ASME B16.5 螺纹 (TH) 法兰：各压力等级的尺寸
带锥形 NPT 螺纹、无需焊接即可装配的法兰。适用于不便焊接、振动小、温度中等的场合。
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 | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 89 | 9.7 | 30 | 14 | 16 | 60.5 | 4 | ⅝" | ½" |
| ¾" | 20 | 99 | 11.2 | 38 | 14 | 16 | 69.8 | 4 | ⅝" | ½" |
| 1" | 25 | 108 | 12.7 | 49 | 16 | 18 | 79.2 | 4 | ⅝" | ½" |
| 1¼" | 32 | 117 | 14.2 | 59 | 19 | 21 | 88.9 | 4 | ⅝" | ½" |
| 1½" | 40 | 127 | 15.9 | 65 | 21 | 22 | 98.6 | 4 | ⅝" | ½" |
| 2" | 50 | 152 | 17.5 | 78 | 24 | 25 | 120.6 | 4 | ¾" | ⅝" |
| 2½" | 65 | 178 | 20.6 | 90 | 27 | 28 | 139.7 | 4 | ¾" | ⅝" |
| 3" | 80 | 190 | 22.4 | 108 | 28 | 30 | 152.4 | 4 | ¾" | ⅝" |
| 3½" | 90 | 216 | 22.4 | 122 | 30 | 32 | 177.8 | 8 | ¾" | ⅝" |
| 4" | 100 | 229 | 22.4 | 135 | 32 | 33 | 190.5 | 8 | ¾" | ⅝" |
| 5" | 125 | 254 | 22.4 | 164 | 35 | 37 | 215.9 | 8 | ⅞" | ¾" |
| 6" | 150 | 279 | 23.9 | 192 | 38 | 40 | 241.3 | 8 | ⅞" | ¾" |
| 8" | 200 | 343 | 26.9 | 246 | 43 | 44 | 298.4 | 8 | ⅞" | ¾" |
| 10" | 250 | 406 | 28.4 | 305 | 48 | 49 | 362.0 | 12 | 1" | ⅞" |
| 12" | 300 | 483 | 30.2 | 365 | 54 | 56 | 431.8 | 12 | 1" | ⅞" |
| 14" | 350 | 533 | 33.3 | 400 | 56 | 57 | 476.2 | 12 | 1⅛" | 1" |
| 16" | 400 | 597 | 35.1 | 457 | 62 | 64 | 539.8 | 16 | 1⅛" | 1" |
| 18" | 450 | 635 | 38.1 | 505 | 67 | 68 | 577.8 | 16 | 1¼" | 1⅛" |
| 20" | 500 | 698.5 | 41.1 | 559 | 71 | 73 | 635.0 | 20 | 1¼" | 1⅛" |
| 24" | 600 | 813 | 46.0 | 663 | 81 | 83 | 749.3 | 20 | 1⅜" | 1¼" |
| NPS | DN | O | tf | X | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 95 | 12.7 | 38 | 21 | 16 | 66.5 | 4 | ⅝" | ½" |
| ¾" | 20 | 117 | 14.2 | 48 | 24 | 16 | 82.6 | 4 | ¾" | ⅝" |
| 1" | 25 | 124 | 15.7 | 54 | 25 | 18 | 88.9 | 4 | ¾" | ⅝" |
| 1¼" | 32 | 133 | 17.5 | 64 | 25 | 21 | 98.6 | 4 | ¾" | ⅝" |
| 1½" | 40 | 155 | 19.0 | 70 | 29 | 22 | 114.3 | 4 | ⅞" | ¾" |
| 2" | 50 | 165 | 20.6 | 84 | 32 | 28 | 127.0 | 8 | ¾" | ⅝" |
| 2½" | 65 | 190 | 23.9 | 100 | 37 | 32 | 149.4 | 8 | ⅞" | ¾" |
| 3" | 80 | 210 | 26.9 | 117 | 41 | 32 | 168.1 | 8 | ⅞" | ¾" |
| 3½" | 90 | 229 | 28.4 | 133 | 43 | 37 | 184.2 | 8 | ⅞" | ¾" |
