100 | 273 | 38.1 | 152 | 114.3 | 102 | 客户 | 215.9 | 8 | 1" | ⅞" | 17.3 |
| 5" | 125 | 330 | 44.4 | 189 | 141.2 | 114 | 客户 | 266.7 | 8 | 1⅛" | 1" | 28.9 |
| 6" | 150 | 356 | 47.8 | 222 | 168.4 | 117 | 客户 | 292.1 | 12 | 1⅛" | 1" | 34.6 |
| 8" | 200 | 419 | 55.6 | 273 | 219.2 | 133 | 客户 | 349.2 | 12 | 1¼" | 1⅛" | 52.6 |
| 10" | 250 | 508 | 63.5 | 343 | 273.0 | 152 | 客户 | 431.8 | 16 | 1⅜" | 1¼" | 86.3 |
| 12" | 300 | 559 | 66.5 | 400 | 323.8 | 155 | 客户 | 489.0 | 20 | 1⅜" | 1¼" | 103.1 |
| 14" | 350 | 603 | 69.8 | 432 | 355.6 | 165 | 客户 | 527.0 | 20 | 1½" | 1⅜" | 122.3 |
| 16" | 400 | 686 | 76.2 | 495 | 406.4 | 178 | 客户 | 603.2 | 20 | 1⅝" | 1½" | 171.1 |
| 18" | 450 | 743 | 82.6 | 546 | 457.2 | 184 | 客户 | 654.0 | 20 | 1¾" | 1⅝" | 204.6 |
| 20" | 500 | 813 | 88.9 | 610 | 508.0 | 190 | 客户 | 723.9 | 24 | 1¾" | 1⅝" | 255.6 |
| 22" | 550 | 870 | 95.2 | 663 | 558.8 | 197 | 客户 | 777.7 | 24 | 1⅞" | 1¾" | 298 |
| 24" | 600 | 940 | 101.6 | 718 | 609.6 | 203 | 客户 | 838.2 | 24 | 2" | 1⅞" | 359.4 |
NPS 2½ 以内，900 级采用与 1500 级相同的尺寸（标有“= 1500”的行）。
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" = 1500 | 15 | 121 | 22.4 | 38 | 21.3 | 60 | 客户 | 82.6 | 4 | ⅞" | ¾" | 1.9 |
| ¾" = 1500 | 20 | 130 | 25.4 | 44 | 26.7 | 70 | 客户 | 88.9 | 4 | ⅞" | ¾" | 2.6 |
| 1" = 1500 | 25 | 149 | 28.4 | 52 | 33.5 | 73 | 客户 | 101.6 | 4 | 1" | ⅞" | 3.7 |
| 1¼" = 1500 | 32 | 159 | 28.4 | 64 | 42.2 | 73 | 客户 | 111.1 | 4 | 1" | ⅞" | 4.3 |
| 1½" = 1500 | 40 | 178 | 31.8 | 70 | 48.3 | 83 | 客户 | 124.0 | 4 | 1⅛" | 1" | 6 |
| 2" = 1500 | 50 | 216 | 38.1 | 105 | 60.5 | 102 | 客户 | 165.1 | 8 | 1" | ⅞" | 11 |
| 2½" = 1500 | 65 | 244 | 41.1 | 124 | 73.2 | 105 | 客户 | 190.5 | 8 | 1⅛" | 1" | 15.1 |
| 3" | 80 | 241 | 38.1 | 127 | 88.9 | 102 | 客户 | 190.5 | 8 | 1" | ⅞" | 13.6 |
| 4" | 100 | 292 | 44.5 | 159 | 114.3 | 114 | 客户 | 235.0 | 8 | 1¼" | 1⅛" | 22.4 |
| 5" | 125 | 349 | 50.8 | 190 | 141.2 | 127 | 客户 | 279.4 | 8 | 1⅜" | 1¼" | 35.9 |
| 6" | 150 | 381 | 55.6 | 235 | 168.4 | 140 | 客户 | 317.5 | 12 | 1¼" | 1⅛" | 47.4 |
