Strengthening of pressure vessel nozzles
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This post was last edited by kareale88 on 2019-3-9 at 10:37. For the openings in the pressure vessel in bg4.png, an insertion-type fitting connection structure was chosen and reinforcement was applied; now it is necessary to change this to a „flush fitting“ style. What should be done? Do I need to cut off the original take over and start over? Or just need to cut off the inward protrusion and reinforce the inner wall? The pressure vessel is designed with a pressure of 2 MPA, a diameter of 2.4 m, a height of 4.5 m, and connections of DN100.
New device or old device? Consult the design and manufacturing departments!
New equipment – not yet finished, but the connection parts have been welded
1. Modify the design! 2. Check if the external reinforcement is sufficient; if not, increase the wall thickness of the fitting!
Oh, oh, is there a simple way? The outer surface now has a jacket, and to reinforce it from the outside, the jacket needs to be removed.
First, make the design changes; then conduct reinforcement calculations based on the new structure. Once it is approved, make the modifications according to the new structure.
Changing the insert-type fitting to a flush fitting probably isn’t easy to do
First, check whether the calculation sheet for the opening reinforcement area includes the protruding portion; if not, it should be changed to a flush design directly. If the protruding portion is already included, then the wall thickness of the pipe needs to be recalculated or additional reinforcement rings must be added. All such modifications require a design change. If the inner diameter of the pipe allows for modification, the wall thickness can be increased by welding material onto the inside of the pipe; however, since this is new equipment, it is likely that the owner will not permit such welding. It is recommended that if it’s not possible to make it perfectly flush, it’s better to use thick-walled pipes as a solution.