Normal Dished Heads

(r1 = da, r2 = 15 bis 50 mm) Diameter: 300 until 1600 mm
Hot or cold formed 

da = Outer diameter
h1 = Stepped-edge height
h2 = Dish height
h3 = Total height inner
r1 = Dish radius
r2 = Knuckle radius
s = Wall thickness