| 8" | 200 | 470 | 63.5 | 298 | 219.2 | 162 | 客户 | 393.7 | 12 | 1½" | 1⅜" | 80.8 |
| 10" | 250 | 546 | 69.8 | 368 | 273.0 | 184 | 客户 | 469.9 | 16 | 1½" | 1⅜" | 119.3 |
| 12" | 300 | 610 | 79.2 | 419 | 323.8 | 200 | 客户 | 533.4 | 20 | 1½" | 1⅜" | 158.3 |
| 14" | 350 | 641 | 85.9 | 451 | 355.6 | 213 | 客户 | 558.8 | 20 | 1⅝" | 1½" | 181.1 |
| 16" | 400 | 705 | 88.9 | 508 | 406.4 | 216 | 客户 | 616.0 | 20 | 1¾" | 1⅝" | 218.2 |
| 18" | 450 | 787 | 101.6 | 565 | 457.2 | 229 | 客户 | 685.8 | 20 | 2" | 1⅞" | 294.2 |
| 20" | 500 | 857 | 108.0 | 622 | 508.0 | 248 | 客户 | 749.3 | 20 | 2⅛" | 2" | 365.2 |
| 24" | 600 | 1041 | 139.7 | 749 | 609.6 | 292 | 客户 | 901.7 | 20 | 2⅝" | 2½" | 668.9 |
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 121 | 22.4 | 38 | 21.3 | 60 | 客户 | 82.6 | 4 | ⅞" | ¾" | 1.9 |
| ¾" | 20 | 130 | 25.4 | 44 | 26.7 | 70 | 客户 | 88.9 | 4 | ⅞" | ¾" | 2.6 |
| 1" | 25 | 149 | 28.4 | 52 | 33.5 | 73 | 客户 | 101.6 | 4 | 1" | ⅞" | 3.7 |
| 1¼" | 32 | 159 | 28.4 | 64 | 42.2 | 73 | 客户 | 111.1 | 4 | 1" | ⅞" | 4.3 |
| 1½" | 40 | 178 | 31.8 | 70 | 48.3 | 83 | 客户 | 124.0 | 4 | 1⅛" | 1" | 6 |
| 2" | 50 | 216 | 38.1 | 105 | 60.5 | 102 | 客户 | 165.1 | 8 | 1" | ⅞" | 11 |
| 2½" | 65 | 244 | 41.1 | 124 | 73.2 | 105 | 客户 | 190.5 | 8 | 1⅛" | 1" | 15.1 |
| 3" | 80 | 267 | 47.8 | 133 | 88.9 | 117 | 客户 | 203.2 | 8 | 1¼" | 1⅛" | 20 |
| 4" | 100 | 311 | 53.8 | 162 | 114.3 | 124 | 客户 | 241.3 | 8 | 1⅜" | 1¼" | 29.7 |
| 5" | 125 | 375 | 73.2 | 197 | 141.2 | 155 | 客户 | 292.1 | 8 | 1⅝" | 1½" | 56.8 |
| 6" | 150 | 394 | 82.6 | 229 | 168.4 | 171 | 客户 | 317.5 | 12 | 1½" | 1⅜" | 67.7 |
| 8" | 200 | 483 | 91.9 | 292 | 219.2 | 213 | 客户 | 393.7 | 12 | 1¾" | 1⅝" | 115.1 |
| 10" | 250 | 584 | 108.0 | 368 | 273.0 | 254 | 客户 | 482.6 | 12 | 2" | 1⅞" | 199.8 |
| 12" | 300 | 673 | 124.0 | 451 | 323.8 | 282 | 客户 | 571.5 | 16 | 2⅛" | 2" | 298.7 |
| 14" | 350 | 749 | 133.4 | 495 | 355.6 | 298 | 客户 | 635.0 | 16 | 2⅜" | 2¼" | 392.9 |
| 16" | 400 | 826 | 146.0 | 552 | 406.4 | 311 | 客户 | 704.8 | 16 | 2⅝" | 2½" | 500.6 |
