| Metric | Standard | Extra Strong | Schedule 160 |
| Inch | Standard | Extra Strong | Schedule 160 |
| NPS | Reducing A | Full A |
| 1/8 | NA | NA |
| 1/4 | NA | NA |
| 3/8 | NA | NA |
| 1/2 | 28 | 28 |
| 3/4 | 32 | 32 |
| 1 | 38 | 38 |
| 1-1/4 | 44 | 44 |
| 1-1/2 | 51 | 51 |
| 2 | 55 | 55 |
| 2-1/2 | 62 | 62 |
| 3 | 73 | 73 |
| 3-1/2 | NA | NA |
| 4 | 84 | 84 |
| 5 | 94 | 94 |
| 6 | 105 | 105 |
| NPS | Reducing A | Full A |
| 8 | NA | NA |
| 10 | NA | NA |
| 12 | NA | NA |
| 14 | NA | NA |
| 16 | NA | NA |
| 18 | NA | NA |
| 20 | NA | NA |
| 24 | NA | NA |
