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Ellipsoidal Head

Ellipsoidal Head

Ellipsoidal Head

(OP)
Can anyone tell me how to calculate the MAWP for an 8:1 ellipsoidal head?

RE: Ellipsoidal Head

not sure what a 8:1 ellisoidal head is

can you expound on the part?

RE: Ellipsoidal Head

(OP)
I have a tank head which is an 8:1 ellipse.  The ASME Code only covers a 2:1 ellipse.

RE: Ellipsoidal Head

I think you can't, at least staying within ASME VIII.
Your head is flatter than a 6% torispherical head, and the code prescribes a 6% knuckle radius as an absolute minimum.

prex
http://www.xcalcs.com : Online engineering calculations
http://www.megamag.it : Magnetic brakes for fun rides
http://www.levitans.com : Air bearing pads

RE: Ellipsoidal Head

Not trying be argumentative....but

I have been around a looooong time
and have never heard of a 8:1 head

Is this appearing on a drawing or what?

What determined that this is a 8:1 head

RE: Ellipsoidal Head

(OP)
The U-1 form.

RE: Ellipsoidal Head

Consider it a typo. But put your boots on and walk over to the vessel and verify it. By definition, your height of the head from the tangent line will be only 1/16 of the diameter. A 2:1 head height will be 1/4 of the diameter. This should be very easy to measure accurately enough to determine which one it is.

jt

RE: Ellipsoidal Head

See Section VIII-1 Appendix 1 paragraph 4(c).

-Christine

RE: Ellipsoidal Head

(OP)
Thanks Christine.

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