Composite Reinforcing Pad
Composite Reinforcing Pad
(OP)
We will need to increase the reinforcing area of some nozzles in an existing Pressure Vessel due to some modifications in the Operating Conditions. These nozzles are already reinforced with Pads nowadays. The easiest way would be welding another Pad over the existing one. Does anyone have experience on doing this? Is there anything in ASME Code Sec. VIII that doesn´t permit this type of solution?





RE: Composite Reinforcing Pad
I do not think you can weld a pad on top of another pad to make up for the reinforcement. ASME does not have any sketch highlighting this. However ASME does allow you to install a pad in the ID of the vessel, refer to UW 16.
1 a-3.
Regards
Merzi
RE: Composite Reinforcing Pad
RE: Composite Reinforcing Pad
UW-16c & UW-16d.
RE: Composite Reinforcing Pad
Thanks in advance!
Alcinei Nery
RE: Composite Reinforcing Pad
Pad reinforcement can be by increasing the thickness, Increasing the dia, by providing internal pad.
Increasing thickness can be by weld deposition.
Increase in dia can be done by cutting a plate such that the ID of the new pad is OD of the old pad (With necessary Weld preparations). Then weld the Old pad tonew pad by a butt joint and weld OD of the New pad with the vessel Wall.
if you opt to provide inside pad, provide at least 2 holes, on at the bottom (Lowest portion of the pad) another at the top. This will ensur there is no retained fluid between the pad and the Vessel wall. If you do not provide relieving, it could lead to failures.