Head (vessel)
End cap on a cylindrically shaped pressure vessel / From Wikipedia, the free encyclopedia
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For other uses, see head (disambiguation).
Not to be confused with Head (watercraft).
A head is one of the end caps on a cylindrically shaped pressure vessel.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b3/Modified_Hanson_steelwatertank.jpg/320px-Modified_Hanson_steelwatertank.jpg)