| 4" | 100 | 254 | 30.2 | 146 | 46 | 37 | 200.2 | 8 | ⅞" | ¾" |
| 5" | 125 | 279 | 33.3 | 178 | 49 | 43 | 235.0 | 8 | ⅞" | ¾" |
| 6" | 150 | 318 | 35.1 | 206 | 51 | 46 | 269.7 | 12 | ⅞" | ¾" |
| 8" | 200 | 381 | 39.6 | 260 | 60 | 51 | 330.2 | 12 | 1" | ⅞" |
| 10" | 250 | 444 | 46.0 | 321 | 65 | 56 | 387.4 | 16 | 1⅛" | 1" |
| 12" | 300 | 521 | 49.3 | 375 | 72 | 60 | 450.8 | 16 | 1¼" | 1⅛" |
| 14" | 350 | 584 | 52.3 | 425 | 75 | 64 | 514.4 | 20 | 1¼" | 1⅛" |
| 16" | 400 | 648 | 55.6 | 483 | 81 | 68 | 571.5 | 20 | 1⅜" | 1¼" |
| 18" | 450 | 711 | 58.7 | 533 | 87 | 70 | 628.6 | 24 | 1⅜" | 1¼" |
| 20" | 500 | 775 | 62.0 | 587 | 94 | 73 | 685.8 | 24 | 1⅜" | 1¼" |
| 24" | 600 | 914 | 68.3 | 702 | 105 | 83 | 812.8 | 24 | 1⅝" | 1½" |
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 | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" = 600 | 15 | 95 | 14.2 | 38 | 22 | 16 | 66.5 | 4 | ⅝" | ½" |
| ¾" = 600 | 20 | 117 | 15.7 | 48 | 25 | 16 | 82.6 | 4 | ¾" | ⅝" |
| 1" = 600 | 25 | 124 | 17.5 | 54 | 27 | 18 | 88.9 | 4 | ¾" | ⅝" |
| 1¼" = 600 | 32 | 133 | 20.6 | 64 | 28 | 21 | 98.6 | 4 | ¾" | ⅝" |
| 1½" = 600 | 40 | 155 | 22.4 | 70 | 32 | 22 | 114.3 | 4 | ⅞" | ¾" |
| 2" = 600 | 50 | 165 | 25.4 | 84 | 37 | 28 | 127.0 | 8 | ¾" | ⅝" |
| 2½" = 600 | 65 | 190 | 28.4 | 100 | 41 | 32 | 149.4 | 8 | ⅞" | ¾" |
| 3" = 600 | 80 | 210 | 31.8 | 117 | 46 | 35 | 168.1 | 8 | ⅞" | ¾" |
| 3½" = 600 | 90 | 229 | 35.1 | 133 | 49 | 40 | 184.2 | 8 | 1" | ⅞" |
| 4" | 100 | 254 | 35.1 | 146 | 51 | 37 | 200.2 | 8 | 1" | ⅞" |
| 5" | 125 | 279 | 38.1 | 178 | 54 | 43 | 235.0 | 8 | 1" | ⅞" |
| 6" | 150 | 318 | 41.1 | 206 | 57 | 46 | 269.7 | 12 | 1" | ⅞" |
| 8" | 200 | 381 | 47.8 | 260 | 68 | 51 | 330.2 | 12 | 1⅛" | 1" |
| 10" | 250 | 444 | 53.8 | 321 | 73 | 56 | 387.4 | 16 | 1¼" | 1⅛" |
| 12" | 300 | 521 | 57.2 | 375 | 79 | 60 | 450.8 | 16 | 1⅜" | 1¼" |
| 14" | 350 | 584 | 60.5 | 425 | 84 | 64 | 514.4 | 20 | 1⅜" | 1¼" |
| 16" | 400 | 648 | 63.5 | 483 | 94 | 68 | 571.5 | 20 | 1½" | 1⅜" |
| 18" | 450 | 711 | 66.5 | 533 | 99 | 70 | 628.6 | 24 | 1½" | 1⅜" |
| 20" | 500 | 775 | 69.8 | 587 | 102 | 73 | 685.8 | 24 | 1⅝" | 1½" |
