掌握 ASME B16.5 法兰尺寸
法兰尺寸表可确保正确安装、螺栓对齐和垫片就位。误读表格会导致代价高昂的错误。
主要尺寸参数
- NPS
- 公称管道尺寸(14 英寸以上非实际外径)
- 班级
- 压力等级150, 300, 600, 900, 1500, 2500
- 外径
- 法兰总直径
- 厚度
- 轮毂法兰厚度
- 螺栓圈
- 螺栓孔中心直径
- 螺栓数量
- 随 NPS 和班级而增加
150 级尺寸
| NPS | OD | 厚度 | 螺栓圈 | 螺栓 |
|---|---|---|---|---|
| 1/2 | 3.50 | 0.44 | 2.38 | 4 |
| 1 | 4.25 | 0.56 | 3.12 | 4 |
| 2 | 6.00 | 0.69 | 4.75 | 4 |
| 4 | 9.00 | 0.81 | 7.50 | 8 |
| 6 | 11.00 | 0.94 | 9.50 | 8 |
| 8 | 13.50 | 1.06 | 11.75 | 8 |
| 10 | 16.00 | 1.12 | 14.25 | 12 |
| 12 | 19.00 | 1.19 | 17.00 | 12 |
300 级尺寸
| NPS | OD | 厚度 | 螺栓圈 | 螺栓 |
|---|---|---|---|---|
| 1/2 | 3.75 | 0.56 | 2.62 | 4 |
| 1 | 4.88 | 0.69 | 3.50 | 4 |
| 2 | 6.50 | 0.88 | 5.00 | 4 |
| 4 | 10.00 | 1.12 | 7.88 | 8 |
| 6 | 12.50 | 1.38 | 10.62 | 8 |
| 8 | 15.00 | 1.56 | 13.00 | 8 |
| 10 | 17.50 | 1.69 | 15.25 | 12 |
| 12 | 21.00 | 1.81 | 18.50 | 12 |
常见错误
- 混淆 NPS 与实际尺寸
- 混合压力等级(150 不会栓到 300)
- 忽略面型(RF 与 RTJ)
松海法兰 提供所有产品的尺寸表和 CAD 图纸。
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