Basically a cap will be applied, to shut down the end of a pipe.The cap,as it is shown in the image below,is available for all pipe dimensions,and is sometimes also used for other purposes.
| NPS | Outside Diameter | H(End-to-End) | H1 |
| 16 | 16 | 7 | 8 |
| 18 | 18 | 8 | 9 |
| 20 | 20 | 9 | 10 |
| 22 | 22 | 10 | 11 |
| 24 | 24 | 10.5 | 12 |
| 26 | 26 | 10.5 | 12 |
| 28 | 28 | 10.5 | 12 |
| 30 | 30 | 10.5 | 12 |
| 32 | 32 | 10.5 | 12 |
| 34 | 34 | 10.5 | 12 |
| 36 | 36 | 10.5 | 12 |
| 38 | 38 | 12 | 13.5 |
| 40 | 40 | 12 | 13.5 |
| 42 | 42 | 12 | 13.5 |
| 44 | 44 | 13.5 | 15 |
| 46 | 46 | 13.5 | 15 |
| 48 | 48 | 13.5 | 15 |
| 50 | 50 | 14.5 | 16 |
| 52 | 52 | 14.5 | 16 |
| 54 | 54 | 16 | 17.5 |
| 56 | 56 | 16 | 17.5 |
| 58 | 58 | 16.5 | 18 |
| 60 | 60 | 16.5 | 18 |