View dimensions in millimeters
| NPS | OD | E | T | E1 |
| 1/2 | 0.84 | 1.00 | 0.1 | 1.00 |
| 3/4 | 1.05 | 1.00 | 0.1 | 1.00 |
| 1 | 1.32 | 1.50 | 0.1 | 1.50 |
| 1-1/4 | 1.66 | 1.50 | 0.1 | 1.50 |
| 1-1/2 | 1.90 | 1.50 | 0.2 | 1.50 |
| 2 | 2.38 | 1.50 | 0.2 | 1.75 |
| 2-1/2 | 2.88 | 1.50 | 0.2 | 2.00 |
| 3 | 3.50 | 2.00 | 0.3 | 2.50 |
| 3-1/2 | 4.00 | 2.50 | 0.3 | 3.00 |
| 4 | 4.50 | 2.50 | 0.3 | 3.00 |
| 5 | 5.56 | 3.00 | 0.3 | 3.50 |
| 6 | 6.62 | 3.50 | 0.4 | 4.00 |
| 8 | 8.62 | 4.00 | 0.5 | 5.00 |
| 10 | 10.75 | 5.00 | 0.5 | 6.00 |
| 12 | 12.75 | 6.00 | 0.5 | 7.00 |
| NPS | OD | E | T | E1 |
| 14 | 14.00 | 6.50 | 0.5 | 7.50 |
| 16 | 16.00 | 7.00 | 0.5 | 8.00 |
| 18 | 18.00 | 8.00 | 0.5 | 9.00 |
| 20 | 20.00 | 9.00 | 0.5 | 10.0 |
| 22 | 22.00 | 10.00 | 0.5 | 10.0 |
| 24 | 24.00 | 10.50 | 0.5 | 12.0 |
| 26 | 26.00 | 10.50 | NA | NA |
| 28 | 28.00 | 10.50 | NA | NA |
| 30 | 30.00 | 10.50 | NA | NA |
| 32 | 32.00 | 10.50 | NA | NA |
| 34 | 34.00 | 10.50 | NA | NA |
| 36 | 36.00 | 10.50 | NA | NA |
| 38 | 38.00 | 12.00 | NA | NA |
| 40 | 40.00 | 12.00 | NA | NA |
| 42 | 42.00 | 12.00 | NA | NA |
| NPS | OD | E | T | E1 |
| 44 | 44.00 | 13.50 | NA | NA |
| 46 | 46.00 | 13.50 | NA | NA |
| 48 | 48.00 | 13.50 | NA | NA |
GENERAL NOTES:
(a) All dimensions are in inches.
(b) The shape of these caps shall be ellipsoidal and shall conform to the shape requirements as given in the ASME Boiler and Pressure Vessel Code.
NOTES:
(1) Length E applies for thickness not exceeding that given in column “Limiting Wall Thickness for Length, E.”
(2) Length E1 applies for thickness greater than that given in column “Limiting Wall Thickness” for NPS 24 and smaller. For NPS 26 and larger, length E1 shall be by agreement between the manufacturer and purchaser.