ASME Sec. VIII, Div. 1 - Ellipsoidal Head 2

[m_ridzon]

Folks, I am looking at 2021 ASME Sec. VIII, Div. 1, UG-32 for ellipsoidal heads. For the calculation of ellipsoidal head thickness, L states to look at Table UG-37 (image below).



If I look at Table UG-37 (image below), it does not look like it says anything about L for ellipsoidal heads.


Can someone explain where I am supposed to find L for ellipsoidal heads, and also the relevance of Table UG-37 in the search for L?

 

[IdanPV]

General Note (b) refer to Mandatory Appendix 1, 1-4(b).

 

[m_ridzon]

Wow, I'm stunned. They could not have made that more convoluted!

Thank you for helping me understand that!

 

[goutam_freelance]

L is equivalent spherical inside radius for ellipsoidal heads which is K1D as per table UG 37, where the first row is D/2h. D and h are defined in Figure 1-4 of MA-1.

Even though the parameter L does not appear directly in calculations, the parameter t/L is used as a criterion for application of formulae and other requirements.

MA-1, 1-4(a)

The equations in (c) and (d) given below shall be used
for t/L ≥ 0.002. For t/L < 0.002, the rules of (f) shall also
be met

 

[Krausen]

Wow, I'm stunned. They could not have made that more convoluted!

Thank you for helping me understand that!

Agreed. The modern VIII-1 code has devolved into something more akin to the IRS tax code written by lawyers instead of a true engineering code. VIII-1 should be overhauled entirely in my humble opinion. Would take an act of congress though.

 

[TGS4]

VIII-1 should be overhauled entirely in my humble opinion. Would take an act of congress though.

Nope - just need some engineers who are motivated to get involved and to participate and make the changes.

 

[m_ridzon]

Nope - just need some engineers who are motivated to get involved and to participate and make the changes.

I personally would love to be involved. However, I have noticed that the employer schedules and budgets in the commercial world generally do not support engineers' involvement in these types of activities. These "extracurricular" activities do not directly support company revenue. So it's hard to get employer support for it. Therefore, that means engineers have to take PTO time, nights and/or weekends to participate, which is very hard to do.

 

[Krausen]

Nope - just need some engineers who are motivated to get involved and to participate and make the changes.

I would be glad to

 

[r6155]

If you are "motivated" (as TGS4 says, I agree 100%) then evenings/weekends will be a pleasure.
Regards

 

[TGS4]

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