Cone to Cylinder - Line of Support

[wailunwu]

Hi


When designing a cone bottom vessel for external pressure, in which case would we design the cone ends as line of support and which case we should not? Should the bottom cone attaching to the cylinder always be line of support? Please advise.

Thanks

 

[SnTMan]

wailunwu, care to reveal your Code of construction?

Regards,

Mike

The problem with sloppy work is that the supply FAR EXCEEDS the demand

 

[wailunwu]

ASME Sec VIII Div 1

 

[SnTMan]

wailunwu, it is up to the designer whether to consider the junction a line of support, or not. Rules are different, review UG-33(f).

If not a line of support, required cone thickness is not less than required thickness of attached cylinder. If a line of support, required cone thickness is calculated by the procedure in UG-33(f)(1). If the cone half apex angle exceeds 60 deg, see (f)(2).

In either case (line of support or not) rules of Apx 1-8 must be met. Additionally, if not a line of support a stiffening ring is required on the attached cylinder(s), so as to define the length "L" per UG-28. See UG-28 for definitions of lines-of-support.

The advantage to considering the junction a line-of-support is that no stiffening may be required on the attached cylinder(s) if Apx 1-8 is satisfied without one.

If the vessel is also subject to internal pressure rules of Apx 1-5 must be followed as well.

Regards,

Mike



The problem with sloppy work is that the supply FAR EXCEEDS the demand