Pipe Name Comparison Table 
| Nominal size | |
| A (Metric) | B (Inch) |
| 6A | 1/8 |
| 8A | 1/4 |
| 10A | 3/8 |
| 15A | 1/2 |
| 20A | 3/4 |
| 25A | 1 |
| 32A | 1 1/4 |
| 40A | 1 1/2 |
| 50A | 2 |
| 65A | 2 1/2 |
| 80A | 3 |
| 90A | 3 1/2 |
| 100A | 4 |
| 125A | 5 |
| 150A | 6 |
| 200A | 8 |
| 250A | 10 |
| 300A | 12 |
| 350A | 14 |
| 400A | 16 |
| 450A | 18 |
| 500A | 20 |
*Actual dimensions may vary depending on the material.
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