Dished Only Head
Dished only heads are made so that the piece of metal takes a shape similar to a contact lens. This style of tank head has no knuckle radius or straight flange. Dished only tank heads are a simple, cost-effective solution for vacuum chambers, pressure vessel reinforcement, and storage tank roofs.
| R=De | R=0.8De | R=1.5De | |
| H(sin e) | 0.134De | 0.175De | 0.085De |
| Dd | 1.04De | 1.08De | 1.02De |
| V≈ | 0.054De³ | 0.072De³ | 0.034De³ |
