Ellipsoidal head

There are 2 types of Ellipsoidal heads:

* Ellipsoidal head 2:1 acc. ASME VIII Div. 1 and 2
* Ellipsoidal head 1,9:1 acc. NF E 81-103

The dimension values 2:1 respectively 1,9:1 are the ratio between the small and the large axis of the ellipses. Both head shapes correspond nearly to the geometry of the Semi-ellipsoidal head acc. DIN 28013. The dimensions can be approximately calculated as follows:



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