| 24" | 600 | 914 | 76.2 | 702 | 114 | 83 | 812.8 | 24 | 1⅞" | 1¾" |
| NPS | DN | O | tf | X | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 95 | 14.2 | 38 | 22 | 16 | 66.5 | 4 | ⅝" | ½" |
| ¾" | 20 | 117 | 15.7 | 48 | 25 | 16 | 82.6 | 4 | ¾" | ⅝" |
| 1" | 25 | 124 | 17.5 | 54 | 27 | 18 | 88.9 | 4 | ¾" | ⅝" |
| 1¼" | 32 | 133 | 20.6 | 64 | 28 | 21 | 98.6 | 4 | ¾" | ⅝" |
| 1½" | 40 | 155 | 22.4 | 70 | 32 | 22 | 114.3 | 4 | ⅞" | ¾" |
| 2" | 50 | 165 | 25.4 | 84 | 37 | 28 | 127.0 | 8 | ¾" | ⅝" |
| 2½" | 65 | 190 | 28.4 | 100 | 41 | 32 | 149.4 | 8 | ⅞" | ¾" |
| 3" | 80 | 210 | 31.8 | 117 | 46 | 35 | 168.1 | 8 | ⅞" | ¾" |
| 3½" | 90 | 229 | 35.1 | 133 | 49 | 40 | 184.2 | 8 | 1" | ⅞" |
| 4" | 100 | 273 | 38.1 | 152 | 54 | 41 | 215.9 | 8 | 1" | ⅞" |
| 5" | 125 | 330 | 44.4 | 189 | 60 | 48 | 266.7 | 8 | 1⅛" | 1" |
| 6" | 150 | 356 | 47.8 | 222 | 67 | 51 | 292.1 | 12 | 1⅛" | 1" |
| 8" | 200 | 419 | 55.6 | 273 | 76 | 57 | 349.2 | 12 | 1¼" | 1⅛" |
| 10" | 250 | 508 | 63.5 | 343 | 86 | 65 | 431.8 | 16 | 1⅜" | 1¼" |
| 12" | 300 | 559 | 66.5 | 400 | 92 | 70 | 489.0 | 20 | 1⅜" | 1¼" |
| 14" | 350 | 603 | 69.8 | 432 | 94 | 73 | 527.0 | 20 | 1½" | 1⅜" |
| 16" | 400 | 686 | 76.2 | 495 | 106 | 78 | 603.2 | 20 | 1⅝" | 1½" |
| 18" | 450 | 743 | 82.6 | 546 | 117 | 79 | 654.0 | 20 | 1¾" | 1⅝" |
| 20" | 500 | 813 | 88.9 | 610 | 127 | 83 | 723.9 | 24 | 1¾" | 1⅝" |
| 24" | 600 | 940 | 101.6 | 718 | 140 | 92 | 838.2 | 24 | 2" | 1⅞" |
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 | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" = 1500 | 15 | 121 | 22.4 | 38 | 32 | 22 | 82.6 | 4 | ⅞" | ¾" |
| ¾" = 1500 | 20 | 130 | 25.4 | 44 | 35 | 25 | 88.9 | 4 | ⅞" | ¾" |
| 1" = 1500 | 25 | 149 | 28.4 | 52 | 41 | 28 | 101.6 | 4 | 1" | ⅞" |
| 1¼" = 1500 | 32 | 159 | 28.4 | 64 | 41 | 30 | 111.1 | 4 | 1" | ⅞" |
| 1½" = 1500 | 40 | 178 | 31.8 | 70 | 44 | 32 | 124.0 | 4 | 1⅛" | 1" |
| 2" = 1500 | 50 | 216 | 38.1 | 105 | 57 | 38 | 165.1 | 8 | 1" | ⅞" |
| 2½" = 1500 | 65 | 244 | 41.1 | 124 | 64 | 48 | 190.5 | 8 | 1⅛" | 1" |
| 3" | 80 | 241 | 38.1 | 127 | 54 | 41 | 190.5 | 8 | 1" | ⅞" |
