CR 0,8 Do
KR 0,154 x DO
SF 3 x t
DH 0,255 x Do - 0,635 x t
THi SF + DH
Legend Semi ellipsoidal head
t = wall thickness
Do = outside diameter
Di = inside diameter
CR = crown radius
KR = knuckle radius
SF = straight flange height
DH = dished height
THi = total height inside
