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钢制管法兰用金属环垫尺寸(摘自GB/T 9128-2003)
注：1. a仅适用于环连接密封面对焊环带颈松套钢法兰，b用于除对焊环带颈松套钢法兰以外的其他法兰。
2. R=A/2；R1=1.6 mm(A≤22.3 mm)；R1=2.4 mm(A＞22.3 mm)。
3. 本表的单位是mm。
| 公称通径DN | 环号 | 平均节径P | 环宽A | 椭圆形环高B | 八角形环高H | 八角形环的平面宽度C | ||||
|---|---|---|---|---|---|---|---|---|---|---|
| PN20 | PN50及PN110 | PN150 | PN260 | PN420 | ||||||
| — | 15 | — | — | — | R．11 | 34.13 | 6.35 | 11.11 | 9.53 | 4.32 |
| — | — | 15 | 15 | — | R．12 | 39.69 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 20 | — | — | 15 | R．13 | 42.86 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | — | 20 | 20 | — | R．14 | 44.45 | 7.94 | 14.29 | 12.7 | 5.23 |
| 25 | — | — | — | — | R．15 | 47.63 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 25 | 25 | 25 | 20 | R．16 | 50.8 | 7.94 | 14.29 | 12.7 | 5.23 |
| 32 | — | — | — | — | R．17 | 57.15 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 32 | 32 | 32 | 25 | R．18 | 60.33 | 7.94 | 14.29 | 12.7 | 5.23 |
| 40 | — | — | — | — | R．19 | 65.09 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 40 | 40 | 40 | — | R．20 | 68.26 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | — | — | — | 32 | R．21 | 72.24 | 11.11 | 17.46 | 15.88 | 7.75 |
| 50 | — | — | — | — | R．22 | 82.55 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 50 | — | — | 40 | R．23 | 82.55 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | 50 | 50 | — | R．24 | 95.25 | 11.11 | 17.46 | 15.88 | 7.75 |
| 65 | — | — | — | — | R．25 | 101.6 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 65 | — | — | 50 | R．26 | 101.6 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | 65 | 65 | — | R．27 | 107.95 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | — | 65 | R．28 | 111.13 | 12.7 | 19.05 | 17.47 | 8.66 |
| 80 | — | — | — | — | R．29 | 114.3 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 80a | — | — | — | R．30 | 117.48 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | 80b | 80 | — | — | R．31 | 123.83 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | — | 80 | R．32 | 127 | 12.7 | 19.05 | 17.46 | 8.66 |
| — | — | — | 80 | — | R．35 | 136.53 | 11.11 | 17.46 | 15.88 | 7.75 |
| 100 | — | — | — | — | R．36 | 149.23 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 100 | 100 | — | — | R．37 | 149.23 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | — | 100 | R．38 | 157.16 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | — | 100 | — | R．39 | 161.93 | 11.11 | 17.46 | 15.88 | 7.75 |
| 125 | — | — | — | — | R．40 | 171.45 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 125 | 125 | — | — | R．41 | 180.98 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | — | 125 | R．42 | 190.5 | 19.05 | 25.4 | 23.81 | 12.32 |
| 150 | — | — | — | — | R．43 | 193.68 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | — | — | 125 | — | R．44 | 193.68 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | 150 | 150 | — | — | R．45 | 211.14 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | 150 | — | R．46 | 211.14 | 12.7 | 19.05 | 17.46 | 8.66 |
| — | — | — | — | 150 | R．47 | 228.6 | 19.05 | 25.4 | 23.81 | 12.32 |
| 200 | — | — | — | — | R．48 | 247.65 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 200 | 200 | — | — | R．49 | 269.88 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | 200 | — | R．50 | 269.88 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | — | — | 200 | R．51 | 279.4 | 22.23 | 28.58 | 26.99 | 14.81 |
| 250 | — | — | — | — | R．52 | 304.8 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 250 | 250 | — | — | R．53 | 323.85 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | 250 | — | R．54 | 323.85 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | — | — | 250 | R．55 | 342.9 | 28.58 | 36.51 | 34.93 | 19.81 |
| 300 | — | — | — | — | R．56 | 381 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 300 | 300 | — | — | R．57 | 381 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | — | 300 | — | R．58 | 381 | 22.23 | 28.58 | 26.99 | 14.81 |
| 350 | — | — | — | — | R．59 | 396.88 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | — | — | — | 300 | R．60 | 406.4 | 31.75 | 39.69 | 38.1 | 22.33 |
| — | 350 | — | — | — | R．61 | 419.1 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | 350 | — | — | R．62 | 419.1 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | — | 350 | — | R．63 | 419.1 | 25.4 | 33.34 | 31.75 | 17.3 |
| 400 | — | — | — | — | R．64 | 454.03 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 400 | — | — | — | R．65 | 469.9 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | 400 | — | — | R．66 | 469.9 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | — | 400 | — | R．67 | 469.9 | 28.58 | 36.51 | 34.93 | 19.81 |
| 450 | — | — | — | — | R．68 | 517.53 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 450 | — | — | — | R．69 | 533.4 | 11.11 | 17.46 | 15.88 | 7.75 |
| — | — | 450 | — | — | R．70 | 533.4 | 19.05 | 25.4 | 23.81 | 12.32 |
| — | — | — | 450 | — | R．71 | 533.4 | 28.58 | 36.51 | 34.93 | 19.81 |
| 500 | — | — | — | — | R．72 | 558.8 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 500 | — | — | — | R．73 | 584.2 | 12.7 | 19.05 | 17.46 | 8.66 |
| — | — | 500 | — | — | R．74 | 584.2 | 19.05 | 25.4 | 23.81 | 12.32 |
| — | — | — | 500 | — | R．75 | 584.2 | 31.75 | 36.69 | 38.1 | 22.33 |
| — | 550 | — | — | — | R．81 | 635 | 14.29 | — | 19.1 | 9.6 |
| — | 650 | — | — | — | R．93 | 749.3 | 19.1 | — | 23.8 | 12.3 |
| — | 700 | — | — | — | R．94 | 800.1 | 19.1 | — | 23.8 | 12.3 |
| — | 750 | — | — | — | R．95 | 857.25 | 19.1 | — | 23.8 | 12.3 |
| — | 800 | — | — | — | R．96 | 914.4 | 22.2 | — | 27 | 14.8 |
| — | 850 | — | — | — | R．97 | 965.2 | 22.2 | — | 27 | 14.8 |
| — | 900 | — | — | — | R．98 | 1022.35 | 22.2 | — | 27 | 14.8 |
| — | — | — | — | — | R．100 | 749.3 | 28.6 | — | 34.9 | 19.8 |
| — | — | 650 | — | — | R．101 | 800.1 | 31.7 | — | 38.1 | 22.3 |
| — | — | 750 | — | — | R．103 | 914.4 | 31.7 | — | 38.1 | 22.3 |
| — | — | 800 | — | — | R．104 | 965.2 | 34.9 | — | 41.3 | 24.8 |
| — | — | 850 | — | — | R．105 | 1022.35 | 34.9 | — | 41.3 | 24.8 |
| 600 | — | 900 | — | — | R．76 | 673.1 | 7.94 | 14.29 | 12.7 | 5.23 |
| — | 600 | — | — | — | R．77 | 692.15 | 15.88 | 22.23 | 20.64 | 10.49 |
| — | — | 600 | — | — | R．78 | 692.15 | 25.4 | 33.34 | 31.75 | 17.3 |
| — | — | — | 600 | — | R．79 | 692.15 | 34.93 | 44.45 | 41.28 | 24.82 |