| 4" | 100 | 292 | 44.5 | 159 | 70 | 48 | 235.0 | 8 | 1¼" | 1⅛" |
| 5" | 125 | 349 | 50.8 | 190 | 79 | 54 | 279.4 | 8 | 1⅜" | 1¼" |
| 6" | 150 | 381 | 55.6 | 235 | 86 | 57 | 317.5 | 12 | 1¼" | 1⅛" |
| 8" | 200 | 470 | 63.5 | 298 | 102 | 64 | 393.7 | 12 | 1½" | 1⅜" |
| 10" | 250 | 546 | 69.8 | 368 | 108 | 71 | 469.9 | 16 | 1½" | 1⅜" |
| 12" | 300 | 610 | 79.2 | 419 | 117 | 76 | 533.4 | 20 | 1½" | 1⅜" |
| 14" | 350 | 641 | 85.9 | 451 | 130 | 83 | 558.8 | 20 | 1⅝" | 1½" |
| 16" | 400 | 705 | 88.9 | 508 | 133 | 86 | 616.0 | 20 | 1¾" | 1⅝" |
| 18" | 450 | 787 | 101.6 | 565 | 152 | 89 | 685.8 | 20 | 2" | 1⅞" |
| 20" | 500 | 857 | 108.0 | 622 | 159 | 92 | 749.3 | 20 | 2⅛" | 2" |
| 24" | 600 | 1041 | 139.7 | 749 | 203 | 102 | 901.7 | 20 | 2⅝" | 2½" |
| NPS | DN | O | tf | X | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 121 | 22.4 | 38 | 32 | 22 | 82.6 | 4 | ⅞" | ¾" |
| ¾" | 20 | 130 | 25.4 | 44 | 35 | 25 | 88.9 | 4 | ⅞" | ¾" |
| 1" | 25 | 149 | 28.4 | 52 | 41 | 28 | 101.6 | 4 | 1" | ⅞" |
| 1¼" | 32 | 159 | 28.4 | 64 | 41 | 30 | 111.1 | 4 | 1" | ⅞" |
| 1½" | 40 | 178 | 31.8 | 70 | 44 | 32 | 124.0 | 4 | 1⅛" | 1" |
| 2" | 50 | 216 | 38.1 | 105 | 57 | 38 | 165.1 | 8 | 1" | ⅞" |
| 2½" | 65 | 244 | 41.1 | 124 | 64 | 48 | 190.5 | 8 | 1⅛" | 1" |
| NPS | DN | O | tf | X | Y | T | W | 孔数 | 孔 Ø | 螺栓 Ø |
|---|---|---|---|---|---|---|---|---|---|---|
| ½" | 15 | 133 | 30.2 | 43 | 40 | 28 | 88.9 | 4 | ⅞" | ¾" |
| ¾" | 20 | 140 | 31.8 | 51 | 43 | 32 | 95.2 | 4 | ⅞" | ¾" |
| 1" | 25 | 159 | 35.1 | 57 | 48 | 35 | 108.0 | 4 | 1" | ⅞" |
| 1¼" | 32 | 184 | 38.1 | 73 | 52 | 38 | 130.0 | 4 | 1⅛" | 1" |
| 1½" | 40 | 203 | 44.4 | 79 | 60 | 44 | 146.0 | 4 | 1¼" | 1⅛" |
| 2" | 50 | 235 | 50.8 | 95 | 70 | 51 | 171.4 | 8 | 1⅛" | 1" |
| 2½" | 65 | 267 | 57.2 | 114 | 79 | 57 | 196.8 | 8 | 1¼" | 1⅛" |
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 · Y = 不含凸面的总长度 · T = 最小螺纹长度 · W = 螺栓孔圆. * 重量按碳钢几何尺寸估算。
常见问题
ASME B16.5 螺纹 (TH) 法兰：各压力等级的尺寸 用于什么场合？
带锥形 NPT 螺纹、无需焊接即可装配的法兰。适用于不便焊接、振动小、温度中等的场合。
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。
特殊合金螺纹（threaded）由 Dustre 锻造并机加工，任意压力等级，附 3.1 证书。
申请报价 