hillside opening in torispherical head calculation to asme 1

[abbver98]

Hi,
ASME BPVC VIII-1 considers only the case of opening within 80% of diameter. what about opening outside this area?
For Hillside opening in cylindrical shell, reinforcements parallel and perpendicular to the longitudinal axis analysis are required. There is nothing regarding Hillside opening in heads.
Any thoughts?

 

[Christine74]

"ASME BPVC VIII-1 considers only the case of opening within 80% of diameter."

ASME Section VIII doesn't prohibit you from installing a nozzle directly into the knuckle region of a head, even though this is generally recognized as a poor design practice.


-Christine

 

[SnTMan]

And that statement only applies to elliptical heads. Torispherical heads are addressed separately in UG-37, nomenclature "tr".

ALSO, "hillside" only truly applies to cylinders and cones where there is a difference between cylindrical and longitudinal stresses.

OP, I suggest you study up a1 q2

EDIT: delete

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

 

[Geoff13]

ASME Section VIII Division 1 doesn't limit where you can locate a nozzle.

However it does limit where the simple area replacement rules in UG-37 apply.

Where UG-37 isn't applicable you must meet U-2(g).

 

[r6155]

The nozzle can be installed anywhere on the torispherical head and try to avoid reinforcing pad.
Also use full penetration welding.
Don't forget inspections and examinations.

Regards