I attached the photos of COD our API 650 Storage tank.
Tank Details:
Dia : 200 ft
Height : 48 ft
COD Base plate Thickness : 34mm
Annular plate Thickness ; 14 mm
As in our case, we are going to only replace the bottom reinforcement plate (or annular plate) of the clean out door.
Does we have to stress-relief the whole clean-out door assembly afterwards? or just PWHT of the new welding of the new annular plates to the new door reinforcement plate?
Or, in this case, is not required.
Please advise me.