Calculation for opening reinforcement
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Dear sea friends, as shown in the attached diagram, how should the calculations for hole reinforcement be carried out?
For pipes that look thin, such as those with sizes of 25 or 32, simply increase their thickness; in this way, SW6 can be omitted entirely (our company often uses this method)
What you mentioned is also a solution; it meets the condition that no additional reinforcement openings are needed according to Gb150. But what if this condition is not met? How should it be handled in such cases?
I’m not quite sure about this; I can’t answer it for now. (But generally, in this position and with this structure, it is used for liquid drainage at the bottom or gas discharge at the top of the heat exchanger shell side; the connections used are usually not very large, which is why I answered as I did – by simply increasing the thickness of the tube.)
Draw at a 1:1 scale – will the area be accurate then?
If the pressure is high, do not weld it to the cylinder; instead, drill holes in the tube sheet and weld the pipe to the tube sheet.