Class300(PN50)带颈对焊法兰的尺寸~HG/T 20615-2009
发布时间：2022-11-01 点击数：738
Class300(PN50)带颈对焊法兰的尺寸~HG/T 20615-2009
| DN | NPS | 钢管外径, A | 法兰外径，D | 螺栓孔中心圆直径，K | 螺栓孔直径，L | 螺栓规格 | 螺栓孔数 | 密封面直径 | 密封面高度 | 法兰内径，B | 法兰颈部直径，N | 法兰厚度,C | 法兰高度，H |
| 15 | 1/2 | 21.3 | 95 | 66.7 | 16 | M14 | 4 | 34.9 | 2 | 15.5 | 38 | 12.7 | 51 |
| 20 | 3/4 | 26.7 | 115 | 82.6 | 18 | M16 | 4 | 42.9 | 2 | 21 | 48 | 14.3 | 56 |
| 25 | 1 | 33.4 | 125 | 88.9 | 18 | M16 | 4 | 50.8 | 2 | 27 | 54 | 15.9 | 60 |
| 32 | 1 ¼ | 42.2 | 135 | 98.4 | 18 | M16 | 4 | 63.5 | 2 | 35 | 64 | 17.5 | 64 |
| 40 | 1 ½ | 48.3 | 155 | 114.3 | 22 | M20 | 4 | 73.0 | 2 | 41 | 70 | 19.1 | 67 |
| 50 | 2 | 60.3 | 165 | 127.0 | 18 | M16 | 8 | 92.1 | 2 | 52 | 84 | 20.7 | 68 |
| 65 | 2 ½ | 76.1 | 190 | 149.2 | 22 | M20 | 8 | 104.8 | 2 | 66 | 100 | 23.9 | 75 |
| 80 | 3 | 88.9 | 210 | 168.3 | 22 | M20 | 8 | 127.0 | 2 | 77.5 | 117 | 27.0 | 78 |
| 100 | 4 | 114.3 | 255 | 200.0 | 22 | M20 | 8 | 157.2 | 2 | 101.5 | 146 | 30.2 | 84 |
| 125 | 5 | 141.3 | 280 | 235.0 | 22 | M20 | 8 | 185.7 | 2 | 127 | 178 | 33.4 | 97 |
| 150 | 6 | 168.3 | 320 | 269.9 | 22 | M20 | 12 | 215.9 | 2 | 154 | 206 | 35.0 | 97 |
| 200 | 8 | 219.1 | 380 | 330.2 | 26 | M24 | 12 | 269.9 | 2 | 203 | 260 | 39.7 | 110 |
| 250 | 10 | 273.0 | 445 | 387.4 | 30 | M27 | 16 | 323.8 | 2 | 255 | 321 | 46.1 | 116 |
| 300 | 12 | 323.8 | 520 | 450.8 | 33 | M30 | 16 | 381.0 | 2 | 303.5 | 375 | 49.3 | 129 |
| 350 | 14 | 355.6 | 585 | 514.4 | 33 | M30 | 20 | 412.8 | 2 | - | 425 | 52.4 | 141 |
| 400 | 16 | 406.4 | 650 | 571.5 | 36 | M33 | 20 | 469.9 | 2 | - | 483 | 55.6 | 144 |
| 450 | 18 | 457.0 | 710 | 628.6 | 36 | M33 | 24 | 533.4 | 2 | - | 533 | 58.8 | 157 |
| 500 | 20 | 508.0 | 775 | 685.8 | 36 | M33 | 24 | 584.2 | 2 | - | 587 | 62.0 | 160 |
| 600 | 24 | 610.0 | 915 | 812.8 | 42 | M39 | 24 | 692.2 | 2 | - | 702 | 68.3 | 167 |
法兰内径B由钢管壁厚确定，表列内径相当于采用钢管壁厚Sch40。