Elliptical bottom 1,9:1 and 2:1

We manufacture elliptical bottoms in two possible variants:

  • elliptical bottoms 1,9:1 per NFE 81-103
  • elliptical bottoms 2:1 per ASME VIII Div. 1.

Elliptical bottom 1,9:1

Elliptical bottom 1,9:1

Di = Do – 2t
CR = Di / 1,16
KR = Di / 5,39
SF = according NFE 81-103
DH = Di / 3,8
THi = SF + DH

elliptical bottom 2:1

elliptical bottom 2:1

Di = Do – 2t
CR = 0,9Di
KR = 0,17Di
SF = per request
DH = 0,25Di
THi = SF + DH

Technical explanations

Do = external head diameter

SF = straight flange height

Di = internal head diameter

DH = depth of dishing

CR = crown radius

THi = total internal head height

KR = knuckle radius

t = wall thickness

Here you can find an overview of our complete product range in PDF format available to