
| 公称尺寸 | 钢管外径 | 连接尺寸 | 法兰厚度 | 法兰内径 | 承插孔 | 法兰颈 | 法兰高度 | |||||
| 法兰外径 | 螺栓孔中心圆直径 | 螺栓孔直径 | 螺栓孔数量 | B2 | U | N | ||||||
| DN | NPS | A | D | K | L | n | C | B1 | H | |||
| 15 | 1/2 | 21.3 | 90 | 60.3 | 16 | 4 | 9.6 | 15.5 | 22.5 | 10 | 30 | 14 |
| 20 | 3/4 | 26.9 | 100 | 69.9 | 16 | 4 | 11.2 | 21 | 27.5 | 11 | 38 | 14 |
| 25 | 1 | 33.7 | 110 | 79.4 | 16 | 4 | 12.7 | 27 | 34.5 | 13 | 49 | 16 |
| 32 | 1 1/4 | 42.4 | 115 | 88.9 | 16 | 4 | 14.3 | 35 | 43.5 | 14 | 59 | 19 |
| 40 | 1 1/2 | 48.3 | 125 | 98.4 | 16 | 4 | 15.9 | 41 | 49.5 | 16 | 65 | 21 |
| 50 | 2 | 60.3 | 150 | 120.7 | 18 | 4 | 17.5 | 52 | 61.5 | 17 | 78 | 24 |
| 65 | 2 1/2 | 76.1 | 180 | 139.7 | 18 | 4 | 20.7 | 66 | 77.6 | 19 | 90 | 27 |
| 80 | 3 | 88.9 | 190 | 152.4 | 18 | 4 | 22.3 | 77.5 | 90.5 | 21 | 108 | 29 |
| 制造标准 | 压力等级 | 制造标准 | 压力等级 |
| HG/T 20592 | PN10 | GB/T 9117 | PN10 |
| PN16 | PN16 | ||
| PN25 | PN25 | ||
| PN40 | PN40 | ||
| PN63 | PN63 | ||
| PN100 | PN100 | ||
| HG/T 20615 | Class150 | Class150 | |
| Class300 | Class300 | ||
| Class600 | Class600 | ||
| Class900 | Class900 | ||
| Class1500 | Class1500 | ||
| ASME B16.5 | Class150 | ASME B16.5 | Class600 |
| Class300 | Class1500 | ||
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