Torispherical Head Reinforcement
Torispherical Head Reinforcement
(OP)
A customer wants to weld a circular "tank plate" into the center of a flanged and dished (torispherical) head to attach a magnetic mixing device. After welding the "tank plate" becomes a integral part of the vessel head. It is being treated as a "prefabricated pressure part" per UG-11. The "tank plate" does not satisfy the thickness requirements of Section VIII Division 1. Can a reinforcement, such as an external ring of material, be added outside the periphery of this "tank plate" to compensate for the insufficient thickness? The magnetic mixer does not pentrate the wall of the "tank plate".





RE: Torispherical Head Reinforcement
I am not aware of a method to reinforce this if it is not shown in UW-16 or UG-37.
RE: Torispherical Head Reinforcement
RE: Torispherical Head Reinforcement
Look through the recent Code Cases. The one of possible help was called "Local Thin Areas", if I remember correctly...
Regards,
Oleg
RE: Torispherical Head Reinforcement
If acceptable to your client and conforms to magnetic mixer installation requirements, you can provide an adaptor
plate that conforms to CODE requirements welded to the torispherical head and then weld your mixer tank plate
to this adaptor plate.