碳钢和不锈钢法兰-ASME/ANSI 类 150
ASME/ANSI 美标 B16.5-1996年管道法兰和法兰配件类 150法兰直径，内外螺栓圆、 数量和直径的螺栓
碳钢和不锈钢制的素质根据 ASME 美标 B16.5表
| 管道尺寸(英寸) | 法兰外径(英寸) | 管外直径(英寸) | 螺栓孔数 | 螺栓孔直径(英寸)1) | 螺栓圆周 (英寸) |
| 1/2 | 3-1/2 | 0.84 | 4 | 5/8 | 2-3/8 |
| 3/4 | 3-7/8 | 1.05 | 4 | 5/8 | 2-3/4 |
| 1 | 4-1/4 | 1.32 | 4 | 5/8 | 3-1/8 |
| 1-1/4 | 4-5/8 | 1.66 | 4 | 5/8 | 3-1/2 |
| 1-1/2 | 5 | 1.90 | 4 | 5/8 | 3-7/8 |
| 2 | 6 | 2.38 | 4 | 3/4 | 4-3/4 |
| 2-1/2 | 7 | 2.88 | 4 | 3/4 | 5-1/2 |
| 3 | 7-1/2 | 3.50 | 4 | 3/4 | 6 |
| 3-1/2 | 8-1/2 | 4.00 | 8 | 3/4 | 7 |
| 4 | 9 | 4.50 | 8 | 3/4 | 7-1/2 |
| 5 | 10 | 5.56 | 8 | 7/8 | 8-1/2 |
| 6 | 11 | 6.63 | 8 | 7/8 | 9-1/2 |
| 8 | 13-1/2 | 8.63 | 8 | 7/8 | 11-3/4 |
| 10 | 16 | 10.75 | 12 | 1 | 14-1/4 |
| 12 | 19 | 12.75 | 12 | 1 | 17 |
| 14 | 21 | 14.00 | 12 | 1-1/8 | 18-3/4 |
| 16 | 23-1/2 | 16.00 | 16 | 1-1/8 | 21-1/4 |
| 18 | 25 | 18.00 | 16 | 1-1/4 | 22-3/4 |
| 20 | 27-1/2 | 20.00 | 20 | 1-1/4 | 25 |
| 24 | 32 | 24.00 | 20 | 1-3/8 | 29-1/2 |
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