| 18" | 450 | 914 | 162.1 | 597 | 457.2 | 327 | 客户 | 774.7 | 16 | 2⅞" | 2¾" | 650.4 |
| 20" | 500 | 984 | 177.8 | 641 | 508.0 | 356 | 客户 | 831.8 | 16 | 3⅛" | 3" | 794.4 |
| 24" | 600 | 1168 | 203.2 | 762 | 609.6 | 406 | 客户 | 990.6 | 16 | 3⅝" | 3½" | 1261.8 |
| NPS | DN | O | tf | X | Ah | Y | B | W | 孔数 | 孔 Ø | 螺栓 Ø | 重量* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 133 | 30.2 | 43 | 21.3 | 73 | 客户 | 88.9 | 4 | ⅞" | ¾" | 3.1 |
| ¾" | 20 | 140 | 31.8 | 51 | 26.7 | 79 | 客户 | 95.2 | 4 | ⅞" | ¾" | 3.8 |
| 1" | 25 | 159 | 35.1 | 57 | 33.5 | 89 | 客户 | 108.0 | 4 | 1" | ⅞" | 5.3 |
| 1¼" | 32 | 184 | 38.1 | 73 | 42.2 | 95 | 客户 | 130.0 | 4 | 1⅛" | 1" | 7.8 |
| 1½" | 40 | 203 | 44.4 | 79 | 48.3 | 111 | 客户 | 146.0 | 4 | 1¼" | 1⅛" | 10.9 |
| 2" | 50 | 235 | 50.8 | 95 | 60.5 | 127 | 客户 | 171.4 | 8 | 1⅛" | 1" | 16.2 |
| 2½" | 65 | 267 | 57.2 | 114 | 73.2 | 143 | 客户 | 196.8 | 8 | 1¼" | 1⅛" | 23.8 |
| 3" | 80 | 305 | 66.5 | 133 | 88.9 | 168 | 客户 | 228.6 | 8 | 1⅜" | 1¼" | 36 |
| 4" | 100 | 356 | 76.2 | 165 | 114.3 | 190 | 客户 | 273.0 | 8 | 1⅝" | 1½" | 55.2 |
| 5" | 125 | 419 | 91.9 | 203 | 141.2 | 229 | 客户 | 323.8 | 8 | 1⅞" | 1¾" | 92 |
| 6" | 150 | 483 | 108.0 | 235 | 168.4 | 273 | 客户 | 368.3 | 8 | 2⅛" | 2" | 142.5 |
| 8" | 200 | 552 | 127.0 | 305 | 219.2 | 318 | 客户 | 438.2 | 12 | 2⅛" | 2" | 213.5 |
| 10" | 250 | 673 | 165.1 | 375 | 273.0 | 419 | 客户 | 539.8 | 12 | 2⅝" | 2½" | 406.7 |
| 12" | 300 | 762 | 184.2 | 441 | 323.8 | 464 | 客户 | 619.3 | 12 | 2⅞" | 2¾" | 577.3 |
剖面图，与表中尺寸（毫米）成比例。
O = 外径 · tf = 不含凸面的厚度 · X = 颈部根部直径 · Ah = 坡口处直径 · Y = 不含凸面的总长度 · B = 内孔 · W = 螺栓孔圆. * 重量按碳钢几何尺寸估算。
常见问题
ASME B16.5 对焊 (WN) 法兰：各压力等级的尺寸和重量 用于什么场合？
带锥形颈部、与管道对接焊接的法兰。颈部可分散应力，因此是高压、高温、热循环和疲劳工况的标准选择。
尺寸是否包含凸台？
不包含。自 2017 版起，ASME B16.5 中的厚度 (tf) 和长度 (Y) 均不含凸台。150 级和 300 级加 1.6 mm，400 级及以上加 6.4 mm。
Dustre 可供应哪些材料？
A105 和 A350 LF2 碳钢、F304L 和 F316L 不锈钢、F51/F60 双相钢、F53/F55 超级双相钢、F11、F22 和 F91 铬钼钢、镍基合金和钛，均为锻造并机加工，附 3.1 证书。
特殊合金对焊（welding neck）由 Dustre 锻造并机加工，任意压力等级，附 3.1 证书。
申请报价 