Head Radius Specifications  Standard Flanged and Dished Dish radius (DR):
Equal to 100% of outside head diameter.
Knuckle radius (KR): 2"
(Over 24" in outside diameter.)
 ASME Flanged and Dished Dish radius (DR):
Equal to 100% of outside head diameter.
Knuckle radius (KR):
Minimum of 6% of outside head diameter.
 Shallow Flanged and Dished Dish radius (DR):
Equal to 1-1/4" per foot of dish area only.
Knuckle radius (KR): 2"
(Over 24" in outside diameter)
 Elliptical Dished Heads Elliptical heads are formed based on an 8-point ellipse radius.
 80% Dished Radius, 10% Knuckle Radius Dish radius (DR):
Minimum of 80% of inside head diameter.
Knuckle radius (KR): 2"
Minimum of 10% of inside head diameter.
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